[c-nsp] MPLS x-connect to router itself

[Peter Rathlev]

On Tue, 2009-10-27 at 18:28 -0200, Rubens Kuhl wrote:
> I was wondering if IOS MPLS routers (ME6500 PFC3C in my case) can
> establish an MPLS x-connect to itself, although it's not the IP
> address of router-id but another loopback address added for this
> purpose.
> 
> The idea here is to avoid converting the port to switchport (MUX-UNI
> allow switchport and MPLS x-connects but not routed interfaces and
> switchport on the same physical interface) and to use the "backup
> peer" resource so if the loopback interface have been shutdown to
> force fail-over the router would then connect to another PE to deliver
> the circuit.
> 
> Lab is currently in use by another scenario, and it would also not
> tell me whether this is an IOS or platform limitation.

As far as I can tell at least the Sup720 PFC3C running SXI1 won't do it:

Router(config)#int gi4/3.1
Router(config-subif)#enc dot 60
Router(config-subif)#exit
Router(config)#int gi4/3.2
Router(config-subif)#enc dot 61 
Router(config-subif)#exit
Router(config-subif)#int lo60
Router(config-if)#ip addr 10.0.0.1 255.255.255.255
Router(config)#int lo61   
Router(config-if)#ip addr 10.0.0.2 255.255.255.255
Router(config)#int gi4/3.1
Router(config-subif)#xconnect 10.0.0.2 10 encapsulation mpls
Local switching to peer address 10.0.0.2 is not supported
Router(config-subif)#do sh run int gi4/3.1
Building configuration...

Current configuration : 62 bytes
!
interface GigabitEthernet4/3.1
 encapsulation dot1Q 60
end

That would have been a very nice thing though. :-)

-- 
Peter