> Chris, > > Could you elaborate on: > > Just need to be careful to bridge the VLAN across the trunk link as > necessary. (i.e. only bridge what you need - switch to switch - don't use > 'vlan members all'). > What would be the problem if I did all? I might have say tag 2001 going to a > switch that doesn't play on that vlan, but I wouldn't have problems > necessarily would I? > > Thanks, > Morgan >
You're right. It wouldn't necessarily be an issue. What I'm trying to avoid is bridging VLAN 2001 everywhere (and we're back to the original '1 giant LAN' problem). Switch 1 <> Switch 2 uses VLAN 2001 Switch 2 <> Switch 3 uses VLAN 2002 Switch 3 <> Switch 1 uses VLAN 2003 All inter-switch links declared 'family ethernet switching port-mode trunk members vlan all'. Agreed, if switch 3 doesn't have tag 2001 declared, it'll just ignore it / not pass it back to switch 1. However, if you're using a base RSTP topology (VLAN unaware), then one of those inter-switch links is going to block. You will not have routing/IP connectivity on one of the inter-switch links. However, this is not necessarily a problem.... If RSTP blocks between a pair of switches, OSPF will just lose the inter-switch adjacency - but not reachability of each switch in the OSPF database (The Type 1's are all still there). The traceroute simply follows the current RSTP forwarding topology. - Chris. _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
