[c-nsp] forced path MPLS tunnel question

[Gert Doering]

Hi,

On Tue, Jan 17, 2012 at 11:34:08AM +0100, Vitkovsky, Adam wrote:
> Question #1:
> Yes you can use "verbatim" keyword in the path option
> -router will attempt to build the tunnel without checking the te-lsdb

Tried that, doesn't work.  Some bits are missing :-)

Cisco-M-LAB#sh mpls traffic-eng tu

Name: Cisco-M-LAB_t100                    (Tunnel100) Destination: 194.97.129.65
  Status:
    Admin: up         Oper: down   Path: not valid   Signalling: Down
    path option 1, type explicit (verbatim) FOO

  Config Parameters:
    Bandwidth: 0        kbps (Global)  Priority: 1  1   Affinity: 0x0/0xFFFF
    Metric Type: TE (default)
    AutoRoute: enabled  LockDown: disabled Loadshare: 0 [0] bw-based
    auto-bw: disabled

  History:
    Tunnel:
      Time since created: 13 minutes, 36 seconds
      Number of LSP IDs (Tun_Instances) used: 63
    Path Option 1:
      Last Error: RSVP:: Could not add RSVP Path: Operation failed


the explicit-path configured lists the loopback interfaces of all the
routers I want the tunnel to touch, in sequence, with no gaps.  Labels for
the loopbacks are there, as for the endpoint:

Cisco-M-LAB#sh ip cef 194.97.129.65
194.97.129.65/32
  nexthop 194.97.148.110 Vlan735 label 120


RSVP is not configured anywhere - which, combination with the error
message, hints at "this might be the problem"... 

Also, "mpls traffic-engineering tunnels" is NOT configured on the other
P routers in the network, just on my lab router so far.  Do I need that
(and "what exactly does that command *do*")?

Anyway.  Tried enabling "mpls traffic-eng tunnels" on the next-hop router,
and "debug ip rsvp" on the lab router now tells me:

Jan 17 14:55:32: RSVP: 194.97.129.95_135->194.97.129.65_100[194.97.129.95]: Target of routing lookup (194.97.129.71) is strict but not adjacent (2)

which confuses me a bit - 194.97.129.71 *is* the next-hop router, so why
wouldn't it be adjacent?  LDP at least thinks it is...

Cisco-M-LAB#sh mpls ldp nei
    Peer LDP Ident: 194.97.129.71:0; Local LDP Ident 194.97.129.95:0
        TCP connection: 194.97.129.71.646 - 194.97.129.95.42181


Hrm.

gert


-- 
USENET is *not* the non-clickable part of WWW!
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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