VLAN identity [7:58559]

2002-12-04 Thread Thomas N.
Hi All, I am wondering if the VLAN number is valid locally on a LAN only or it goes across the WAN link? In my scenario, I have two LANs separated with 2 WAN routers. On the LAN # 1, I assign a VLAN 100 with IP address (gateway) of 10.100.1.1. On LAN # 2, I assign another VLAN 100 but with an I

RE: VLAN identity [7:58559]

2002-12-04 Thread s vermill
Unless you're doing some kind of bridging or IRB, this won't be a problem. Even then, I'm not sure it would necessarily be a problem. In a "normal" topology, VLANs are locally significant. Thomas N. wrote: > > Hi All, > > I am wondering if the VLAN number is valid locally on a LAN > only or

Re: VLAN identity [7:58559]

2002-12-04 Thread Larry Letterman
Not unless the routers were using trunking and it does not sound like they are... The L3 links to each lan switch dont know anything about the vlan . Larry Thomas N. wrote: >Hi All, > >I am wondering if the VLAN number is valid locally on a LAN only or it goes >across the WAN link? In my sce

Re: VLAN identity [7:58559]

2002-12-04 Thread s vermill
Larry Letterman wrote: > > Not unless the routers were using trunking and it does not > sound like > they are... > The L3 links to each lan switch dont know anything about the > vlan . > > Larry > Larry, Just curious... Can VLANs be bridged over a bridge group that includes serial WAN connect

Re: VLAN identity [7:58559]

2002-12-04 Thread Larry Letterman
I would think that you can bridge them with IRB/CRB but the vlan id would not be an issue since the connections are not using isl/dot1q trunking. You would basically be making a flat network across the wan links. The vlan information will only propagate across trunk links that pass the vlan id

Re: VLAN identity [7:58559]

2002-12-05 Thread Thomas N.
Hi Larry, I am using trunking on the LAN side of the routers to route between VLANs. However, WAN interfaces of these routers are not configured as trunk. The WAN link is just connected using a different subnet. And no, I don't use bridging. So if VLAN is just local significant, should it not b

Re: VLAN identity [7:58559]

2002-12-05 Thread Larry Letterman
Correct, The 2 lans across the wan are nothing more than 2 networks with layer 3 router connections connecting them together. The vlan's are only significant at the local lan level to the host in the switch. Larry Thomas N. wrote: >Hi Larry, > >I am using trunking on the LAN side of the rout