Cisco CSS 11501 - High-Availabilty

We have a single CSS 11501 and were thinking about just buying a new one and putting it online as the standby with statefull (hopefully) failover, but weren't sure that this would work.
Does anyone know what is needed to create a high-availability Cisco CSS 11501 environment?
Do you only need 2 CSS 11501 and then configure them with one being active and the other being in a standby mode, like a PIX?
Is there a HA Cable that would need to be connected between the 2 CSS's?
Thanks in Advanced.
Joe

Daniel,
There is a new stateful failover mechanism for the Cisco CSS 11500.
This description is a bit "salesy" I know, but it covers the question asked :-)
The Cisco CSS 11500 delivers ASRthe industry's first stateful Layer 5 session redundancy feature that enables failover of important flows while maximizing performance. Some flowssuch as a long-lived File Transfer Protocol (FTP) or a database session may be mission critical, but many are not. Most solutions on the market today require all trafficimportant or notto be backed up from one box to another. If the majority of flows are not critical, then most of system performance is wasted on unnecessary back
ups. With ASR, the Cisco CSS 11500 may be configured so critical flows are marked as replication worthy, whereas others do not need to be so marked. ASR focuses traffic management resources precisely where needed.
Better yet, have a look at the following link focusing on the section on Stateless Redundancy.
http://www.cisco.com/univercd/cc/td/doc/product/webscale/css/css_510/advcfggd/redndncy.htm
Regards
Pete..

Similar Messages

Getting logs for DOS Attack:Sync Attack on cisco CSS 11501 frequently.

Hi ,
Since couple of weeks , i am getting below DOS attack logs on cisco CSS.Can anyone help me out about how can we avoid this? and how to deal with it.
04/23/2011 17:27:28:Enterprise:DOS Attack:SYN Attack -> 10 times
04/23/2011 17:30:15:Enterprise:DOS Attack:SYN Attack -> 10 times
04/24/2011 11:20:32:Enterprise:DOS Attack:SYN Attack -> 11 times
04/24/2011 11:24:48:Enterprise:DOS Attack:SYN Attack -> 12 times
04/24/2011 15:30:42:Enterprise:DOS Attack:SYN Attack -> 10 times
Thanks
Manish

Hi Nicolas,
Why i am asking about DOS attack as i am facing some issues for the 2 VIPs configured in cisco CSS 11501.
Can you help me troubleshooting the issue?
I have coming across some Load Balancing issues for the 2 VIPS configured on Cisco CSS11501.
We have cisco CSS 11501. We have 2 VIPs configured on it for FE and BE servers.Now Client calls to FE VIP and LB forwarding it to server and then FE server calls the BE VIP which goes through the same LB and forward to BE server under the VIP.When we start load test, we have observed after 2 hour test, application team getting HTTP timeout.As this application is used by Call center so getting timeout is bad.
Need to troubleshoot this issue if there is any problem from LB End.
Please find the attached file for VIP configs.

How to reset password on Cisco CSS 11501?

Hi,
I have changed the password for the Admin user (which was SuperUser) but when I changed it I forgot to add "SuperUser" at the end, now I don't have SuperUser access to the CSS 11501.
Can anyone shade some light on this problem and explain how can I reset the password for a SuperUser?
Thanks in Advance,
Shai

Hi Shai,
You need to reboot the CSS. When prompt, hit any key to go into the Offline Diagnostic Menu.
When you get in the menu, you will go to Administrative options and create an additional Admin user. When you do this, DO NOT use "admin", use something totally different.
Get out of the Offline DM and reboot the CSS. When the CSS comes up, login as the new user (which will have Superuser rights) and run the "username" cli to change the password of "admin" and add the superuser part this time.
Regards
Pete Knoops
Cisco Systems

Cisco CSS 11501 Capacity Planning

We have a pair of CSS 11501 units which currently have one VIP in front of two servers. Hence they are not being utilised at all.
I've been asked about putting some additional services on these but have no idea what sort of capacity they could take, i.e. max servers, max VIPs, max users/connections.
I've looked around but cannot find any documentation that helps. The following: http://www.cisco.com/en/US/prod/collateral/contnetw/ps5719/ps792/product_data_sheet0900aecd800f851e.html document states it has a '6Gbps Bandwidth Aggregate', which is strange as it doesn't even have that physical capacity?
Any help appreciated.

http://www.cisco.com/en/US/prod/collateral/contnetw/ps5719/ps792/product_data_sheet0900aecd800f851e.html
No limit for vip and server (except you need to keep your conig under 10k lines)
Number of concurrent connections is 200k per module and there is only 1 module in the 11501
Gilles.

Cisco CSS 11501

As part of my testing for a resilient pair of CSS11501's, I want to "shutdown" a service rather than just suspend it. Is this possible from the command line of this content switch, or is my only option to use a weighted "graceful" shutdown which obviously could take quite some time.
many thanks

Due to the following route statements on your CSS the servers response traffic is getting sent to IP/device 213.139.46.0.
ip route 213.139.46.35 255.255.255.255 213.139.46.0 1
ip route 213.139.46.36 255.255.255.255 213.139.46.0 1
Are the servers suppose to send their traffic to the 213.139.46.0 IP address? Or are they setup to use the 213.139.46.19 IP address as their gateway? If so, then the additional route statements should not be needed.
Also, have you verified the services have passed their keepalive check? Even though you have a URI of "/" and a keepalive port of "9080" on the services there is no keepalive type specified in the service configuration. The CSS should have defaulted to using ICMP keepaive check for the services.
- Jason

Cisco CSS 11501 Service Redirection

Hi,
We have kept CSS 1 & CSS 2 in DMZ zone & servers are kept at LAN segment. Proxy, DNS & OID (Oracle Instance ID) services are created at these CSS. I want users coming from outside will hit CSS at DMZ zone & based upon access requirement he will be redirected to the LAN servers for proxy , dns or OID access. Whether it is possible? If so then please guide me with the config...

you have to be careful when using the term redirect.
redirect is a possibility with HTTP.
For other protocols, there is no concept of redirect. But you can forward the traffic from the CSS in the DMZ to a server on the internal network.
The only thing to remember is that the CSS, like a firewall, needs to see all traffic from client to server and from server to client.
So, in your setup, since the CSS will not be inline between client-server, you have to find a way to force the traffic to go back to the CSS.
The easiest solution is to nat traffic going through the CSS.
The drawbacks is that the servers do not see the real client ip address. They just see the nated ip address.
Another solution, more complex is to use policy routing to intercept traffic and forward when need to the CSS.
Regards,
Gilles.

CSS 11501 Load Balancing Issue

Hi,
We are facing some issue in load balancing in cisco CSS 11501 as we are not able to access the application through virtual IP. Below is the ruuning configuration of the CSS:
CSS11501# sh running-config
!Generated on 10/06/2010 16:51:34
!Active version: sg0810106
configure
!*************************** GLOBAL ***************************
ip route 0.0.0.0 0.0.0.0 132.186.199.1 1
!************************** CIRCUIT **************************
circuit VLAN1
ip address 132.186.199.145 255.255.255.0
!************************** SERVICE **************************
service Server1
ip address 132.186.199.243
port 5001
protocol tcp
keepalive port 5001
active
service Server2
ip address 132.186.199.246
protocol tcp
port 5001
keepalive port 5001
active
!*************************** OWNER ***************************
owner L5_Owner
content L3_Rule
    vip address 132.186.199.146
    protocol tcp
    port 5001
    add service Server1
    add service Server2
    active
content L5_Rule
    vip address 132.186.199.146
    add service Server1
    add service Server2
    protocol tcp
    port 5001
    url "//132.186.199.146:5001/emi"
    active
CSS11501#
Observation : We are able to telnet on VIP: 132.186.199.146 on port 5001, but not able to access the application.
In Actual scenarion customer access application by accessing URL: http://132.186.199.243:5001/emi and once he enter this URL in web browser the request redirects ( by server itself) to URL: https://132.186.199.44:6002/cas/login?service=http%3A%2F%2F132.186.199.243%3A5001%2Femi%2Findex.jsp&acceptStrength=BASIC on backend server for user authenticaton and once user is authenticated then it again redirect to main URL ( http://132.186.199.243:5001/emi ) to access the application but when we are trying to access the application through VIP ( URL: http://132.186.199.146:5001/emi) we are not getting the login page as the request is not gettting redirected to backend server for user authentication.
Please suggest a solution here.

The problem is that you are in one-armed mode.
So you need to configure client nat.
Without nating the client ip address, the server response goes back directly to the client and bypasses the CSS.
Therefore the client receives a response from an unknown server ip address (not the vip).
So configure a group.
For example
group Client
    vip address 132.186.199.146
    add destination service Server1
     add destination service Server2
    active
Also, remove the url command from your content rule.
It is useless in your case and will just make performance worst.
Gilles.

Security on the Cisco CSS

I have a Cisco CSS 11501s attached to a Cisco 6000. I am using the CSS in an on arm design, which is basically a router on a stick. The Cisco 6000 only provides layer 2 switching. It utilizes 1 Ethernet interface on a single vlan.
I configure 3 VIPs for client connection.
- VIP 1 for SSL
- VIP 2 is for the clear text traffic from the
VIP1/proxy list.
- VIP 3 is for redirecting clear text traffic from
the client.
- All VIPs use the same address, but differing
ports.
I have a source group for all outbound traffic to the server farm. I tried to block traffic to the clear text interface, but I blocked all traffic. Is there an issue with one security of VIPs in a one-arm design?
Any design ideas?
Thank you

Hi,
If I understand correctly, you want to block the traffic destined to the VIP which is actually meant for the back-end traffic with the server once it is off the proxy-list. I understnad you use the VIP2 for this purpose as per your question and is same as the client side IP range.
Here is the solution just use a config what is known as "full-proxy" configuration by Cisco on the CSS. To do this you would need two different IP ranges. One would be for your client side (the one resolved by dns) and the other could be a different IP range preferably the non-routable private ip rnage like 192.168.x.x for the back-end server segment. You will now pick-up a VIP from server segment and assign it in the proxy-list with the 'cipher' specs.
In essence, this way you wouldn't be forced using the same VIP range for the servers and for the clients as well. You can have a private range on the back-end. This prevents traffic being targeted to your server segment from the client segment in the clear http in your case.
thanks

CSS 11501S GSLB DNS

Hi
I am in the process of planning for a GSLB failover solution for a web site. I have attached a very basic diagram showing an example of the topology.
The aim is to have two sites. A primary site and a DR site to be used as a failover solution.
The main site has two web servers that will need to be load balanced and the failover DR site will only have 1 web server.
My initial plan was to use 2 Cisco CSS 11501S devices as I believe this would provide the load balancing and GSLB functionality I require.
To achieve this I was going to use the CSS's as the primary and secondary name servers for the domain. This has raised a few question marksâ¦.
Both of our sites are connected to a private WAN (with private IP ranges). See attached diagram. Our internet access is provide through a third party âFirewall Portâ directly off the WAN. We don't manage the firewall that connects to the internet. This third party firewall provides the NAT for our public facing services (web servers, mail servers, ftp servers etc).
So my questions areâ¦
* Because the CSS's and web servers are located on a private network will the CSS's be able to respond to the DNS requests with the PUBLIC IP address (as seeen from the internet) of the servers as apposed to the private IP address of the servers? If the firewall in front of the CSS's was connected to the internet this could be done via DNS doctoring but our firewall is on a private subnet!
* Is it possible to get the CSS's to respond to DNS requests for other domain devices that do not reside behind the CSS - E.g. a MX record for a mail server that resides on another 'private' network?
*Is there a better way to achieve this?
Any assistance would be much appreciated!!

Thanks for the reponse Gilles. When you say
"If you configure the css to answer with the public ip address, you can't access your vip from the internal network anymore."
Do you mean that you will only get the public ip address from a DNS query and therefore this won't work locally?
If I have a host file entry providing the private address resolution for my internal hosts will this work?
"Also, be aware we do not support GSLB on the CSS anymore.
So, if this is a new install, it is better to start with a solution that we support - GSS"
Why is this no longer supported? Are there a lot of problems with GSLB on the CSS? It is pretty hard to justify the cost of a solution including 2 GSS's for GSLB and 1 CSS for server load balancing when comapred to the price of 2 CSS's with the enhanced license for both GSLB and server load balancing.
I have one client that wants to use their existing CSS's for a solution like this and another that is starting from scratch.
Thanks

High CPU utilization on CSS 11501 version sg0750303

Hi everyone,
I have the problem about High CPU utilization on CSS 11501 version sg0750303.
Our customer has used one pair of CSS 11501 (active-standby).
As a matter of convenience, called "Old CSS" after here in this post.
However traffic via Old CSS had been increasing so customer decided to add one more
pair (active-standby) of CSS to separate traffic.
Yesterday we installed new two CSS 11501 version sg0750303 (active-standby).
As a matter of convenience, called "New CSS" after here in this post.
Today, active CSS 11501 and standby CSS 11501 which were installed yesterday (New CSSs)
indicates High CPU utilization.
Active CSS 11501:
Peak CPU utilization: about 85%
Average CPU Utilization: about 60%
Standby CSS 11501:
Peak CPU utilization: about 40%
Average CPU Utilization: unknown
I do not understand why CPU utilization of both New CSSs become high.
The traffic pass through New CSS less than Old CSS, because the traffic is separated into
Old CSS and New CSS.
And CSS's configuration parameters (service, content, access-list) also less than Old CSS,
because real servers are also separated into Old CSS and New CSS.
Old CSS indicated average of CPU utilization about 20% before installing New CSSs yesterday,
in spite of all traffic pass through Old CSS only.
I wrote "New CSS remains High CPU utilization", however end users do not feel the
performance issue (e.g., performance delay, communication failure and so on) and
the traffic pass through New CSS normally.
So I have the question "CSS 11501 sg0750303 remains High CPU utilization on normal situation ?"
And customer uses MTRG to poll SNMP for Old CSSs and New CSSs.
So I have the question "CSS 11501 sg0750303 become High CPU utilization in case of receiving
SNMP polling ?".
Or if this situation is abnormal we need to start investigation.
Would you please let me know how do we investigate this situation.
I found the DDTS CSCek57080 "Performance issue using arrowpoint-cookie with ASR".
Release note of this DDTS says that
A customer was using a CSS pair configuration where arrowpoint-cookie
is being used along with a redundant-index on many content rules. When
the flow rate increased to a few hundred flows/sec, the peer message
queue of the CSS receiving ASR related message began to fill up.
When the peer message queue became over subscribed, the CPU increased
and the CSS became unstable.
New CSSs have configured redunrant-index on two content rules, and end users do not feel the
performance issue (e.g., performance delay, communication failure and so on) and
the traffic pass through New CSS normally.
So I think this DDTS does not related to this case.
Your information would be greatly appreciated.
Best regards,

Gilles,
Thank you very much for your cooperation.
I got the capture you instructed us.
The following are additional information from our customer.
At time user traffic path through the active CSS, active CSS indicates;
CPU utilization always range of 30% - 40%
Peak CPU utilization about 60% - 80%
At time there is no user traffic pass through active CSS, active CSS indicates;
CPU utilization always range of 0% - 5%
Attached files are named "Active CSS.log" and "Standby CSS.log".
"Active CSS.log" is captured on active CSS and "Standby CSS.log" is captured on
standby CSS.
I found the following process is using resource by looking the output of
"shell 1 1 spyReport" command.
On active CSS,
tFlowMgrPktR 8ba24070 50 26% ( 1469) 20% ( 26)
On standby CSS,
fmPeerMsgTas 8a511510 50 16% ( 176) 10% ( 7)
Your comment would be greatly appreciated.
Best regards,

CSS 11501 StartUp Problem

Hi all,
After i boot up for the first time, the CSS asked for change User/Pass, wich i perform a well known ones.
After that it's always impossible to login.
Is there any way of return to factory default Settings?
or
Is there any password recovery procedure?
or
What are the default User/Pass of the equipment?
I already done a Power Off/On on it with no results.
Best Regards,
Petr?nio

Hi,
I perform the password recovery, as it was documented and then its always getting the "CSS 11501 Offline Diagnostic Monitor menu (OffDM)" Menu, even if i dont press the Y key in the bootup question "Would you like to access the Offline Diagnostic Monitor? (Y)"
Any ideias?
How can i test the login i changed before?
Here is the bootup logging that appear's.
I'm not pressing any key.
******** Boot UP ********
CSS 11501 Offline Diagnostic Monitor menu (OffDM)
Version: 08.10.1.06
M A I N M E N U
Enter the number of a menu selection:
1* Set Boot Configuration
2. Show Boot Configuration
3* Advanced Options
4. Reboot System
> 4
Are you sure you want to reboot? (y/n) [n] y
Rebooting....
BootRom...booting
Copyright (1998-2002), Cisco Systems, Inc
Locked boot flash.
Validating operational boot flash, please wait...
Operational boot flash valid. Jumping to operational boot flash.
Copyright (1998-2002), Cisco Systems, Inc
Operational boot flash.
Attaching interrupt handlers...Done.
Built Mar 9 2006 @ 17:56:32
Version 08.10.1.06
Press to enter the Diagnostic Monitor
Ran 1 times, 24 tests. Detected 0 errors.
Booting OffDm @ 0xbff00000
SCM:MASTER Other:NOT-PRESENT
Initializing the disk...OK
Reading configuration records...
No Primary or Secondary Boot Record Found
FAILED
MGMT disabled, network port not active
Would you like to access the Offline Diagnostic Monitor? (Y)
Booting(-) ...
Transferring to menu...
Waiting for commands..
CSS 11501 Offline Diagnostic Monitor menu (OffDM)
Version: 08.10.1.06
M A I N M E N U
Enter the number of a menu selection:
1* Set Boot Configuration
2. Show Boot Configuration
3* Advanced Options
4. Reboot System
>

PRIME LMS 4.2 + High Availabilty

Hi all,
Does LMS 4.2 support Microsoft cluster solution for High Availabilty ?
I understand from Cisco Documentations that they use Veritas Cluster solution as well as Vmware Vmotion/HA for high available configuration of LMS.
But i would like to know if we can achieve this using Microsoft Cluster and if then, can some please share any documents/details pertaining to same ?
Sankar

Besides the supported Veritas method, the second best solution would be to snapshot your VM regularly and practice restore from that. A Microsoft Cluster solution would be an unsupported kludge.
You could also perform a system (application level) backup on a regular basis and restore from that.

CSS 11501 Trouble shooting data throughput

I have two groups of servers that talk to each other through the Load Balancer. It appears that on certain transactions where there is a "get", "head" or "trace" in the actual http data, the transaction is not forwarded through the CSS 11501. This happens maybe once in 11,000 transactions. It appears the word get, head or trace has to be in a certain part of the data payload to cause this problem too occur. Has anybody heard of such an issue? If so, do you have a work around? If not, any suggestion on how I can further isolate the issue. FYI I have a TAC case open but it does not appear to be going any where any time soon.

is it happening in the middle of a persistent connection or with the first request ?
There are 2 possibilities I can think off.
First one would be a flow timeout and the next request is just dropped because the css reclaim the fcb.
The 2nd option is that by default the CSS does not support the "TRACE" http method.
It must be enabled.
See info at :
http://www.cisco.com/en/US/products/hw/contnetw/ps792/products_command_reference_chapter09186a008040c3cf.html
So, configure a flow-timeout-multiplier and enable parsing of rfc2518 methods.
Gilles.

CSS 11501 DNS

Do I need a live internet/DNS environment to test this switch? I have bridged vlan2 to e1. my VIP is set to X.X.X.47 and I have to services set to X.X.X.45 and .46. They both say active. The e1 port is up but my vlan2 is down. I am assuming that the circuit is my problem.
When you define a vlan IP address, the manual says that this is the IP address that the CSS will recieve traffic from, so that would be the virtual IP .47 that links to either .45 or .46 right?
I am suppose to configure 1 web server ip per port on the CSS switch? I currently connect the 2 web servers to a 8 port 10/100 switch and I have a straight ethernet cable from that 10/100 switch to port 1 (e1) on the css Switch.
Are all my port numbers suppose to be configured to 80 since they are being used for HTTP? Am I to use the HTTP keepalive function as well?
I guess any additional info would be great. I guess this isn't a click, click, and go switch like someone said.

Ok. Thanks for the tip on the examples. I have tried to follow them as much as possible and have made progress, but I am still having problems with a few things that i can;t seem to find answers for.
CSS 11501 = IP 10.0.0.49 Subnet 255.255.255.0 Gateway 10.0.0.1
Srv01 = IP 10.1.0.45 Subnet 255.255.255.0 Gateway NONE
Srv02 = IP 10.1.0.46 Subnet 255.255.255.0 Gateway NONE
Dell 2708 = IP 10.0.0.13 subnet 255.255.255.0 Gateway 10.0.0.1
Client = IP 10.0.0.113 subnet 255.255.255.0 Gateway 10.0.0.1
I have Srv01 and Srv02 plugged into the CSS 11501 with IP address listed above. They reside in e7 and e8.
I have a cable from e1 to the dell 2708.
I have a laptop with a cable to the dell 2708.
I have configured a vlan (VLAN10) which includes ports e7 and e8 with an IP interface of 10.1.0.1. Status is active (GREEN)
I have configured two services with Srv01 and Srv02 and the status of both are active (Green)
I have created a content rule which includes both srv01 and srv02 with a VIP of 10.1.0.25. Status is active (green)
So I go to one of the web servers that is plugged into e7 or e8 and I can ping 10.1.0.25 sucessfully on both boxes. But I can only ping each servers IP address on its own box. In otherwords I can't ping cross server. When I try to access 10.1.0.25 from the servers the page doesn't come up. I know the VIP works because I can ping it.
I have also configured a VLAN (VLAN5) for e1 which goes to the dell 2708 with an IP of 10.0.0.48. But the status is down.
I am doing something wrong and can't seem to figure it out. any suggestions? I can diagram a picture in visio if you need a visual aid. I might consider Cisco University after all this.

CSS 11501 neighbors

I note that the CSS 11501 is a CM-supported device. This is according to the Supported Device Table for LMS 3.2.
My Campus Manager (5.2.1 with the CM6.0 device updates applied) lists my 11501's as unconnected devices even though they and their upstream neighbors are running CDP and seeing each other. I confirmed they are the correct device type (sysObjectID = 1.3.6.1.4.1.9.9.368.4.7). Ciscoview can see and manage them just fine.
Is there any way to make them properly appear as connected in the Campus Manager topology map?

The CSS devices all appear in the Unconnnected Devices view of Campus Manager. Walking cdpCacheTable on them returns:
The following is a SNMP walk of device 10.10.71.252 starting from .1.3.6.1.4.1.9.9.23.1.2.1
SNMP Walk Output
.1.3.6.1.4.1.9.9.23.1.2.1
CISCO-CDP-MIB::cdpCacheTable = No Such Object available on this agent at this OID.
They are CSS11501R's, each running:
CSS11501# sh ver
Version: sg0810106 (08.10.1.06)
I have four of them, each with multiple physical connections to a common upstream Catalyst 3560G-24TS. That device does show the CSS's as neighbors, along with its upstream switch. I have attached the switch's cdpCacheTable.
Here is a screenshot:

Cisco CSS 11501 - High-Availabilty

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