I'm migrating a network from an old HP Procurve switch to a Cisco 3550. Simple setup, public and private vlans. Setup a port to be tagged on both vlans on the HP side, and on the cisco end set it to be in trunking mode. The cisco sees the vlans. I'm getting the full table from 'show mac address-table', with the appropriate vlans attached to the appropriate mac addresses.
Things in vlan2 on the HP switch can reach the IP address of the 3550 on vlan2 just fine, vlan2 is solid. However, things in vlan1 on the HP switch cannot reach the IP of the 3550 on vlan1, and anything attached to 3550 on vlan1 ports cannot reach anything on vlan1 on the HP switch. Both switches have all of the correct mac addresses in their layer 2 forwarding table. However, whereas things on vlan2 are consistently reachable and populate the arp table, on vlan1 some things will show up in the arp table, most will not, and none will be pingable. Another symptom I'm noticing is that nothing on vlan1 on the HP switch can see the mac address for the vlan1 interface on the 3550, or of anything attached to vlan1 of the 3550. However, these mac addresses will be in both switches forwarding tables. And likewise, there will be addresses in the forwarding table of the 3550, but somehow the server is unable to get arp resolution for any of those very hosts. Config: ! interface FastEthernet0/48 switchport trunk encapsulation dot1q switchport trunk allowed vlan 1,2 switchport mode trunk ! ! interface Vlan1 description Public ip address 10.0.0.126 255.255.255.128 ! interface Vlan2 description Private ip address 10.0.0.254 255.255.255.128 ! ip route 0.0.0.0 0.0.0.0 10.0.0.1 public#sh interfaces trunk Port Mode Encapsulation Status Native vlan Fa0/48 on 802.1q trunking 1 Port Vlans allowed on trunk Fa0/48 1-2 Port Vlans allowed and active in management domain Fa0/48 1-2 Port Vlans in spanning tree forwarding state and not pruned Fa0/48 1-2 Running Version 12.2(44)SE6. Any suggestions? Thanks, Andy --- Andy Dills Xecunet, Inc. www.xecu.net 301-682-9972 --- _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/