[c-nsp] ldp-igp

[Marlon Duksa]

Thanks Mat. That helps a lot.
But is there any way to select IP instead MPLS for forwarding witout ACLs.
Say that route x.x.x.x is received by OSPF and LDP (FEC mapping). Is there
any way to enable forwarding only on IP and not MPLS for that particular
route without ACLs. For example, changing preference (or administrative
cost) of OSPF to a lower value than LDP - something like that but on a per
interface basis. Or changing preference of LDP to a higher value on a global
basis. Juniper for example can change preference of LDP.

Thanks again,
Marlon



On Sun, Nov 23, 2008 at 2:19 AM, Mateusz Błaszczyk <blahu77 at gmail.com>wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Marlon,
>
> > Hi - Does anyone know how LDP and IGP forwarding on 7600 series can be
> > separated?I have OSPF as IGP and also LDP is advertising the same routes
> > from the neighbors.
>
> well, LDP advertises label to FEC bindings, not routes
>
> > It looks like that Cisco selects only MPLS (LDP based) forwarding path.
> How
> > can I tell to use IP forwarding for some routes and MPLS for other.
> > No RSVP (MPLS-TE) is enabled.
>
> The default behaviour is to advertice label to FEC bindings for ALL
> iGP learnt IPv4 prefixes. So:
>
> first disable the default behaviour
>
> R1(config)#no mpls ldp advertise-labels
>
> Then set for what PREFIXes advertise the labels to what PEERs
>
> R1(config)#mpls ldp advertise-labels ?
>  for        Access-list specifying controls on destination prefixes
>
> R1(config)#mpls ldp advertise-labels for ?
>  WORD  IP access-list for destination prefixes; name or number (1-99)
>
> R1(config)#mpls ldp advertise-labels for PREFIXes ?
>  to  Access-list specifying controls on LDP peers
>
>
> R1(config)#mpls ldp advertise-labels for PREFIXes to PEERs
>
>
> > When I run show ip route, only IP routes are shown. show mpls forwarding
> > shows only MPLS routes. Is there any way that I can pick one vs the other
> > for forwarding? How can I tell from a 'show ' command which one is used?
>
> "show ip cef PREFIX detail" will tell you if there are any MPLS labels
> attached to the IPv4 packet, when it will be send to the PREFIX
> destination.
>
> BRs,
>
> - -mat
>
> - --
> pgp-key 0x1C655CAB
>
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.6 (GNU/Linux)
>
> iD8DBQFJKS5R+BuaDRxlXKsRAnf7AJ9vFZRvWLtcyqciGycBgs9VqAiLeQCfRq9c
> WGeXQApGzTErB16stzca/Pg=
> =7LoB
> -----END PGP SIGNATURE-----
>