Hello, we seem to have an issue regarding behaviour on 3750 vs 6500 series switches, and wonder if anyone can help.
At a previous location, each 1 of 3 servers srv001a/b/c had a network connection into 2 separate Cisco 3570 switches, and these connections were teamed at the server using HP's network configuration tool. Each of these teamed connections across all 3 servers were then clustered together using Microsoft's Network Load Balancing to provide a single IP address for the virtual server srv001.
When we moved the servers to a new location and plugged the NICs into the 2 separate Cisco 6500 series switches, we found that the virtual IP address was only contactable from the same VLAN (and it may in fact have only been the same VLAN on one of the 6500 switches).
The only way we have managed to make the clustered IP address (192.168.x.y) generally reachable was by shutting down the ports for the teamed NICs on one of the switches, and adding a manual arp entry for the clustered IP on both switches:
[...rest of config...]
arp 192.168.x.y 03bf.c0xx.yyzz ARPA
Does anyone have any idea what differences between the 3750s and 6500s might explain this behaviour?