[f-nsp] VLL, VPLS and the point of configuring LSP's

[Eric Helm]

On 5/10/2012 4:02 PM, Remco Bressers wrote:
> Dear list,
> 
> At first, excuse my ignorance. I'm trying to get used to configuring MPLS on Brocade MLX/XMR series and all is working fine, but after reading through the manual i still have a question that is unanswered at the moment.
> We are operating a network of 4 XMR routers in a ring topology with routed interfaces pointing to each-other. On these interfaces, i enabled ldp as follows :
> 
> router mpls
>  policy
>   traffic-eng ospf
>   mpls-interface ve9
>   ldp-enable
>   mpls-interface ve92
>   ldp-enable
> !
> 
> Local, and remote VLL's are working perfectly. The manual is referring to configuring LSP's which you then use in the VPLS or VLL configuration to determine your path (vpls). I never used that before and it still is working. What is the actual advantage of configuring LSP's and using them in your VLL or VPLS configuration? I don't seem to understand it fully. If someone can explain it in a more basic way, i'd be very grateful.
> 


Traffic Engineering. LDP uses the IGP for path selection. TE using
manually defined LSPs can have explicitly defined paths among other
attributes/features.

/Eric