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 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 IP address of
>10.200.1.1.  The WAN link is using a 172.16.10.0 subnet, and does routing
>between 10.0.0.0 and 172.16.10.0 networks.
>
>My question is that will VLAN 100 on LAN # 1 distinguishes from VLAN 100 on
>the LAN # 2?  Can I have 2 different subnets with the same VLAN ID number
>but sitting on 2 separate LANs?  Hosts in the first VLAN 100 should not talk
>to others in the second VLAN 100 without using the routers?  Thanks All!
>
>Thomas




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