[c-nsp] Command to display which LSP a TE tunnel is taking?

James Bensley jwbensley at gmail.com
Thu Oct 13 05:13:43 EDT 2016


On 28 August 2016 at 22:28, Chris Boyd <cboyd at gizmopartners.com> wrote:
> I think I’m missing something, but I can’t find a simple command on a Cisco ASR router to show me what LSP a TE path is taking.  It looks like something like

Firstly, which kind of ASR are you looking at here? ASR9000s or 900s?
I have put output below from ASR900 but ASR9K is similar...

Secondly, do you mean you want to see which explicit path you are
using, I'm a bit confused by the question? Do you just want to see the
end-to-end label values?

If you aren't using any explicit paths of contraint based routing then
you are probably going to be following the IGP shortest path, in which
case you can see in the IGP the LSP path. If are you using explicit
paths you can simply view the explicit path(s):

abr1-cdpfbo.core#show mpls traffic-eng tunnels Tu1119

Name: core:abr1-omnrgt:Tu1119 cid:MPLS... (Tunnel1119) Destination: 10.0.0.11
  Status:
    Admin: up         Oper: up     Path: valid       Signalling: connected
    path option 1, type explicit abr1-cdpfbo_to_abr1-omnrgt (Basis for
Setup, path weight 110)

  Config Parameters:
    Bandwidth: 0        kbps (Global)  Priority: 7  7   Affinity: 0x0/0xFFFF
    Metric Type: TE (default)
    ....
  Active Path Option Parameters:
    State: explicit path option 1 is active
....
  InLabel  :  -
  OutLabel : TenGigabitEthernet0/0/27, 50375
  Next Hop : 10.10.0.65
  RSVP Signalling Info:
       Src 10.0.0.19, Dst 10.0.0.11, Tun_Id 1119, Tun_Instance 9
    RSVP Path Info:
      My Address: 10.10.0.66
      Explicit Route: 10.10.0.65 10.10.0.22 10.0.0.11
....


abr1-cdpfbo.core#show ip explicit-paths name abr1-cdpfbo_to_abr1-omnrgt
PATH abr1-cdpfbo_to_abr1-omnrgt (strict source route, path complete,
generation 6)
    1: next-address 10.10.0.66
    2: next-address 10.10.0.65
    3: next-address 10.10.0.21
    4: next-address 10.10.0.22

Cheers,
James.


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