Hadrware load balancing for WLS 5.1

Rather than using the proxy plug-in to determine which server to dispatch a request to in case of failover, I would like to use hardware load balancer. So on normal conditions, the load-balancer would look at the primary server in the cookie and route the request accordingly. If it gets no response, it would reexamine the cookie and forward the request to the secondary server holding the state.
          Has anybody done this? Which hardware load balancer were you using? Is there a definitive spec for the weblogic cookie so that we can try configuring the load balancer? (in the BEA docs I can only find info about the position of the primary server in the cookie).
          Thanks, Matt

http://e-docs.bea.com/wls/docs60/cluster/servlet.html#1008984
 -- Anand
 "Mark Vaughn" <[email protected]> wrote in message
 news:[email protected]...
 >
 > Even with WLS 6.1, how will the hardware load balancer know who the
 secondary server
 > is when it needs to failover a session? For example, in a 3 member
 cluster, when
 > server one dies, how does the HLB know whether server 2 or server 3 were
 defined
 > as the secondary for that session. Unless something has changes in WLS6.1,
 there
 > is only one primary and only one secondary.
 >
 > Matt, I use Foundry ServerIrons to load balance my iPlanet webservers, but
 I strongly
 > suggest the Weblogic plugin if you will be using a 3rd party webserver in
 front
 > of WebLogic. That plugin has all kinds of debug settings and extra
 features that
 > allow it to communicate with the background WLS cluster. That allows it to
 make
 > decisions and deliver performance no HLB will give you. Don't get me
 wrong, HLB's
 > have there place and deliver some really good features, but that is not a
 place
 > I would consider using one.
 >
 >
 > Kumar Allamraju <[email protected]> wrote:
 > ><!doctype html public "-//w3c//dtd html 4.0 transitional//en">
 > ><html>
 > >Hi:
 > >WLS 5.1 clustering is not designed to work with Hardware load
 balancers.
 > > I would suggest you to try with WLS 6.1
 > >--
 > > Kumar
 > >Matt Hudson wrote:
 > ><blockquote TYPE=CITE>Rather than using the proxy plug-in to determine
 > >which server to dispatch a request to in case of failover, I would like
 > >to use hardware load balancer. So on normal conditions, the load-balancer
 > >would look at the primary server in the cookie and route the request
 > >accordingly.
 > >If it gets no response, it would reexamine the cookie and forward the
 > >request
 > >to the secondary server holding the state.
 > >Has anybody done this? Which hardware load balancer were you
 > >using?
 > >Is there a definitive spec for the weblogic cookie so that we can try
 > >configuring
 > >the load balancer? (in the BEA docs I can only find info about the
 position
 > >of the primary server in the cookie).
 > >Thanks, Matt</blockquote>
 > ></html>
 > >
 >

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          > cfraser
          > ----------
          > C h r i s t o p h e r A . F r a s e r
          > Director, Technology
          > macroplay.com, Inc.
          > [email protected]
          >
          > Viresh Garg wrote:
          >
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          > >
          > > front-ending your Weblogic cluster
          > >
          > > These proxies/plug-ins are smart to do a lot of things like:
          > >
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          > > -- Adding/deleting servers dynamically in cluster when the servers
          > > join/leave Weblogic cluster
          > > -- failover to secondary when primary dies.
          > >
          > > As far as the information about primary and secondary is concerned it is
          > > available in session ID.
          > >
          > > --Viresh Garg
          > >
          > > Chris Fraser wrote:
          > >
          > > > I've got a load balancer in front of my WLS cluster, and I'm trying to
          > > > set up load balancing based on WLS clustering. What I need to know to
          > > > do this is the offset within the cookie that's responsible for
          > > > determining which machine within the cluster to direct to.
          > > >
          > > > Any idea how I can get this information?
          > > >
          > > > thanks,
          > > > cfraser

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I hope this helps!
Thank you for rating helpful posts!

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Thnx,
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Hi,
I have CSS configured in single arm and I have multiple servers configured for load balancing and it is working fine but when I am configuring Exchange server for load balancing I am facing problem and applications and printer/scanners are not able to send the email through the Virtual IP address configured for exchaneg server.
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Name:                EXCHANGE   Owner:                ENOC_GIT
State:                 Active   Type:                     HTTP
Balance:          Round Robin   Failover:                  N/A
Persistence:          Enabled   Param-Bypass:         Disabled
Session Redundancy: Disabled
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=============================================================================
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Kindly assist me

Hi
Printers are on Vlan 80 ( gw is 192.168.80.1) and exange server is on vlan 200 (gw is 192.168.200.1) i have multiple vlan which will communcate with exchange.
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Please assist
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Hadrware load balancing for WLS 5.1

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