Step 2: Verify RSVP Sessions

Purpose

When an RSVP session is successfully created, the LSP is set up along the paths created by the RSVP session. If the RSVP session is unsuccessful, the LSP does not work as configured.

Action

To verify currently active RSVP sessions, enter the following command from the ingress, transit, and egress routers:

user@host> show rsvp session

Sample Output 1

user@R1> show rsvp session 

Ingress RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

Egress RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

Transit RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

user@R3> show rsvp session 

Ingress RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

Egress RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

Transit RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

user@R6> show rsvp session 

Ingress RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

Egress RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

Transit RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

Sample Output 2

user@R1> show rsvp session 

Ingress RSVP: 1 sessions

To              From            State Rt Style Labelin Labelout LSPname 

10.0.0.6        10.0.0.1        Up     1 1 FF       -   100768 R1-to-R6

Total 1 displayed, Up 1, Down 0

Egress RSVP: 1 sessions

To              From            State Rt Style Labelin Labelout LSPname 

10.0.0.1        10.0.0.6        Up     0 1 FF       3        - R6-to-R1

Total 1 displayed, Up 1, Down 0

Transit RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

user@R3> show rsvp session 

Ingress RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

Egress RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

Transit RSVP: 2 sessions

To              From            State Rt Style Labelin Labelout LSPname 

10.0.0.1        10.0.0.6        Up     1 1 FF  100784        3 R6-to-R1

10.0.0.6        10.0.0.1        Up     1 1 FF  100768        3 R1-to-R6

Total 2 displayed, Up 2, Down 0

user@R6> show rsvp session      

Ingress RSVP: 1 sessions

To              From            State Rt Style Labelin Labelout LSPname 

10.0.0.1        10.0.0.6        Up     1 1 FF       -   100784 R6-to-R1

Total 1 displayed, Up 1, Down 0

Egress RSVP: 1 sessions

To              From            State Rt Style Labelin Labelout LSPname 

10.0.0.6        10.0.0.1        Up     0 1 FF       3        - R1-to-R6

Total 1 displayed, Up 1, Down 0

Transit RSVP: 0 sessions

Total 0 displayed, Up 0, Down 0

What It Means

Sample Output 1 from all routers shows that no RSVP sessions were successfully created, even though the LSP R6-to-R1 is configured. Continue investigating the problem in Verify RSVP Neighbors.

In contrast to Sample Output 1and to illustrate correct output, Sample Output 2 shows the output from the ingress, transit, and egress routers when the RSVP configuration is correct, and the LSP is traversing the network as configured. R1 and R6 both show an ingress and egress RSVP session, with the LSP R1-to-R6, and the reverse LSP R6-to-R1. Transit router R3 shows two transit RSVP sessions.