Ace 4710 active/standby SNMP config
We have 2 x Ace 4710 deployed in Active/Standby config. Since the configuration mode is disabled on the Standby unit, how can we configure the SNMP settings (such as location etc.) on the standby unit different from the active unit?
The 2 devices are in physically separated data centers so the SNMP location settings need to be set differently on both units. The standby unit does not allow any configuration.
Comments inline:
Since this is the admin context, we would better not do this. As i understand correctly, this will turn off the config sync on the 2 units and we may end up with some issues.
KM - Correct, you need to manually manage the configurations of both devices.
Also, if at a later stage, we sync the configs again in the admin context, it will overwrite the different config on the standby unit with that from the active unit?
KM - Correct, the device with the lower priority will be overwritten when config-sync is re-enabled. This is one of the reasons you need to be careful in the Admin context. For example: Ff the lower priority device has contexts defined that the primary does not, they would be removed when you re-enablethis command.
Since my requirement is just the SNMP location config, I do not think i should go for this; rather i can have some descriptive location setting identifying the 2 units in cluster mode...
KM - This would be more ideal than disabling config sync. You could also put both locations like this:
snmp-server location "San Jose, CA & Seattle, WA"
Regards
Kris
Similar Messages
-
Active/Standby Failover Config change
Hi everyone,
This weekend we are doing some change on ASA in Active/Standby mode.
We will power off standby ASA.
Do some changes on Active ASA save the changes and reboot it.
Power up the Active ASA and will test the connectivity if it is working or not .
In case Active ASA is not working as expected after the change i will power it off.
Power up Standby ASA then it will become active as expected.
Now if i Power up other ASA where changes were made will it synchnorize to old config from Standby ASA or not?
Last week we did some changes on Active ASA and it did not work as expected so we have to undo our change.
Need to make sure our backup plan is working?
Regards
MaheshIn your fall back scenario you would have to tell what was the secondary ASA that it is now the primary
change
failover lan unit secondary
to
failover lan unit primary
and vice-versa on the now primary ASA.
change
failover lan unit primary
to
failover lan unit secondary
Hope it helps -
ACE 4710 Active/Active using virtual partitions
Hi
I am completely new to the Cisco ACE devices but have been asked to look at deploying them. I have read the ACE virtual partioning paper which covers the ACE module, and it mentions the following;
"In an active/active high-availability design, both the primary and backup Cisco ACE modules are active simultaneously. The active virtual partitions are distributed across both modules, such that approximately half are active on the primary module and the remaining are active on the backup module."
My question is - does the same resilience model work the same using the Cisco 4710 appliances? I.e. can we split virtual partions across two physical devices thereby having an active/active scenario.
Apologies if this seems a very basic question.
Cheers
TSHi Tony
Yes, you can do the same on Appliance. One point which can be important for A/A implementation is that it's a good practice to have shared-vlan-hostid configured on ACEs.
Briefly - When ACE boots it randomly picks up a one out of 16 pools of MAC addresses and use them on interfaces. So, if you have contexts which are sharing the same VLAN on different ACEs , there is a possibility that both of ACEs pick up the same pool and you will have duplicated MAC addresses.
So you should configure something like this in Admin context (only on ACE which has Admin context active, configuration starts working only after reload of both devices) :
shared-vlan-hostid 1
peer shared-vlan-hostid 2
More detailed abou this quesiton you can see here :
http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/ace/vA4_2_0/configuration/administration/guide/redundcy.html#wp1076704 -
ACE 4710: Config Allows all traffic except large HTTP downloads
Hi Folks,
Got an ACE 4710 with a basic config that seems to work for all traffic except large downloads.
I've attached the current config
As I mentioned I can do normal HTTP to a standard destination like google or SSH through the ACE or ICMP
If i try to get a large file from the server side of ACE, then a trace shows that the first and subsequent 1460Byte packets dont go through ACE
I've thought of parse lengths, but i cannot see any that seem to affect the generic L4 maps that I am trying to use
Cheers
AlanI've seen a similar fault. I suppose a lower MSS was sent in the TCP SYN handshake packets (1300 or 1380?) and the packets exceeding that value were dropped by the ACE. This is the default behavior which can be switched to a less strict mode by either
exceed-mss allow
or
no normalization
commands.
In our case, a linux web server was whose replies wouldn't keep to the MSS limit. -
ACE 4710 - Internet Explorer cannot display the webpage randomly
We have a ACE 4710 with a basic config, (see below).
When clicking on a tab from a window within Interent explorer we occasionally get an issue with it returning: "Internet Explorer cannot display the webpage" The details show "Access is denied" accessing a particular line of a javascript file.
We have put one web server out of service in the farm to make sure that this isn't a result of stickyness not quite working.
We have tested extensively by going directly to the web server directly without the load balancer and cannot reproduce the problem but we can produce the issue within a few minutes when going to the load balanced address.
Thanks in advance for any advice.
HOST-1/Admin# show run
Generating configuration....
logging enable
logging fastpath
logging standby
logging timestamp
logging trap 6
logging history 6
resource-class SLB_ResourceClass_T_R
limit-resource all minimum 10.00 maximum unlimited
resource-class sticky
limit-resource all minimum 10.00 maximum unlimited
boot system image:c4710ace-t1k9-mz.A5_1_2.bin
peer hostname HOST-2
hostname HOST-1
interface gigabitEthernet 1/1
switchport access vlan 1000
no shutdown
interface gigabitEthernet 1/2
shutdown
interface gigabitEthernet 1/3
description LB003
switchport access vlan 1
shutdown
interface gigabitEthernet 1/4
description LB004
switchport access vlan 2
shutdown
interface port-channel 1
port-channel load-balance src-dst-port
no shutdown
clock timezone standard GMT
switch-mode
context Admin
description SUTLB01
member SLB_ResourceClass_T_R
access-list ALL line 8 extended permit ip any any
access-list ALL line 16 extended permit icmp any any
access-list everyone line 8 extended permit ip any any
access-list everyone line 16 extended permit icmp any any
probe tcp probe_tcp_80
port 80
rserver host Server_S_W301
description Server_S_W301
ip address x.x.32.152
inservice
rserver host Server_S_W302
description Server_S_W302
ip address x.x.32.154
inservice
serverfarm host sfarm_T_R
description sfarm_T_R
predictor leastconns
probe probe_tcp_80
rserver Server_S_W301 80
rserver Server_S_W302 80
inservice
sticky http-cookie Cookie1 T_R_sticky_cookie
cookie insert browser-expire
timeout 3600
serverfarm sfarm_T_R
class-map match-any T_R_L4Class
2 match virtual-address x.x.33.150 tcp eq www
class-map type management match-any remote_access
2 match protocol xml-https any
3 match protocol icmp any
4 match protocol telnet any
5 match protocol ssh any
6 match protocol http any
7 match protocol https any
8 match protocol snmp any
policy-map type management first-match remote_mgmt_allow_policy
class remote_access
permit
policy-map type loadbalance first-match T_R_L7policy
class class-default
sticky-serverfarm T_R_sticky_cookie
policy-map multi-match T_R_L4Policy
class T_R_L4Class
loadbalance vip inservice
loadbalance policy T_R_L7policy
loadbalance vip icmp-reply active
nat dynamic 2 vlan 1000
interface vlan 1000
ip address x.x.33.148 255.255.254.0
access-group input ALL
nat-pool 2 x.x.33.151 x.x.33.151 netmask 255.255.254.0 pat
service-policy input remote_mgmt_allow_policy
service-policy input T_R_L4Policy
no shutdown
ip route 0.0.0.0 0.0.0.0 x.x.32.1
ssh key rsa 1024 force+------------------------------------------+
+-------------- HTTP statistics -----------+
+------------------------------------------+
LB parse result msgs sent : 421347 , TCP data msgs sent : 2099597
Inspect parse result msgs : 0 , SSL data msgs sent : 0
sent
TCP fin msgs sent : 6169 , TCP rst msgs sent: : 769
Bounced fin msgs sent : 5 , Bounced rst msgs sent: : 1
SSL fin msgs sent : 0 , SSL rst msgs sent: : 0
Drain msgs sent : 337811 , Particles read : 5040829
Reuse msgs sent : 0 , HTTP requests : 342499
Reproxied requests : 183422 , Headers removed : 37475
Headers inserted : 342124 , HTTP redirects : 0
HTTP chunks : 224859 , Pipelined requests : 71466
HTTP unproxy conns : 267246 , Pipeline flushes : 0
Whitespace appends : 0 , Second pass parsing : 0
Response entries recycled : 71302 , Analysis errors : 0
Header insert errors : 22 , Max parselen errors : 215
Static parse errors : 99 , Resource errors : 0
Invalid path errors : 0 , Bad HTTP version errors : 0
Headers rewritten : 0 , Header rewrite errors : 0
SSL headers inserted : 0 , SSL header insert errors : 0
SSL spoof headers deleted : 0 , Unproxy msgs sent : 267246
HTTP passthrough stat : 0
NOTE - We did turn on caching at one point to try and resolve the issue but it has since been turned off -
Hi Experts,
I have Two ACE modules in bridge mode and its configured as active/standby.
But I cannot ping to the gateway from standby ACE. from the msfc side all the configurations are ok.
Could you plz help us to find the root cause of this ?
Rgds
AslamHi Aslam,
Can you please send me the config details of you admin Context by sending the output of the following commands:
# Show running-configuration
and
# show run ft
and # show ft group detail
I think there is some VLAN problem in your case either configured incorrectly or not included
Can you send your design
Like sample as follows:
FWSM--vlan 7--ACE-vlan 8---servers with default gateway as FWSM
Can you post the output for
show int vlan 505
sh arp
are you running ACE on a C6500 VSS pair?
Do you have an ip in your ACE vlan ?
If both of the device you are trying to ping are in the same VLAN as in ACE it does NOT route between VLANs so you cannot ping the interfaces in different VLANs.
Kindly send your config without which it will be difficult to figure out the exact root cause of your problem or any configuration mismatch.
Sachin Garg -
Need help to Configure Cisco ACE 4710 Cluster Deployment
Dear Experts,
I'm newbie for Cisco ACE 4710, and still I'm in learning stage. Meanwhile I got chance at my work place to deploy a Cisco ACE 4710 cluster which should load balance the traffic between two Application Servers based on HTTP and HTTPS traffic. So I was looking for good deployment guide in Cisco SBA knowledge base then finall found this guide.
http://www.cisco.com/en/US/docs/solutions/SBA/February2013/Cisco_SBA_DC_AdvancedServer-LoadBalancingDeploymentGuide-Feb2013.pdf
This guide totally fine with my required deployment model. I have same deployment environment as this guide contains with ACE cluster that connects to two Cisco 3750X (Stack) switches. But I have some confusion places in this guide
This guide follow the "One-armed mode" as a deployment method. But when I go through it further I have noticed that they have configured server VLAN as a 10.4.49.0/24 (all servers reside in it) and Client side VIP also in same VLAN which is 10.4.49.100/24 (even NAT pool also).
My confusion is, as I have learned about Cisco ACE 4710 one-armed mode deployment method, it should has two VLAN segments, one for Client side which client request come and hit the VIP and then second one for Server side. which means besically two VLANs. So please be kind enough to go through above document then tell me where is wrong, what shoud I need to do for the best. Please this is an urgent, so need your help quickly.
Thanks....!
-Amal-Dear Kanwal,
I need quick help for you. Following are the Application LB requirements which I received from my clinet side.
Following detail required for configuring Oracle EBS Apps tier on HA:
LBR IP and Name required to configure EBS APPS Tier (i.e, ap1ebs & ap2ebs nodes)
Suggested IP and Name for LBR:
IP : 172.25.45.x [should be on same 172.25.45 subnet of ap1ebs & ap2ebs nodes]
ebiz.xxxx.lk [on port 80 for http protocol accessibility]
This LBR IP & name must be resolve and respond on DNS network
Server Farm detail for LBR Setup
Following detail will be use for configuring the LBR:
LBR IP and Name :
IP : 172.25.45.x [should be on same 172.25.45 subnet of ap1ebs & ap2ebs nodes]
ebiz.xxxx.lk [on port 80 for http protocol accessibility]
This LBR IP & name must be resolve and respond on DNS network
Server Farm Detail for LBR setup:
Server 1 (EBS App1 Node, ap1ebs):
IP : 172.25.45.19
Server Name: ap1ebs.xxxx.lk [ap1ebs hostname is an example, actual hostname will be use]
Protocol: http
Port: 8000
Server 2 (EBS App2 Node, ap2ebs):
IP : 172.25.45.20
Server Name: ap2ebs.xxxx.lk [ap2ebs hostname is an example, actual hostname will be use]
Protocol: http
Port: 8000
Since my client needs to access URL ebiz.xxxx.lk which should be resolved by IP 172.25.45.21 (virtual IP) via http (80) before they deploy the app on the two servers I just ran web service on both servers (Linux) and was trying to access http://172.25.45.21 it was working fine and gave me index.html page. Now after my client has deployed the application then when he tries to access the page http://172.25.45.21 he cannot see his main login page. But still my testing web servers are there on both servers when I type http://172.25.45.21 it will get index.html page, but not my client web login page. What can I do for this ?
Following are my latest config :
probe http Get-Method
description Check to url access /OA_HTML/OAInfo.jsp
interval 10
faildetect 2
passdetect interval 30
request method get url /OA_HTML/OAInfo.jsp
expect status 200 200
probe udp http-8000-iRDMI
description IRDMI (HTTP - 8000)
port 8000
probe http http-probe
description HTTP Probes
interval 10
faildetect 2
passdetect interval 30
passdetect count 2
request method get url /index.html
expect status 200 200
probe https https-probe
description HTTPS traffic
interval 10
faildetect 2
passdetect interval 30
passdetect count 2
ssl version all
request method get url /index.html
probe icmp icmp-probe
description ICMP PROBE FOR TO CHECK ICMP SERVICE
rserver host ebsapp1
description ebsapp1.xxxx.lk
ip address 172.25.45.19
conn-limit max 4000000 min 4000000
probe icmp-probe
probe http-probe
inservice
rserver host ebsapp2
description ebsapp2.xxxx.lk
ip address 172.25.45.20
conn-limit max 4000000 min 4000000
probe icmp-probe
probe http-probe
inservice
serverfarm host ebsppsvrfarm
description ebsapp server farm
failaction purge
predictor response app-req-to-resp samples 4
probe http-probe
probe icmp-probe
inband-health check log 5 reset 500
retcode 404 404 check log 1 reset 3
rserver ebsapp1 80
conn-limit max 4000000 min 4000000
probe icmp-probe
inservice
rserver ebsapp2 80
conn-limit max 4000000 min 4000000
probe icmp-probe
inservice
sticky http-cookie jsessionid HTTP-COOKIE
cookie insert browser-expire
replicate sticky
serverfarm ebsppsvrfarm
class-map type http loadbalance match-any default-compression-exclusion-mime-type
description DM generated classmap for default LB compression exclusion mime types.
2 match http url .*gif
3 match http url .*css
4 match http url .*js
5 match http url .*class
6 match http url .*jar
7 match http url .*cab
8 match http url .*txt
9 match http url .*ps
10 match http url .*vbs
11 match http url .*xsl
12 match http url .*xml
13 match http url .*pdf
14 match http url .*swf
15 match http url .*jpg
16 match http url .*jpeg
17 match http url .*jpe
18 match http url .*png
class-map match-all ebsapp-vip
2 match virtual-address 172.25.45.21 tcp eq www
class-map type management match-any remote_access
2 match protocol xml-https any
3 match protocol icmp any
4 match protocol telnet any
5 match protocol ssh any
6 match protocol http any
7 match protocol https any
8 match protocol snmp any
policy-map type management first-match remote_mgmt_allow_policy
class remote_access
permit
policy-map type loadbalance first-match ebsapp-vip-l7slb
class default-compression-exclusion-mime-type
serverfarm ebsppsvrfarm
class class-default
compress default-method deflate
sticky-serverfarm HTTP-COOKIE
policy-map multi-match int455
class ebsapp-vip
loadbalance vip inservice
loadbalance policy ebsapp-vip-l7slb
loadbalance vip icmp-reply active
nat dynamic 1 vlan 455
interface vlan 455
ip address 172.25.45.36 255.255.255.0
peer ip address 172.25.45.35 255.255.255.0
access-group input ALL
nat-pool 1 172.25.45.22 172.25.45.22 netmask 255.255.255.0 pat
service-policy input remote_mgmt_allow_policy
service-policy input int455
no shutdown
ft interface vlan 999
ip address 10.1.1.1 255.255.255.0
peer ip address 10.1.1.2 255.255.255.0
no shutdown
ft peer 1
heartbeat interval 300
heartbeat count 10
ft-interface vlan 999
ft group 1
peer 1
no preempt
priority 110
associate-context Admin
inservice
ip route 0.0.0.0 0.0.0.0 172.25.45.1
Hope you will reply me soon
Thanks....!
-Amal- -
Facing Issue in ACE 4710 ..Secondary ACE showing as FSM_FT_STATE_STANDBY_COLD ...
Hi All ,
I am facing problem with my ACE 4710 in active-standby environment . When I check Show ft group detail on my Active ACE , it shows peer state as
FSM_FT_STATE_STANDBY_COLD for Admin context . Below is the output :
Primary_ACE/Admin#sh ft group detail
FT Group : 1
No. of Contexts : 1
Context Name : Admin
Context Id : 0
Configured Status : in-service
Maintenance mode : MAINT_MODE_OFF
My State : FSM_FT_STATE_ACTIVE
My Config Priority : 120
My Net Priority : 120
My Preempt : Enabled
Peer State : FSM_FT_STATE_STANDBY_COLD
Peer Config Priority : 100
Peer Net Priority : 100
Peer Preempt : Enabled
Peer Id : 1
Last State Change time : Tue Jan 1 05:32:55 2002
Running cfg sync enabled : Enabled
Running cfg sync status : Peer in Cold State. Error on Standby device when
applying configuration file replicated from active
Startup cfg sync enabled : Enabled
Startup cfg sync status : Peer in Cold State. Startup configuration sync ha
[7m--More--[m
s completed
Bulk sync done for ARP: 0
Bulk sync done for LB: 0
Bulk sync done for ICM: 0
FT Group : 2
No. of Contexts : 1
Context Name : APP_Context
Context Id : 1
Configured Status : in-service
Maintenance mode : MAINT_MODE_OFF
My State : FSM_FT_STATE_ACTIVE
My Config Priority : 120
My Net Priority : 120
My Preempt : Enabled
Peer State : FSM_FT_STATE_STANDBY_HOT
Peer Config Priority : 100
Peer Net Priority : 100
Peer Preempt : Enabled
Peer Id : 1
Last State Change time : Tue Jan 1 05:32:56 2002
Running cfg sync enabled : Enabled
[7m--More--[m
Running cfg sync status : Running configuration sync has completed
Startup cfg sync enabled : Enabled
Startup cfg sync status : Startup configuration sync has completed
Bulk sync done for ARP: 0
Bulk sync done for LB: 0
Bulk sync done for ICM: 0
Also when I give show ft config-errors on my secondary ACE it gives the following result .
Secondary_ACE/Admin#sh ft config-error
Mon Jun 10 00:04:11 IST 2002
`no 3 match virtual-address 10.40.3.15 tcp eq https`
Error: LB action requires match vip command
`no 3 match virtual-address 10.40.3.15 tcp eq 8082`
Error: LB action requires match vip command
`no 3 match virtual-address 10.40.3.21 tcp eq www`
Error: LB action requires match vip command
`no 3 match virtual-address 10.40.3.21 tcp eq https`
Error: LB action requires match vip command
`2 match virtual-address 10.40.3.21 tcp eq https`
Error: This configuration already exists
`2 match virtual-address 10.40.3.21 tcp eq www`
Error: This configuration already exists
`2 match virtual-address 10.40.3.15 tcp eq 8082`
Error: This configuration already exists
`2 match virtual-address 10.40.3.15 tcp eq https`
Error: This configuration already exists
Error(s) while applying config.
I am attaching the running configuration of both the ACE's . Kindly help me in resolving the issue .
Also I noticed one thing . There is configuration difference in Primary and Secondary ACE . I guess this is causing the issue .
Need help to fix this asap .
Following configuration is missing on the secondary ACE .
======================================================================
class-map match-all WEB_FARM_VIP-80
3 match virtual-address 10.40.3.15 tcp eq www
policy-map type loadbalance first-match WEB_FARM_VIP-80-l7slb
class class-default
serverfarm HTTP-2-HTTPS
class WEB_FARM_VIP-80
loadbalance vip inservice
loadbalance policy WEB_FARM_VIP-80-l7slb
Thanks ,
TusharDear all,
Pls help me out in this regard, I dont have much idea about ACE.
Regards,
Sashi -
ACE 4710 HTTPS load balance configuration
Have two ACE 4710 in HA setup. We would like to setup HTTPS loadbalance(actually just a primary and standby configuration in the serverfarm). Initially this would be for Exchange OWA connections but may expand to more HTTPS connections later.
I know there are several ways to do SSL with the ACE( client, server, end-to-end). I am just wanting to know the easiest way to deploy this? Is a certificate always needed on the ACE for each connection? In HA mode would a certificate be needed for both or does it replicate in some way to the other ACE?
Any configuration examples would be helpful.
Thanks.IF you terminate SSL on the ACE you need certificates and key on ace in the context in which you are doing the termination. The certs and keys need to be installed on the active and standby (manually unless using anm to manage).
when speaking of SSL
SSL termination refers to ace terminating SSL and sending to server as clear text
end to end - ACE terminates SSL (to look into payload to make a loadbalance decision or sticky decision) and then re-encrypts to the server, so to the client ACE is an ssl server and to the server the ace is an ssl client.
You can find some config examples at
http://docwiki.cisco.com/wiki/Category:Data_Center_Application_Services_Configuration_Examples -
ACE 4710: Find out the response time of a real server
Hi to everyone,
I have a couple of ACE 4710 and I need to find out what is the response time of a real server.
Is there a way for this?
Thank you for any answer!
giorgio romanoHi,
Kindly add the following line in your serverfarm configuration:
predictor response syn-to-synack
Suppose your serverfarm looks like this:
serverfarm host AAA_FARM
predictor response syn-to-synack
probe HTTP_PROBE
probe TCP9001_PROBE
rserver SC106
inservice
rserver SC107
inservice
rserver SC108
inservice
rserver SC109
inservice
rserver SC110
inservice
rserver SC111
inservice
rserver SC112
inservice
rserver SC113
inservice
rserver SC114
inservice
rserver SC120
inservice
rserver SC131
inservice
And then use the following command to see the average response time from your rserver as follows:
ACE1/prod# show serverfarm AAA_FARM detail
serverfarm : AAA_FARM, type: HOST
total rservers : 11
active rservers: 11
description : ServerFarm AAA
state : ACTIVE
predictor : RESPONSE
method : syn-to-synack
samples : 8
failaction : -
back-inservice : 0
partial-threshold : 0
num times failover : 0
num times back inservice : 0
total conn-dropcount : 0
Probe(s) :
HTTP_PROBE, type = HTTP
TCP9001_PROBE, type = TCP
----------connections-----------
real weight state current total failures
---+---------------------+------+------------+----------+----------+---------
rserver: SC106
x.x.x.x.:0 8 OPERATIONAL 2 1125 0
max-conns : 4000000 , out-of-rotation count : 0
min-conns : 4000000
conn-rate-limit : - , out-of-rotation count : -
bandwidth-rate-limit : - , out-of-rotation count : -
retcode out-of-rotation count : -
load value : 0
average response time (usecs) : 81 ----> thats what you might be looking for
From other day :
rserver: SC114
x.x.x.x:0 8 OPERATIONAL 70 10903 2
max-conns : 4000000 , out-of-rotation count : 0
min-conns : 4000000
conn-rate-limit : - , out-of-rotation count : -
bandwidth-rate-limit : - , out-of-rotation count : -
retcode out-of-rotation count : -
load value : 0
average response time (usecs) : 1334 ----> thats what you might be looking for
For Serverfarm BBB_FARM
serverfarm : BBB_FARM, type: HOST
total rservers : 1
active rservers: 1
description : ServerFarm BBB
state : ACTIVE
predictor : RESPONSE
method : syn-to-synack
samples : 8
failaction : -
back-inservice : 0
partial-threshold : 0
num times failover : 1
num times back inservice : 1
total conn-dropcount : 0
Probe(s) :
----------connections-----------
real weight state current total failures
---+---------------------+------+------------+----------+----------+---------
rserver: SC208
x.x.x.x:0 8 OPERATIONAL 0 0 0
max-conns : 4000000 , out-of-rotation count : 0
min-conns : 4000000
conn-rate-limit : - , out-of-rotation count : -
bandwidth-rate-limit : - , out-of-rotation count : -
retcode out-of-rotation count : -
load value : 0
average response time (usecs) : 0 ----> thats what you might be looking for
Use more detials for response predictor:
http://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/ace_appliances/vA3_1_0/configuration/slb/guide/rsfarms.html#wp1068831
Configuring the Application Response Predictor
To instruct the ACE to select the server with the lowest average response time for the specified response-time measurement based on the current connection count and server weight (if configured), use the predictor response command in server farm host or redirect configuration mode. This predictor is considered adaptive because the ACE continuously provides feedback to the load-balancing algorithm based on the behavior of the real server.
To select the appropriate server, the ACE measures the absolute response time for each server in the server farm and averages the result over a specified number of samples (if configured). With the default weight connection option configured, the ACE also takes into account the server's average response time and current connection count. This calculation results in a connection distribution that is proportional to the average response time of the server.
The syntax of this command is as follows:
predictor response {app-req-to-resp | syn-to-close | syn-to-synack}[samples number]
The keywords and arguments are as follows:
•app-request-to-resp—Measures the response time from when the ACE sends an HTTP request to a server to the time that the ACE receives a response from the server for that request.
•syn-to-close—Measures the response time from when the ACE sends a TCP SYN to a server to the time that the ACE receives a CLOSE from the server.
•syn-to-synack—Measures the response time from when the ACE sends a TCP SYN to a server to the time that the ACE receives the SYN-ACK from the server.
•samples number—(Optional) Specifies the number of samples over which you want to average the results of the response time measurement. Enter an integer from 1 to 16 in powers of 2. Valid values are 1, 2, 4, 8, and 16. The default is 8.
For example, to configure the response predictor to load balance a request based on the response time from when the ACE sends an HTTP request to a server to when the ACE receives a response back from the server and average the results over four samples, enter:
host1/Admin(config)# serverfarm SFARM1
host1/Admin(config-sfarm-host)# predictor response app-req-to-resp
samples 4
To reset the predictor method to the default of round-robin, enter:
host1/Admin(config-sfarm-host)# no predictor
To configure an additional parameter to take into account the current connection count of the servers in a server farm, use the weight connection command in server farm host predictor configuration mode. By default, this command is enabled. The syntax of this command is as follows:
weight connection
For example, enter:
host1/Admin(config)# serverfarm SF1
host1/Admin(config-sfarm-host)# predictor response app-request-to-resp
samples 4
host1/Admin(config-sfarm-host-predictor)# weight connection
To remove the current connection count from the calculation of the average server response time, enter:
host1/Admin(config-sfarm-host-predictor)# no weight connection
You can use threshold milliseconds parameter which is optional Specifies the required minimum average response time for a server. If the server response time is greater than the specified threshold value, the ACE removes the server from the load-balancing decision process (takes the server out of service).
Enter an integer from 1 to 300000 milliseconds (5 minutes). The default is no threshold (servers are not taken out of service).
In case if you have measures the response time from when the ACE sends a TCP SYN to a server to the time that the ACE receives a CLOSE from the server use syn-to-close (already discussed previously)
If you have to measures the response time from when the ACE sends a TCP SYN to a server to the time that the ACE receives the SYN-ACK from the server use syn-to-synack (already discussed previously)
SAMPLES parameter is optional and specifies the number of samples that you want to average from the results of the response time measurement and response time is used to select the server with the lowest response time for the requested response-time measurement. If you do not specify a response-time measurement method, the ACE uses the HTTP app-req-to-response method.
Whenever a server's load reaches zero, by default, the ACE uses the autoadjust feature to assign a maximum load value of 16000 to that server to prevent it from being flooded with new incoming connections. The ACE periodically adjusts this load value based on feedback from the server's SNMP probe and other configured options.
Using the least-loaded predictor with the configured server weight and the current connection count option enabled, the ACE calculates the final load of a real server as follows:
final load = weighted load × static weight × current connection count
where:
•weighted load is the load reported by the SNMP probe
•static weight is the configured weight of the real server
•current connection count is the total number of active connections to the real server
The ACE recalculates the final load whenever the connection count changes, provided that the (config-sfarm-host-predictor) weight connection command is configured. If the (config-sfarm-host-predictor) weight connection command is not configured, the ACE updates the final load when the next load update arrives from the SNMP probe.
If two servers have the same lowest load (either zero or nonzero), the ACE load balances the connections between the two servers in a round-robin manner.
HTH
Plz rate if u find it useful.
Sachin -
Access Server through VIP (ACE 4710) but very slow
Re: Access Server through VIP (ACE 4710) but very slow
Hi Shiva
Kindly Help .....Accessing the server very slow.., Plz check my real configuration... this configuration is for application server and after this i have to configure more serverfarm for different server like webmail etc. in this ACE 4710. I have only one ACE 4710 .
ACE Version A4(2.0) = is there supports Probe with this version.??? without probe server will work but very slow. And plz guide Nat-pool is required
VIP :-- 172.16.15.8
LB/Admin# sh run
Generating configuration....
no ft auto-sync startup-config
logging enable
logging host 172.29.91.112 udp/514
resource-class RC1
limit-resource all minimum 10.00 maximum unlimited
boot system image:c4710ace-mz.A4_2_0.bin
hostname LB
interface gigabitEthernet 1/1
description Management
speed 1000M
switchport access vlan 1000
no shutdown
interface gigabitEthernet 1/2
description clientside
switchport access vlan 30
no shutdown
interface gigabitEthernet 1/3
description serverside
switchport access vlan 31
no shutdown
interface gigabitEthernet 1/4
no shutdown
context Admin
description Management
member RC1
access-list everyone line 8 extended permit ip any any
access-list everyone line 16 extended permit icmp any any
probe http probe1
description health check
interval 5
passdetect interval 10
request method head
expect status 200 200
open 1
rserver redirect https_redirect
description redirect traffic to https
webhost-redirection / 302
inservice
rserver redirect maintenance_page
description maintenance page displayed
webhost-redirection /sry.html 301
inservice
rserver host web1
ip address 192.168.10.3
inservice
rserver host web2
ip address 192.168.10.4
inservice
rserver host web3
ip address 192.168.10.5
inservice
serverfarm host http
rserver web1
inservice
rserver web2
inservice
rserver web3
inservice
serverfarm redirect https_redirect_farm
description Redirect traffic to https
serverfarm redirect maintenance_farm
description send user to maintenance page
parameter-map type connection paramap_http
description parameter connection tcp
exceed-mss allow
sticky ip-netmask 255.255.255.0 address source Sticky_http
timeout activeconns
serverfarm http
class-map match-all REMOTE-ACCESS
class-map type management match-any remote_access
2 match protocol xml-https any
3 match protocol icmp any
4 match protocol telnet any
5 match protocol ssh any
6 match protocol http any
7 match protocol https any
8 match protocol snmp any
class-map match-all slb-vip
2 match virtual-address 172.16.15.8 tcp eq www
policy-map type management first-match remote_access
class class-default
permit
policy-map type management first-match remote_mgmt_allow_policy
class remote_access
permit
policy-map type loadbalance first-match slb
class class-default
serverfarm http
policy-map type inspect http all-match slb-vip-http
class class-default
permit
policy-map multi-match client-vips
class slb-vip
loadbalance vip inservice
loadbalance policy slb
loadbalance vip icmp-reply active
inspect http policy slb-vip-http
connection advanced-options paramap_http
interface vlan 30
description "Client Side"
ip address 172.16.15.24 255.255.255.0
access-group input everyone
service-policy input client-vips
no shutdown
interface vlan 31
description "Server Side"
ip address 192.168.10.1 255.255.255.0
service-policy input remote_access
no shutdown
interface vlan 1000
description managment
ip address 172.29.91.110 255.255.255.0
service-policy input remote_mgmt_allow_policy
no shutdown
ip route 0.0.0.0 0.0.0.0 172.16.15.1
snmp-server contact "PHQ"
snmp-server community phq group Network-Monitor
snmp-server trap-source vlan 1000
username admin password 5 $1$b2txbc5U$TA74D920oSdd2eOZ4hSFe/ role Admin domain
default-domain
username www password 5 $1$.GuWwQEK$r8Ub4OcE3l190d5GA4kvR. role Admin domain de
fault-domain
username prem password 5 $1$8C7eRKrI$it3UV4URZ26X4S/Bh6OEr0 role Admin domain d
efault-domain
ssh key rsa 1024 force
banner motd # "ro" #
Regards,
PremHi Shiva,
plz guide i'm new with ACE LB, also find my n/w design for connected ace to server. but server accessing very very slow, but when i connect through my old server software LB (with two interface)then accessing very fast. I just replace my old serverLB(with two interface) to ACE4710 and connect the same scenario then why not server accessing smoothly with VIP .Reply soon only I connect ACE's two interface with switch.....
Regards,
Prem -
Hi, We have two ACE-4710-K9 (named LB01 and LB02) configured in HA mode. Besides Admin, on each of them there are tree context configured, named, ACADEMIC, COMMERCIAL, STREAMING. On LB01 the active context is ACADEMIC. On LB02 the active contexts are COMMERCIAL and STREAMING. Each context is configured with a FrontEnd and a BackEnd Vlan interface, and a "management" Vlan interface used for accessing and monitoring the device and for the downloading of the needed ssl certificates. Recently we upgraded the devices to Version A3(2.6) form a previous A3(2.4). After that upgrade we experienced some strange behaviour. From the context in STANDBY state we are not able to ping the host on the "management" Vlan interface, while there is no problem on the other Vlans. We see that the ICMP packets are sent to the Vlan, are replayed by the remote host BUT are not received at all on the LB01 or LB02. No messages in the log. Trying with 5 consecutive (failed) ping we can see that the counters of unicast packet output on LB01/LB02 Vlan is incremented by 5 BUT the unicast packets input counters is unchanged even if the remote host sent the replays. In the STREAMING context this behaviour isn't constant, ie the ping *sometimes* starts working for a few second and then returns to stop. In the other standby context the ping never works instead. In the active context all works fine. This strange problem prevents us to load the ssl certificates in the STANDBY context from the "management" Vlan. We was not able to find any reference to a similar problem in the Cisco documentation or Tac collection, so we are curious to know wheter someone else experienced such a behaviour. Thank you and best regards. Alessandro Asson - CINECA
Thanks,
I see you are using shared VLAN config in both ACE.
Same VLAN 1000 is used for both Admin and streaming context.
In this config, you may need to use the shared-vlan-host-id command as explained here:
http://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/ace_appliances/vA3_1_0/configuration/routing_bridging/guide/vlansif.html#wp1025243
In fact as explained:
'By default, the bank of MAC addresses that the ACE uses is randomly selected at boot time. However, if you configure two ACE appliances in the same Layer 2 network and they are using shared VLANs, the ACEs may select the same address bank, which results in the use of the same MAC addresses. To avoid this conflict, you must configure the bank that the ACEs will use.'
This would also reply to your question in the readme file:
SHOW ARP TABLE ON THE D01,D02,D07 ROUTERS SHOWS THE SAME MAC ADDRESS FOR
BOTH IP ADDRESSES OF LB01 AND LB02: is that normal ??
Hope this helps,
Dom. -
ACE 4710 in failover - ssl offload, cert for second ACE
Hi,
I'm testing two ACE 4710 appliances that should work in active/standby mode and do ssl offload in bridged mode.
At the moment I have configured one of the devices to do basic load balancing (without ssl offload).
Now I would like to move further and configure ssl offload and configure High availability.
I read that the certificate for ssl can be localy generated on the ACE device but I couldn't find any information regarding the cert that should be used on the second ACE.
Should I generate a new cert od the standby unit or somehow use the one on the first ACE?
Is it better to first set up high availability and then configure ssl offload or vice versa?
Does anyone have a config example of ssl offload and active/standby configuration?
Thank you in advance.You simply need to generate keys & CSR on the primary ACE. Export the Keys from Primary ACE, Import these keys to Standby ACE and once you recieve the certs from CA then simply import the cert to both ACEs.
FOllowing will be steps to achive that
On primary Ace
1. create RSA Keys
crypto generate key 2048 app1.key
2. Create CSR & send it to CA
ace/Admin(config)# crypto csr-params app1-csr
ace/Admin(config-csr-params)# common-name www.app1.com
ace/Admin(config-csr-params)# country US
ace/Admin(config-csr-params)# email [email protected]
ace/Admin(config-csr-params)# locality xyz
ace/Admin(config-csr-params)# organization-name xyz
ace/Admin(config-csr-params)# organization-unit xyz
ace/Admin(config-csr-params)# state CA
ace/Admin(config-csr-params)# serial-number 1234
ace/Admin(config-csr-params)# end
ace/Admin(config)# crypto generate csr app1-csr app1.key
(copy the result to a file)
4. Import certificate recieved from CA
crypto import terminal app1.cert
(pasted the content from the cert)
5. verify the cert & keys match
crypto verify app1.key app1.cert
6. Export the keys from Active
crypto export app1.key
(copy the result to a file)
ON Standby ACE:
1. Import the keys
crypto import terminal app1.key
2. Import the cert
crypto import terminal app1.cert
3.verify the cert & keys match
crypto verify app1.key app1.cert
Hope this helps
Syed -
Hello,
I am running redundant ACE 4710 appliances running A3(2.7). I have five FT groups configured along with FT Tracking and when the vlans fail due to physical links being down, the contexts to do not failover. If one of the ACE boxes fail completely, failover works fine. I have included the FT config from one of the contexts below. I have a case open with TAC and the Engineer is suggesting the use of a query interface in additon to FT Tracking. We have had two incidents on separate contexts where we lost a physical interface on the primary ACE, one for the maintenance of the core switch, the other was a cable disconnect and we are unable to understand why the indivdual context didn't failover. Any ideas would be much appreciated. Let me know if more info/configs are needed.
Dave
ft interface vlan 900
ip address 10.10.10.1 255.255.255.0
peer ip address 10.10.10.2 255.255.255.0
no shutdown
ft peer 1
heartbeat interval 300
heartbeat count 20
ft-interface vlan 900
ft group 3
peer 1
no preempt
priority 210
peer priority 120
associate-context XYZ
inservice
FT Group : 3
No. of Contexts : 1
Context Name : XYZ
Context Id : 2
Configured Status : in-service
Maintenance mode : MAINT_MODE_OFF
My State : FSM_FT_STATE_ACTIVE
My Config Priority : 210
My Net Priority : 210
My Preempt : Disabled
Peer State : FSM_FT_STATE_STANDBY_HOT
Peer Config Priority : 120
Peer Net Priority : 120
Peer Preempt : Disabled
Peer Id : 1
Last State Change time : Wed Jan 11 13:14:16 2012
Running cfg sync enabled : Enabled
Running cfg sync status : Running configuration sync has completed
Startup cfg sync enabled : Enabled
Startup cfg sync status : Startup configuration sync has completed
Bulk sync done for ARP: 0
Bulk sync done for LB: 0
Bulk sync done for ICM: 0
show int
vlan424 is up, VLAN up on the physical port
Hardware type is VLAN
MAC address is 00:1e:68:1e:ba:b7
Virtual MAC address is 00:0b:fc:fe:1b:03
Mode : routed
IP address is 10.104.224.6 netmask is 255.255.255.0
FT status is active
Description:"New Server VIP and real"
MTU: 1500 bytes
Last cleared: never
Last Changed: Sun Mar 11 01:13:12 2012
No of transitions: 3
Alias IP address is 10.104.224.5 netmask is 255.255.255.0
Peer IP address is 10.104.224.7 Peer IP netmask is 255.255.255.0
Assigned on the physical port, up on the physical port
Previous State: Sun Mar 11 00:04:57 2012, VLAN not up on the physical port
Previous State: Sun Sep 18 10:21:15 2011, administratively up
3991888419 unicast packets input, 23734607976687 bytes
20246934 multicast, 174801 broadcast
0 input errors, 0 unknown, 0 ignored, 0 unicast RPF drops
1609345958 unicast packets output, 23690663385228 bytes
7 multicast, 55807 broadcast
0 output errors, 0 ignoredDave,
For tracking to work you need to have preempt enabled. Can you try enabling preempt under the ft group and test your tracking again? Another potential issue you may run into is if your tracking is not lowering the priority enough when it fails. The difference between the active and standby device is 100. If you are not decrementing the priority greater than this value even if priority is enabled it will not lower it enough to force the failover. If after enabling preempt on this group the tracking still does not work as expected send you whole config for us to look at.
Regarding the query interface; This is not a bad idea. It will help prevent an active active situation if there is a problem with the ft link between the two modules.
Thanks
Jim -
ACE 4710 in bridge mode not working
I am trying to configure ACE 4710 bridge mode and I am stuck up in physical interface configuration. I have configured gig1/2 of ACE as trunk port and on layer 2 switch I have assigned that interface (gig1/2) to VLAN 11. I tried trunk port also but it got disabled due to BPDU error.
I am not able to ping servers as well as gateway. Below are the topology and context configuration:
Router (vlan 13: IP 172.16.11.254)
|
ACE (int gig1/2)
|
L2 Switch
|
Servers (vlan 11: IP 172.16.11.1 and 11.2)
Admin Context
===========
resource-class rc1
limit-resource all minimum 0.00 maximum unlimited
limit-resource sticky minimum 0.20 maximum unlimited
boot system image:c4710ace-mz.A3_2_4.bin
interface gigabitEthernet 1/1
switchport access vlan 1000
no shutdown
interface gigabitEthernet 1/2
switchport trunk allowed vlan 11,13
no shutdown
interface gigabitEthernet 1/3
shutdown
interface gigabitEthernet 1/4
shutdown
access-list ALL line 8 extended permit ip any any
access-list everyone line 8 extended permit ip any any
access-list everyone line 16 extended permit icmp any any
class-map type management match-any remote_access
2 match protocol xml-https any
3 match protocol icmp any
4 match protocol telnet any
5 match protocol ssh any
6 match protocol http any
7 match protocol https any
8 match protocol snmp any
policy-map type management first-match remote_mgmt_allow_policy
class remote_access
permit
interface vlan 1000
ip address 172.16.16.16 255.255.255.0
access-group input ALL
service-policy input remote_mgmt_allow_policy
no shutdown
ip route 0.0.0.0 0.0.0.0 172.16.16.254
context test
allocate-interface vlan 11
allocate-interface vlan 13
member rc1
test Context
=========
access-list bpdu-fixup ethertype permit bpdu
access-list ALL line 8 extended permit ip any any
access-list ALL line 16 extended permit icmp any any
rserver host srv1
ip address 172.16.11.1
inservice
rserver host srv2
ip address 172.16.11.2
inservice
serverfarm host srv
rserver srv1
inservice
rserver srv2
inservice
sticky ip-netmask 255.255.255.255 address both SG1
timeout 120
serverfarm srv
class-map type management match-any remote-mgmt
201 match protocol snmp any
202 match protocol ssh any
203 match protocol icmp any
204 match protocol http any
205 match protocol https any
206 match protocol xml-https any
class-map match-all slb-vip
2 match virtual-address 172.16.11.10 any
policy-map type management first-match remote-mgmt
class remote-mgmt
permit
policy-map type loadbalance first-match slb
class class-default
sticky-serverfarm SG1
policy-map multi-match client-vips
class slb-vip
loadbalance vip inservice
loadbalance policy slb
loadbalance vip icmp-reply
interface vlan 11
bridge-group 1
access-group input bpdu-fixup
access-group input ALL
access-group output ALL
no shutdown
interface vlan 13
bridge-group 1
access-group input bpdu-fixup
access-group input ALL
access-group output ALL
service-policy input remote-mgmt
service-policy input client-vips
no shutdown
interface bvi 1
ip address 172.16.11.9 255.255.255.0
no shutdown
ip route 0.0.0.0 0.0.0.0 172.16.11.254
Could you pls. suggest where I am doing wrong?
Thanks,
Pawan" I tried trunk port also but it got disabled" <----- if your L2 config is not correct, nothing will work.
What is the setup on the switch ? Trunk or access vlan ?
What is the status of the interface ? up ? down ?
Do you see something in your arp table ?
Gilles.
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