Hello,
I have a strage Layer 2 path between 2 switches.
Switch A - a 3550 running Version 12.2(44)SE - ospf routing
Siwth B - a 3750 running 12.2(55)SE3 - no routing protocol, no default gateway
There is a layer 2 trunk connection (ethercahnnel) between them, all Vlans allowed.
Both switches have Vlans 74 and Vlan 562
Host 1 connected to Switch A on vlan 562 with ip address 10.74.1.1
Host 2 connected to Switch B on vlan 562 with ip address 10.74.1.2
When I run: traceroute mac ip 10.74.1.1 10.74.1.2 the traffic goes via interface Vlan 74 (which has an ACL on it and blocks some traffic)
My question is:
Why is the Layer 2 path goes outside Vlan 562 and via Vlan 74 ?
Could it be related to the fact that all the Layer 3 Vlan interfaces on Switch A have the same mac address (a bug in that Ios version)?