troubleshooting Question

NLB Cisco Switch Issue

Avatar of colinkhan
colinkhan asked on
Networking ProtocolsWindows NetworkingNetwork Architecture
6 Comments2 Solutions2144 ViewsLast Modified:
Here is the scenario: Have 2 virtual servers on Hyper V with 1 virtual IP assigned to the NLB cluster. Cluster is running in multicast mode. The two physical ports are connected to a Catalyst 3750 which is daisy chained of another 3750 which is in turn connected to a trunk port on a 6500 Catalyst. The catalyst has numerous vlans of which the NLB machines are a member of VLAN1.
If I connect to a machine on the same VLAN as the NLB server we can communicate via ping fine. Problem is no other vlans can communicate with the NLB IP. Note that there are no security restrictions between the vlans and the other vlans can ping "normal" IPs in the NLB vlan no problem.
Followed the instructions here:

I did this config on the edge switch where the physical ports are located but this does not work.
What gives? Do I need to do this somewhere else or on the 6500?

If on the 6500 how do I define the ports that the NLB IP is assigned to?

Robert Sutton Jr
Senior Network Manager

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Join our community to see this answer!
Unlock 2 Answers and 6 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 2 Answers and 6 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros