Routing

Hi All !

 

I'm using LDP for all the VPN traffic. I have a special need to setup a "static path" for one specific L3VPN. I know I have to create an LSP (RSVP) and apply a policy. But it seems it will not work in my case because RSVP will be prefer over LDP for ALL the VPNs to that PE destination...

 

is any way to have this working strategy :

FROM vpn_community X

THEN install-nexthop LSP_Y

ELSE LDP

 

I tried to play with this, but it doesn' work...

lab@M120# show policy-options policy-statement LSP-FOR-VPN-GREEN 
term 1 {
    from community L3VPN-GREEN;
    then {
        install-nexthop lsp PE1-TO-PE2;
        accept;
    }
}
term 2 {
    then {
        install-nexthop except lsp PE1-TO-PE2;
        accept;
    }
}

 

 

Thanks for your help !

 

Salah

JNCIE-SP

JNCIE-ENT

 

 

Search for no-install-to-address in the forums

Hi !

 

thanks a lot for your quick reply.

 

I did look your reply http://forums.juniper.net/t5/Routing/LDP-and-RSVP-together/m-p/235912/highlight/true#M11066

 

I tried it and that works ! great !

 

But how I can apply the policy (update nexthop) that match a specific PE AND VPN, if the VPN routes i received come from a RR. From my point of view, I have to apply this filter on the RR (EXPORT to PE1). Any other solution ?

 

thanks

Yes, you can apply the next-hop change at the BGP export policy of the announcing PE.
That's the standard approach.

There are other methods (e.g. tagging with communities and setting the lsp-next-hop at the forwarding table, etc...) but I like them much less...