[c-nsp] How to pass VLAN through router

[Jon Harald Bøvre]

Ideas that might be possible:

If R1 and R2 are MPLS enabled: use EoMPLS
If not MPLS: L2TPv3 could be used between R1 and R2



Jon Harald Bøvre

Sent from my iPad

On 12. feb. 2011, at 18:13, Pavel Dimow <paveldimow at gmail.com> wrote:

> Is this possible at all? I ended in pretty ugly scenario (for a short
> time period I hope) where I must pass VLAN through router (yes router
> not L3 switch). The scenario is:
> 
> SW1-----trunk-----R1-----trunk-----R2-----trunk-----L3SWITCH
> 
> I don't have control over SW1 and R1, but I do know that I have trunk
> from my R2 to other side R1 for sure (I already terminate one VLAN on
> R2). Now, I need somehow to get VLAN from other side (SW1) to L3SWITCH
> where I will setup a SVI.
> 
> Any thoughts? How router behaves considering VLANs? Is it only
> possible to terminate vlan on subinterface and no vlan passing? It is
> logical to me, because router is a router not a switch (in my case R2
> is Cisco ASR). And IF router will pass VLAN over trunk interfaces how
> do I control which VLANs are allowed to pass over which interface?
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