The MPLS-OPS Archive

["roberto" <roberto_narvaez@yahoo.com>]

Aamer -

I'm just turning on simple unicast IP MPLS.  I've looked at cisco's
documentions and it mentions that since P1 is the penultimate hop relative
to CE1's as well as PE1's routes, it should be doing PHP by default.  I've
only turned on MPLS on the PEs and Ps routers via the command: mpls ip on
relevant interfaces.  I'm running OSPF in the core and between PEs and CEs.
No BGP, no RSVP, no tunnels.  Route in questions: "1.1.1.3" directly
connected to CE1.  On P1, theoretically, it should show as "Pop tag" for the
Outgoing tag.

CE1>show ip route
C       172.16.1.0 is directly connected, Serial0
C       1.1.1.3 is directly connected, Loopback1

PE1#show ip route
C       172.16.1.0 is directly connected, Serial0/0
C       1.1.1.100 is directly connected, Loopback1
O       1.1.1.3 [110/49] via 172.16.1.1, 02:37:18, Serial0/0

P1#show mpls forwarding
Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
tag    tag or VC   or Tunnel Id      switched   interface
13003  1003        1.1.1.3/32        0          Se1/0      point2point
13004  Pop tag     1.1.1.100/32      25714      Se1/0      point2point
13047  Pop tag     172.16.1.0/24     3756       Se1/0      point2point


What's going on?  Or cisco just doesn't support PHP?

Thanks,
-Roberto.

----- Original Message -----
From: "Aamer Akhter" <aakhter@cisco.com>
To: "roberto" <roberto_narvaez@yahoo.com>; <mpls-ops@mplsrc.com>
Sent: Wednesday, June 19, 2002 8:23 PM
Subject: Re: [MPLS-OPS]: Penultimate Hop Popping


> robert,
>
> renaming:
> CE1----------PE1--------P1--------P2---------PE2--------CE2
>
>
> something is not right. are you changing the bgp next hop on the PE?
>
> when the PE2 imposes the outer label, what prefix is this label for? (
show ip
> cef vrf <x> <route>). it appears that there may be difference here between
the
> directly connected routes and the CE connected ones.
>
> what label does the PE1 advertise thru RSVP/LDP to P1.
>
> ----- Original Message -----
> From: "roberto" <roberto_narvaez@yahoo.com>
> To: <mpls-ops@mplsrc.com>
> Sent: Wednesday, June 19, 2002 8:00 PM
> Subject: [MPLS-OPS]: Penultimate Hop Popping
>
>
> I'm running MPLS on Cisco 3640s with code 12.2(4)T.  My configuration
looks
> like this:
>
> CE----------PE--------P--------P---------PE--------CE
>
> Questions:
> -Router P should be doing PHP for CE routes but does it only for PE
directly
> connected routes.
>
>
> Does anyone know if there is anything in Cisco IOS that needs to be turned
on
> or IOS versions?
>
> Thanks,
> -Roberto.
>
> roberto_narvaez@yahoo.com
>
>


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