NLB with cpq teaming running Apache Tomcat

[stephen daly]

Hi all,
I have following config, 3 Advanced servers each having
2 NICs (teamed) using NLB in multicast mode with latest
service packs. We are using Apache Tomcat, which needs to
use multicast to replicate sessions between members. I
can't get any multicast app to work with the above config
(using multicast test -
http://www.mycgiserver.com/~skybuck).
If I disable the NLB, multicast works. The IP's are
virtual-172.26.30.30, a-172.26.30.21, b-172.26.30.22, and
c-172.26.30.23 all with a class c mask.
Is the above config supported when using other multicast
apps? I have read that if you have the above config that
it's best to have the virtual IP and real IPs on different
subnets, or breaking the teaming and changing subnets? Any
help would be appreciated

Regards and thanks,
-Stephen

 

[Marc Reynolds [MSFT]]

The first step in troubleshooting NLB in a teamed NIC scenario is to get
rid of the NIC teaming and test. Often the teaming software conflicts with
NLB.

Thanks,
Marc Reynolds
Microsoft Technical Support

This posting is provided "AS IS" with no warranties, and confers no rights.
--------------------

 

[Guest]

Thanks Marc, but the Team was disabled and the servers
where left with one nic with one IP address. When the
network load balancing was turned off multicasts where
sent and recieved by all servers. Its a problem with
NLB and multicasting.
We are looking at another option to load balance the
servers.

Thanks
-Stephen