[j-nsp] a simple interface setup question and something regarding layer-2 vpn

[Chuck Anderson]

On Tue, Jul 01, 2008 at 04:47:34PM -0400, CHEN Xu wrote:
> Hi folks,
> 
> I have a stupid question regarding interface setup in juniper configuration.
> 
> interfaces {
>   fe-0/1/0 {
>     unit 0 {
>       family mpls;
>     }
>   }
> }
> 
> protocol {
>   mpls {
>     interface fe-0/1/0.0
>   }
> }
> 
> What are the exact effect of the above two snippets?

For M-series, the first snippet tells the B-chip on the FPC to accept 
frames with MPLS L2 headers rather than discard them.

The second snippet actually allows the MPLS protocol to run on the 
logical interface.

> Another question, regarding layer-2 vpn. I first got l2vpn working on
> two physical routers. And then I tried to have an exact same setup but
> on one single physical router, using a bunch of logical routers, of
> coz. I failed to get it working for some reason. Is there a problem
> that may happen when I squeeze everything to one physical router?

Not sure, I haven't played with VPNs on LRs yet.