[c-nsp] Connecting remote pops with EoMPLS?

[Phil Mayers]

On 17/03/10 08:05, Andy Saykao wrote:
> Hi All,
>
> Not sure if I'm on the right track but I want to put pc-2 on the same
> ethernet segment (ip subnet) as pc-1. How do I accomplish this? Should I
> be looking at EoMPLs?
>
> Network Topology:
>
> pc-1 ->  switch-1 ->7606-1<--->  7606-2<-- switch-2<-- pc-2
>
> - All the "1' devices are geographically separated from all the "2"
> devices.
> - There is a /30 linking 7606-1 and 7606-2 core routers with each other.
> - MPLS is already running between the 7606's.
> - pc-1 is in vlan 12 with ip 172.16.70.x/24
> - switch-1 and switch-2 are both WS-C3560G
> - switch-1 and switch-2 are in different mst regions.
>
> Is it a matter of creating a SVI with the xconnect config on the 7606's

Not an SVI; a physical interface or sub-int, e.g.

7606-2# conf t
int Gi1/1
   description switch-1
   xconnect <7606-2> <vcid>

...or more likely:

int Gi1/1.100
   description pc-1 on switch-1
   encapsulation dot1q 100
   xconnect <7606-2> <vcid>

HOWEVER you cannot then route vlan 100 on 7606-1 or use it elsewhere. 
It's purely layer2 point-to-point. This is a hardware limitation.


> - but how do I then get the switches to particpate in EoMPLS so that the
> devices connected to the switch ports on switch-1 and switch-2 appear as
> if they are in the same ethernet segment???

The switches don't need to participate. That's the point.