MulticastTest for Load balancing issue

Hi,
          We are currently facing issues with Load balancing using IIS Proxy plug-in.
          __WebLogicBridgeConfig list of dynamic servers does not return both servers. MulticastTest is the first resolution suggested by Bea Support on this page
          http://support.bea.com/application_content/product_portlets/support_patterns/wls/HTTPLoadBalancingInClusterUsingProxyPlug-inPattern.html
          Can someone please interpret following results of second utils.MulticastTest test.
          Thanx & Reagrds,
          Sagar
          I carried out two multicast tests with three machines with names ES01, ES02 & STAGE with different IP & Ports on the network.
          Following extract is from ES01 with IP 237.0.0.2 & port 8052. It finds 2 neighbors on lines 12 & 13 (ES02 & STAGE). Message exchange also looks fine.
          1     H:\>java utils.MulticastTest -n ES01 -a 237.0.0.2 -p 8052
          2     ***** WARNING ***** WARNING ***** WARNING *****
          3     Do NOT use the same multicast address as a running WLS cluster.
          4
          5     Starting test. Hit any key to abort
          6
          7     Using multicast address 237.0.0.2:8052
          8     Will send messages under the name ES01 every 2 seconds
          9     Will print warning every 600 seconds if no messages are received
          10
          11                     I (ES01) sent message num 1
          12     New Neighbor ES02 found on message number 1
          13     New Neighbor STAGE found on message number 1
          14     Received message 2 from ES01
          15                     I (ES01) sent message num 2
          16     Received message 2 from ES02
          17     Received message 2 from STAGE
          18     Received message 3 from ES01
          19                     I (ES01) sent message num 3
          20     Received message 3 from ES02
          21     Received message 3 from STAGE
          22     Received message 4 from ES01
          23                     I (ES01) sent message num 4                    Following extract is also from ES01 with IP 237.0.0.1 & port 8050. Note that this IP & port is also used by Weblogic cluster. In this case, test finds 3 neighbors on lines 12 & 16 (ES02 & STAGE) and another on line 13 with name "úWÿº?sr ?weblogic.rj".
          I am not sure if cluster is responding here. On 2 physical machines, we have 3 services - admin, Server_1 & Server_2, shouldn't it find more "Neighbors" if cluster is responding to test?
          Regarding Message exchange, there several "Duplicate messages" received from this neighbour like on line 17 and 35.
          1     H:\>java utils.MulticastTest -n ES01 -a 237.0.0.1 -p 8050
          2     ***** WARNING ***** WARNING ***** WARNING *****
          3     Do NOT use the same multicast address as a running WLS cluster.
          4
          5     Starting test. Hit any key to abort
          6
          7     Using multicast address 237.0.0.1:8050
          8     Will send messages under the name ES01 every 2 seconds
          9     Will print warning every 600 seconds if no messages are received
          10
          11                     I (ES01) sent message num 1
          12     New Neighbor ES02 found on message number 1
          13     New Neighbor úWÿº?sr ?weblogic.rj found on message number 1997013044
          14     Received message 2 from ES01
          15                     I (ES01) sent message num 2
          16     New Neighbor STAGE found on message number 1
          17     Duplicate message from úWÿº?sr ?weblogic.rj: 1997013044
          18     Received message 2 from ES02
          19     Received message 3 from ES01
          20                     I (ES01) sent message num 3
          21     Received message 2 from STAGE
          22     Received message 3 from ES02
          23     Received message 4 from ES01
          24                     I (ES01) sent message num 4
          25     Received message 3 from STAGE
          26     Received message 4 from ES02
          27                     I (ES01) sent message num 5
          28     Received message 5 from ES01
          29     Received message 4 from STAGE
          30     Received message 5 from ES02
          31     Received message 6 from ES01
          32                     I (ES01) sent message num 6
          33     Received message 5 from STAGE
          34     Received message 6 from ES02
          35     Duplicate message from úWÿº?sr ?weblogic.rj: 1997013044
          36     Received message 7 from ES01
          37                     I (ES01) sent message num 7

George,
Did you have to modify anything on the ECC side to get this to work/load balance? I made all the changes explained in the How to Scale Up doc (http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/c02f072f-3799-2c10-e0b8-d98d323c0908) to fully implement the Web Dispatcher.... but I was wondering how the ECC backend would know where to deliver outbound transactions. Does it get the WD system information from the SLD at the time it attempts to deliver a transaction to PI? Or do we have to update SM59 or someother configuration to make the ECC aware of the Web Dispatcher?

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Anyone of the MS's whichever started up first is locking up bdb and 500 server shows up when internal workspace is being launched with host specific url, where as it works fine for the host which actually locked up bdb (first MS that was started)
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Hey there,
I managed to fulfill my requirement..
If its a cluster on same machine or across machines, this should work
1. Login to machine, cd $DOMAIN_HOME
2. mkdir -p Apex_lsn_config/AdminServer Apex_lsn_config/<MS1> Apex_lsn_config/<MS2> # MS1 and MS2 are the Managed Server names as appropriate
#If you are planning for cluster spawning MS's across machines, make sure you create the dir's on step 2 for each machine respectively. (in my case $DOMAIN_HOME is not shared)
3. Copy apex-config.xml from the /tmp/apex or whatever location you have it currently to Apex_lsn_config/<MS1> Apex_lsn_config/<MS2>
4. cd $DOMAIN_HOME/bin; cp -p SetDomainEnv.sh SetDomainEnv.sh.orig #Backup the file
5. Append -Djava.io.tmpdir in SetDomainEnv.sh as below for JAVA_OPTIONS # Do it on both machine if you are not sharing DOMAIN_HOME and planning cluster across machines
-Djava.io.tmpdir=$DOMAIN_HOME/APEX_CONFIG/${SERVER_NAME}
Hint: Search for "iterativeDev" and append the same line with -Djava.jo.tmpdir
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<context-param>
<param-name>config.dir</param-name>
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7. Bounce Weblogic Admin and Manged Servers. Make sure to tail the Managed Server log to see apex-config.xml is picked from the new location.
8. Brew a Coffee for yourself :)
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Did it help?
Edited by: Oratime on Mar 25, 2013 2:44 AM

Round robin DNS for load balancing between multiple network adapters (Xserve)

I'm attempting to use 'round robin' DNS to load balance between the two ethernet adapters of an Xserve.
Both ethernet adapters are connected to the same LAN and have static IP addresses of 192.168.2.250 and 192.168.2.251.
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Having read up on round robin DNS, I would have expected DNS requests for 'macserver.private' to be answered with the two IP addresses ordered at random, achiving my aim of requests being served at random via each ethernet adapter.
However this doesn't seem to be the case. Doing a 'nslookup' from any of the network clients results in the two IP addresses being listed in the same order everytime. And pinging 'macserver.private' only ever results in a response from the same address.
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Thanks in advance for any help!

Be careful what you wish for
Round Robin DNS is rarely the best option for 'load balancing'. At the very least it's subject to caching at various point on the network - even at the client side, once the client looks up the address it will cache that response - this means that subsequent lookups may be served from the client's cache and not refer back to the server. Therfore any given client will always see the same address until the cache expires.
I suspect this is what you're seeing.
You can minimize this by setting a lower TTL on the records. This should result in the response being cached for a shorter period, meaning the client will make more requests to the server, with a higher change of using the 'other' address.
However, you're also going to run into issues with the server having two interfaces/addresses in the same LAN. This isn't recommended.
As Jonathon mentioned, you may be better off just bonding the two interfaces. This will provide an automatic level of dynamic load balancing without the latency of DNS caches, as well as automatic failover should one link fail (as opposed to round robin DNS which will cause 50% of requests to fail until the client cache expires and a new lookup is performed (and, even then, there's still a chance the client will try to use the failed link).

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Here's the rule config:
content HTTP_rule
add service ZSTS299102
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Remko,
in L3/L4 the CSS sends the SYN directly to the server.
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If there was some delay between the GET and the FIN, the CSS would have time to establish a connection with the server and the FIN could be simply forwarded.
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Gilles.

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Hello,
I'm a newbie to routers and on this discussion.
I've purchased a Linksys RV042 hoping I could connect my two ISP.
Both of them are 1/1 Mb, first is DSL second PPPoE connection.
The problem is that on system summary page it doesn't show me that second WAN is connected. Even when I trying to manually connect to Internet it doesn't help.
When this connection is in Load balance Mode, internet is very slow, sometimes it's even disconnected.
My question is:
How to configure Load Balance properly?
I've tried this page:
http://www.cisco.com/en/US/products/ps9923/products_qanda_item09186a0080a36632.shtml
but it didn't helped.
Or maybe it's just a demo of this option and doesn't work at all?
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Eliviszopa,
Hi. My name is Tiya and I am one of the Cisco SMB Support Engineers. I have been eyeing your post and I would like to add a few recommendations.
From what I've gathered, you are having an initial problem with your Dual-WAN configuration, in that you are unable to have both WAN interfaces Live at the same time. I will list a few things that will help you in determining if there is an issue with your RV042's Dual-WAN configuration and connectivity.
I understand your Network Topology to be: [ISP Modem 1 & ISP Modem 2]---->RV042---->LAN Clients (PC).
First thing, we need to ensure your router it at the most current firmware version for optimal performance. The RV042 series routers are currently in their 3rd HW revision, so we also need to ensure we download the firmware that is compatible with the HW version of your RV042
To locate HW version:
Look on the bottom of your RV042.
You will find the Serial Number and MAC      address sticker.
The HW Version will be visible by the      Model Number on that sticker.
Image below has a Red Square around the      Model Number and HW version of an older RV042 as a reference. HW is indicated      with 'v' and rational number, i.e. v1.1, v2.0. Your sticker may look      slightly different, but the content will be the same:
Now that we are certain of the HW version, check the release notes below to check the best firmware version for your RV042. I have provided a link below to the RV042 Release Notes:
Firmware v 4.0.0.7 Release Notes:      http://www.cisco.com/en/US/docs/routers/csbr/rv0xx/release/rv0xx_rn_v4-0-0-7.pdf
Firmware v 1.3312.19-tm Release Notes:      http://www.cisco.com/en/US/docs/routers/csbr/rv042/release/notes/RV042_RN_v1-3-12-19-tm.pdf
If your RV042 is using neither of the 2 firmwares, follow this link to download the correct version for your router:
http://www.cisco.com/cisco/software/type.html?mdfid=282414010&flowid=784
I would recommend you download and      'flash' your RV042 with the current compatible version of firmware to      address the possibility of software corruption.
Now, we need to reset your RV042 to factory defaults to remove any parameters previously configured and also, in essence, clear the router's memory so that we can start afresh. When this happens, your RV042 will return all settings to their default state; in other words, it will be as if you are pulling it out of the box for a new install. To do this:
Disconnect the RV042 from your network,      so that the only item the RV042 is only connected to the power outlet.
Locate the reset button on your RV042.      This will be on the front of your router and it will be recessed a bit.
Use a small tipped item; paperclips      usually work best, to hold down the reset button for 30 secs. Anytime less      will not guarantee a full reset to factory defaults.
Connect your RV042 to your PC. After      about 30 secs, ensure that you have an IP address of 192.168.1.100 on your      PC.
Now, let's test each WAN port with each of your ISP connections.
The next few steps will take us through a process that will ensure both WAN ports are working, and ultimately will help is in determining your Dual-WAN connectivity performance.
Connect one of your DSL modems to WAN1 and configure the WAN1 interface accordingly:
· DSL connections typically are UN-bridged by default; where you will see the modem is performing NAT. You will use DHCP as the WAN tupe for UN-bridged DSL connection types. This UN-bridged state can be recognized quickly in a couple of ways.
o    There is a PRIVATE IP address displayed as the WAN1 IP address, e.g. 192.168.x.x. where X is a number 0-254, 10.x.x.x where X is a number 0-254, or less commonly, 172.16.x.x where X is a number 0-254.
o    When connecting to the modem directly to your PC, you are able to reach the Internet.
o    If your DSL connection is UN-bridged, you must make sure the LAN IP Subnet of your Modem and Router are NOT the same.
o    Again, you will use DHCP as the WAN type for UN-bridged DSL connection types.
· DSL connection that is Bridged will require a PPPoE Username AND Password. This PPPoE username and password will be entered on the RV042 under the WAN type PPPoE. PPPoE connections can be quickly recognized in the same manner:
o    There is a PUBLIC IP address displayed as the WAN1 IP address AFTER correctly configuring WAN interface to use PPPoE and using correct UN/PW.
o    You are NOT able to reach the Internet when connecting your PC directly to your RV042.
· Contact your ISP to assist you in determining the bridged state of your modem to be absolutely certain.
2.     After you have properly configured WAN1 and confirmed Internet connection, configure WAN2 in the same fashion.
3.     Change Primary WAN to WAN2 by going to the following location in the RV042:
· System Management>Dual-WAN> Smart-Link Backup Primary : WAN2 (change this option)
4.     Disconnect DSL Modem from WAN1 and connect to WAN2.
5.     Power cycle the DSL Modem, RV042, and also disconnect your PC from the router as well while it is powered down.
6.     After about 5-10 sec, and in this order, power on your Modem, power on you RV042, and reconnect your PC to one of the LAN ports of your RV042
7.     After about 30-60 secs, test for Internet connectivity.
Now we will do the same for your other ISP connection.
1.     Disconnect all devices from the RV042, save your PC.
2.     Change Primary WAN to WAN1 by going to the following location in the RV042:
· System Management>Dual-WAN> Smart-Link Backup Primary : WAN1 (change this option)
3.     Connect 2nd ISP connection to WAN1 and configure according to Modem configuration, either DHCP or PPPoE.
4.     Power cycle the DSL Modem, RV042, and also disconnect your PC from the router as well while it is powered down.
5.     After about 5-10 sec, and in this order, power on your Modem, power on you RV042, and reconnect your PC to one of the LAN ports of your RV042
6.     After about 30-60 secs, test for Internet connectivity.
7.     Do the same for WAN2 using your 2nd ISP connection
At this point, we should now know for certain if both WAN Interfaces will allow Internet connectivity.
If you have problems with these steps, repost with the steps you took and the results.
If things are OK, then we will continue with configuring the router for Load Balance Mode:
1.     Navigate to System Management>Dual-WAN and change your selection from Smart-Link Backup to Load balance
2.     Configure both WAN1 and WAN2 with the configuration that correlates to the Modem connection it will receive.
3.     Connect both Modems to the correct WAN port on the RV042.
4.     Power cycle all devices; Both Modems, RV042, and PC
5.     Navigate to RV042 management page and check to see if there are IP addresses for WAN1 & WAN2 Interfaces.
If you have problems with these steps, repost with the steps you took and the results. Let us know your results.

ACE 4700 load balancing Issue

Hi,
I am new in ACE 4700. I have configured ACE 4700 for load balancing the FAX servers. Probe, ServerFarm, Real server, Virtual server, VIP state every thing is up and in service. But I am not able to access the real server using VIP IP address.
Below is the running configuration. Please help me to troubleshot the problem.
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Generating configuration....
no ft auto-sync startup-config
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ip address 10.26.12.130
conn-limit max 4000000 min 4000000
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[7m--More-- [m
[K
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predictor hash header Accept
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202 match protocol icmp any
203 match protocol telnet any
204 match protocol ssh any
205 match protocol http any
206 match protocol https any
207 match protocol snmp any
[7m--More-- [m
[K
policy-map type management first-match remote_mgmt_allow_policy
class remote_access
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policy-map type loadbalance first-match VSHOBACE-1-l7slb
class class-default
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policy-map multi-match global
class VSHOBACE-1
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    loadbalance vip icmp-reply
    nat dynamic 1 vlan 24
    nat dynamic 1 vlan 1000
service-policy input global
interface vlan 24
description "Client VLAN"
ip address 10.26.24.243 255.255.255.0
[7m--More-- [m
access-group input ALL
no shutdown
interface vlan 1000
ip address 10.26.12.132 255.255.255.0
peer ip address 10.26.12.133 255.255.255.0
access-group input ALL
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no shutdown
ft interface vlan 180
ip address 192.168.180.2 255.255.255.248
peer ip address 192.168.180.3 255.255.255.248
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ft peer 1
heartbeat interval 300
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peer 1
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[7m--More-- [m
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snmp-server contact "HOB_ACE"
snmp-server location "HOB"
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snmp-server user administrator Network-Monitor
snmp-server trap-source vlan 1000
username admin password 5 $1$GtO1e504$eGuyxxDcXck7SkxqBfRkI. role Admin domain
default-domain
username www password 5 $1$N5ClX7jy$kDhGgN.uukWQKvQMd3pY.1 role Admin domain de
fault-domain
ssh key rsa 1024 force
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Ashfaque

Hello Hossain,
Applying the policy globally on the box is commonly not the prefered way to go, you can use instead a single multi-match policy per SVI for easier managent; this will also also help to narrow down problems to a specific policy and VIP while T-Shooting.
Use the
ACE/Admin(config)# no service-policy input global
ACE/Admin(config)# interface vlan 24
ACE/Admin(config-if)# service-policy input global
Also you want to remove the NAT from the multi-match policy, you're running in routed mode so NAT should not be required; if it was required then you don't have any natpool configured or as Ahmad mentioned it was truncated from the configuration.
Something that caught up my attention is that your default route is pointing to the server VLAN that happens to be also your management VLAN, I'll have to lab it up but my first impression is that either the traffic coming to the VIP on vlan 24 should be always NAT'd to an IP of 10.26.24.X/24 before it gets to the ACE or else there will be a routing loop that will not allow the flow to complete correctly.
Do you happen to have a quick logical diagram of this piece of the network?
Thnx
Pablo

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I've got 2 ADSL lines and would like device to auto manage outgoing traffic .. Any idea ?
Regards

Hi,
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Hello Jin,
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Hello,
I have a working collector. config is source initiated, and pushed by GPO.
I would like to deploy a second collector for high availability and load balancing. What are the available options ? I have not found any guidance on TechNet articles.
As a low cost option, is it fine to simply start using DNS round-robin with a common alias for both servers pushed as a collector name through GPO ?
In my GPO Policy, if I individually declare both servers, events are forwarded twice, once for each server. Indeed it does cover high availability, but not really optimized.
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Hi,
>>As a low cost option, is it fine to simply start using DNS round-robin with a common alias for both servers pushed as a collector name through GPO ?
Based on the description, we can utilize DNS round robin to distribute workloads and increase fault tolerance. By default, DNS uses round robin to rotate the order of RR data returned in query answers where multiple RRs of the same type exist for a queried
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Regarding DNS round robin, the following article can be referred to for more information.
Configuring round robin
http://technet.microsoft.com/en-us/library/cc787484(v=ws.10).aspx
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Best regards,
Frank Shen

CF8/JRun4 Cluster for Load Balancing

Does anyone have an example of how to set up a CF8/JRun4
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I have three servers:
x004 - Linux - Apache2 (10.0.0.54,10.1.0.54)
x020 - Linux - JRun4/CF8 (10.0.0.70,10.1.0.70)
x021 - Linux - JRun4/CF8 (10.0.0.71,10.1.0.71)
Every server in our network has two network cards. One
network card is attached to 10.0.x.x which has a gateway to the
internet and runs at 100Mbps and is firewalled, and the other is
attached to 10.1.x.x which runs at 1Gbps and is internal with no
gateway. I'm trying to set it up so web traffic arrives on
10.0.0.54 into Apache and mod_jrun20 bootstraps a cluster named
STST using 10.1.0.54 which consists of STST_x020 coldfusion server
running on x020 and STST_x021 running on x021. I want the
communications between JRun4 on x020 and x021 to occur on the
10.1.x.x network and eventhough JRun and ColdFusion will only use
the 10.1.x.x network I still need the 10.0.x.x network card
attached for other purposes which require a gateway. I have
installed JRun4/CF8 about 10 times already and it seems I have no
control over what network JRun4 clusters on... sometimes it will
communicate on one, sometimes the other and without being able to
set which network is being used there always seems to be "network
error" on at least one of the two CF8 servers. I was able to get
everything working fine by disabling the network cards on the
10.0.x.x network and re-installing everything... but as soon as I
added the network cards back the whole thing was broken again.
How is this supposed to work? Most of the examples are either
no clustering or clustering on the same machine with Apache running
on the same box... I don't see any clustering across machines
examples.
How do I install a connector on a web server which doesn't
have JRun on it and get wsconfig to connect to a multi-machine
cluster when wsconfig only accepts a single IP address as a host
and the cluster is not listed?
How do I get JRun to bind to a specific network card?
Does this work if I choose a J2EE server other than JRun?
Any help anyone can provide is greatly appreciated. I'm
getting close to giving up which means staying on the non-clustered
environment and figuring out how we can deal with scalability by
switching to something else.

The article at
http://www.adobe.com/go/1e8e9170
is specific to configuring two or more cluster nodes that reside on
separate networks, e.g. 10.0.1.0/24 and 10.0.2.0/24. (The article
doesn't state it, but you can only use unicast peers if your
cluster nodes host a single instance of JRun or multiple instances
of JRun in the same cluster domain. When performing unicast
discovery, JRun looks for all Jini groups and not just the cluster
group.)
Anyhow, that's not your problem. The simplest solution is you
haven't enabled the jrun.servlet.jrpp.JRunProxyService service. I'm
most familiar with the Windows version of JRun, but I'm assuming
the directory structure is similar across platforms. In
<jrun_root>/servers/<name>/SERVER-INF/jrun.xml, set the
deactivated attribute of the jrun.servlet.jrpp.JRunProxyService
service to false and restart JRun. You should now see JRun
listening on the appropriate port. (The default for the first
manually created instance is 51000.) You can limit the proxy
service to a single interface using the interface attribute.
If you have enabled the proxy service, verify your security
settings in <jrun_root>/lib/security.properties. It's usually
best to limit access to specific hosts. Comment out the
jrun.subnet.restriction parameter and set the jrun.trusted.hosts to
the IP address of your web server, e.g. 10.1.0.54.
Forcing all JRun processes/services to listen on a single
interface isn't difficult, but it does require modifying quite a
few configuration files by hand. If you need assistance with that,
I can elaborate.
Configuring the JRun module under Apache is pretty
straightforward. If you're not using virtual hosts, it's very
simple. If you are using virtual hosts, it's still simple, but your
JRun configuration can be virtual host-specific.
On your Apache server, you'll want to create a directory
structure for the JRun module. I'll assume
/opt/jrun/lib/wsconfig/1, but you can use anything you want. Once
the directory structure is created, extract the appropriate JRun
module from wsconfig.jar to the new directory. You're most likely
interested in the Apache 2.0 module,
wsconfig.jar/connectors/apache/intel-linux/prebuilt/mod_jrun20.so.
Let's assume you've extracted the module to
/opt/jrun/lib/wsconfig/1/mod_jrun20.so. Your Apache service account
should have read, write, and execute permissions on the
/opt/jrun/lib/wsconfig/1 directory.
The JRun module configuration is normally appended to your
current httpd.conf file by wsconfig. Here's a sample configuration:
LoadModule jrun_module
"/opt/jrun/lib/wsconfig/1/mod_jrun20.so"
<IfModule mod_jrun20.c>
JRunConfig Verbose false
JRunConfig Apialloc false
JRunConfig Ssl false
JRunConfig Ignoresuffixmap false
JRunConfig Serverstore
"/opt/jrun/lib/wsconfig/1/jrunserver.store"
JRunConfig Bootstrap 10.1.0.70:51000
#JRunConfig Errorurl <optionally redirect to this URL on
errors>
#JRunConfig ProxyRetryInterval 600
#JRunConfig ConnectTimeout 30
#JRunConfig RecvTimeout 30
#JRunConfig SendTimeout 30
AddHandler jrun-handler .jsp .jws .cfm .cfml .cfc .cfr
.cfswf
</IfModule>
You may also want to update your DirectoryIndex directive
with an appropriate index page, e.g. index.cfm.
After the first request to a page handled by the JRun module
is received, the module will query the boostrap server,
10.1.0.70:51000, for a list of cluster peers. If you've configured
your cluster correctly, a line similar to following will be written
to /opt/jrun/lib/wsconfig/1/jrunserver.store:
proxyservers=10.1.0.70:51000;10.1.0.71:51000
You can create/edit this file manually as well.
Unfortunately, the bootstrap option only accepts one server. If
your bootstrap server is down, the JRun module will use the values
in jrunserver.store directly, if the file exists.
Here's a complete list of JRun module options:
metrics *
debugger *
ssl *
verbose
traceflags
serverstore
bootstrap
errorurl
apialloc
ignoresuffixmap
proxyretryinterval
connecttimeout
recvtimeout
sendtimeout
sslcalist
Options flagged with an asterisk can only be configured at
the Apache server level. All other options can be configured at the
server level and/or the virtual host level. The usage of these
options is in the JRun documentation, and the JRun module source
code is included in wsconfig.jar. Keep in mind that versions of the
JRun module shipped prior to ColdFusion 8 were coded to assign the
connecttimeout and sendtimeout options to the socket connection
timeout. Whichever option appeared last in your configuration ended
up as the final value. This has been fixed in ColdFusion 8 and
presumably the next release of the JRun updater.
I think that's a good start. If you need more information or
can't find what you need in the JRun or ColdFusion documentation,
let me know.
If you're looking for resiliency, I highly recommend
expanding your configuration to include a second web server and a
hardware load-balancer (preferably one that supports redudancy via
multiple paths and devices, e.g. devices from Cisco, F5, or Foundry
Networks). Often, however, running Apache on the ColdFusion
server(s) provides adequate performance, and round-robin DNS
records coupled with the ability to update DNS quickly in the event
of a failure may be all you need for load-balancing and
failover.

Webdispatcher for Load balancing

Hi All,
We have implemented EP7. The portal is configured to redirect to https.
Now we want to use sapwebdispatcher for load balancing.
We are performing the following steps to configure the sapwebdispatcher
1. uncar the icmadmin.SAR
2. sapwebdisp -bootstrap
The following screen appears:
This bootstrap will perform the following steps:
1. create profile file "sapwebdisp.pfl"for SAP Web Dispatcher (if not already existing)
2. create user for web based administration in file "icmauth.txt"(if not already exisiting)
3. start SAP Web Dispatcher with the created profile
After the bootstrap you can use the web based administration
Generating Profile "sapwebdisp.pfl"
Hostname of Message Server (rdisp/mshost): <hostname>
HTTP Port of Message Server (ms/http_port): 8101
Checking connection to message server...OK
Unique Instance Number for SAP Web Dispatcher (SAPSYSTEM): 38
HTTP port number for SAP Web Dispatcher: 8101
Create configuration for s(mall), m(edium), l(arge) system (default: medium): l
WARNING: Maximum number of sockets supported on this system: 2045
Please check the operating system configuration
Profile "sapwebdisp.pfl" generated
Authentication file "icmauth.txt" generated
Web Administration user is "icmadm" with password "xxxxxxxxx"
Restart sapwebdisp with profile: sapwebdisp.pfl
sapwebdisp started with new pid 14014
Web administration accessible with "http://<hostname>:8101/sap/wdisp/admin/default.html"
SAP Web Dispatcher bootstrap ended (rc=0)
<hostname>47> *** WARNING: Could not start service 8101 for protocol HTTP on host "<hostname>m"(on all adapters)
SAP Web Dispatcher up and operational (pid: 14014) ***
Now, if I use any port other than 8101 for HTTP port number for SAP Web Dispatcher the webdispatcher does not work.
If i use port 8101(which i am using currently) then the webdispatcher does the load balancing however i cannot access the http://<hostname>:8101/sap/wdisp/admin/default.html url
Can anyone help me getting both thigs: load balancing and the webdisp admin page also.
Thanks!!
Regards,
Rohit

Hi Rohit,
this is your Profile File
Generating Profile "sapwebdisp.pfl"
Hostname of Message Server (rdisp/mshost): <hostname>
HTTP Port of Message Server (ms/http_port): 8101
Checking connection to message server...OK
Unique Instance Number for SAP Web Dispatcher (SAPSYSTEM): 38
HTTP port number for SAP Web Dispatcher: 8101
Create configuration for s(mall), m(edium), l(arge) system (default: medium): l
WARNING: Maximum number of sockets supported on this system: 2045
Please check the operating system configuration
Profile "sapwebdisp.pfl" generated
Authentication file "icmauth.txt" generated
Web Administration user is "icmadm" with password "xxxxxxxxx"
Restart sapwebdisp with profile: sapwebdisp.pfl
sapwebdisp started with new pid 14014
Web administration accessible with "http://<hostname>:8101/sap/wdisp/admin/default.html"
You have wrongly configured your HTTP port number for SAP Web Dispatcher make it as 80 by default
Sample Profile File:
Profile generated by sapwebdisp bootstrap
unique instance number
SAPSYSTEM = 1
add default directory settings
DIR_EXECUTABLE = .
DIR_INSTANCE = .
Accessibility of Message Servers
rdisp/mshost = Hostname
ms/http_port = 8101
SAP Web Dispatcher Parameter
wdisp/auto_refresh = 120
wdisp/max_servers = 100
wdisp/shm_attach_mode = 6
configuration for small scenario
icm/max_conn      = 100
icm/max_sockets   = 1024
icm/req_queue_len = 300
icm/min_threads   = 5
icm/max_threads   = 15
mpi/total_size_MB = 20
#maximum number of concurrent connections to one server
wdisp/HTTP/max_pooled_con = 100
wdisp/HTTPS/max_pooled_con = 100
SAP Web Dispatcher Ports
icm/server_port_0 = PROT=HTTP,PORT=80
icm/server_port_1 = PROT=ROUTER,PORT=443
Swapnil

CRS-1 Load balancing issue

Dear all,
I am using a simple load balacing based on static routing, running V 3.8.4.
Although checking route and cef details confirms load balancing is as it should be...load on interfaces is very much apart for outpout traffic (input looks fiine).
load interval and configuraion on each interface is exactely the same, no bundling used.
Any thoughts ?
TIA
Samir

Samir,
The load balancing algorithm used in CRS by default is based on L3, 3 tuple, hash. So if you don't have enough different l3 source/destination addresses you won't see as even distribution. Normally this is just fine. But depending on the traffic flows you have you may need to go to L4, 7 tuple, algorithm. This will then look deeper into the packets and use the L4 ports along with source and destinations addresses to balance out the flows.
To change this it's global config command "cef load-balancing fields l3/l4".
This will change the hashing algorithm used on the linecards for load balancing.
Thanks,
Bryan

SIP load balancing issue with ACE 4710

SIP Load balancing Issue with ACE 4710
I have a Cisco ace 4710 with vesion Version A4(2.2). i configued simple SIP load balancing first without stickiness. without stikeiness we are having a problem because bye packet at the was not going to the same server all the time that left our port in used even though user hang up the phone. its happen randmly. i have a total 20 licenced ports and its fill out very quickly. so i dicided to use the stickiness with call-ID but still same issue. below is the config
rserver host CIN-VOX-31
ip address 172.20.130.31
inservice
rserver host CIN-VOX-32
ip address 172.20.130.32
inservice
serverfarm host CIN-VOX
probe SIP-5060
rserver CIN-VOX-31
    inservice
rserver CIN-VOX-32
    inservice
sticky sip-header Call-ID VOX_SIP_GROUP
timeout 1
timeout activeconns
replicate sticky
serverfarm CIN-VOX
class-map match-all CIN_VOX_L4_CLASS
2 match virtual-address 172.22.12.30 any
class-map match-all CIN_VOX_SIP_L4_CLASS
2 match virtual-address 172.22.12.30 udp eq sip
policy-map type loadbalance sip first-match CIN_VOX_LB_SIP_POLICY
class class-default
    sticky-serverfarm VOX_SIP_GROUP
policy-map multi-match GLOBAL_DMZ_POLICY
   class CIN_VOX_SIP_L4_CLASS
    loadbalance vip inservice
    loadbalance policy CIN_VOX_LB_SIP_POLICY
    loadbalance vip icmp-reply
class CIN_VOX_L4_CLASS
    loadbalance vip inservice
    loadbalance policy CIN_VOX_LB_SIP_POLICY
    loadbalance vip icmp-reply
interface vlan 20
description VIP_DMZ_VLAN
ip address 172.22.12.4 255.255.255.192
alias 172.22.12.3 255.255.255.192
peer ip address 172.22.12.5 255.255.255.192
access-group input PERMIT-ANY-LB
service-policy input GLOBAL_DMZ_POLICY
could you please help me on this...
thanks
Rakesh Patel

I mean there should be one more statement-
class-map type sip loadbalance match-any CIN_VOX_LB_SIP_POLICY
match sip header Call_ID header-value sip:
and that will be called under-
policy-map multi-match GLOBAL_DMZ_POLICY
   class CIN_VOX_SIP_L4_CLASS
    loadbalance vip inservice
    loadbalance policy CIN_VOX_LB_SIP_POLICY
    loadbalance vip icmp-reply
is that missing in your config ?

MulticastTest for Load balancing issue

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