Hi, I noticed mismatch VLAN 1 in mikrotik and VLAN 1 in 3Com 5500G-EI.
I have 5 swishes 3com which is communicated in star with ip addresses in interface VLAN 1. When I put mikrotik CRS212 between two 3com switches and add vlan 1 tagged in mikrotik, I have no ping.
When add and enable VLAN 0 in mikrotik all is all right and ping is ok.
Is there entanglement or mismatch VLAN 0 and VLAN 1?