Step 3: Verify RSVP Interfaces

Purpose

If the RSVP protocol is not configured correctly on the routers in your network, the interfaces cannot signal LSPs.

Action

To verify RSVP interfaces, enter the following JUNOS CLI operational mode command:

user@host> show rsvp interface

Sample Output 1

user@R1> show rsvp interface 

RSVP interface: 4 active

                  Active Subscr- Static      Available   Reserved    Highwater

Interface   State resv   iption  BW          BW          BW          mark

so-0/0/0.0  Up         2   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/1.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/2.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

user@R2> show rsvp interface 

RSVP interface: 5 active

                  Active Subscr- Static      Available   Reserved    Highwater

Interface   State resv   iption  BW          BW          BW          mark

so-0/0/0.0  Up         1   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/1.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/2.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/3.0  Up         1   100%  155.52Mbps  155.52Mbps  0bps        0bps       

user@R3> show rsvp interface 

RSVP interface: 5 active

                  Active Subscr- Static      Available   Reserved    Highwater

Interface   State resv   iption  BW          BW          BW          mark

so-0/0/0.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/1.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/2.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/3.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps 

user@R4> show rsvp interface 

RSVP interface: 5 active

                  Active Subscr- Static      Available   Reserved    Highwater

Interface   State resv   iption  BW          BW          BW          mark

so-0/0/0.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/1.0  Up         1   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/2.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/3.0  Up         1   100%  155.52Mbps  155.52Mbps  0bps        0bps 

user@R5> show rsvp interface 

RSVP interface: 4 active

                  Active Subscr- Static      Available   Reserved    Highwater

Interface   State resv   iption  BW          BW          BW          mark

so-0/0/0.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/1.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/2.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps 

user@R6> show rsvp interface 

RSVP interface: 5 active

                  Active Subscr- Static      Available   Reserved    Highwater

Interface   State resv   iption  BW          BW          BW          mark

so-0/0/0.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/1.0  Up         1   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/2.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/3.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps 

Sample Output 2

user@R6> show rsvp interface 

RSVP interface: 3 active

                  Active Subscr- Static      Available   Reserved    Highwater

Interface   State resv   iption  BW          BW          BW          mark

so-0/0/0.0  Up         1   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/1.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps       

so-0/0/2.0  Up         0   100%  155.52Mbps  155.52Mbps  0bps        0bps 
#so-0/0/3.0 is missing

Sample Output 3

user@host# show rsvp interface    

RSVP not configured

What It Means

Sample Output 1 shows that all interfaces on all routers in the network are enabled with RSVP, including the management interface (fxp0). The output for all routers in the network includes similar information, so we will examine R6 in detail.

R6 has five interfaces enabled with RSVP (Up). Interface so-0/1/1.0 has a single active RSVP reservation (Active resv) that did not change the default subscription percentage of 100 percent (Subscription). Interface so-0/1/1.0 did not assign a static bandwidth (Static BW) to the logical unit and therefore inherited 100 percent of the physical interface rate as the bandwidth available (Available BW) for RSVP sessions. Interface so-0/1/1.0 has no bandwidth assigned (Reserved BW), and no RSVP bandwidth allocation at any single instant in time (Highwater mark).

Sample Output 2 shows that interface so-0/0/3.0 is missing. If you do not configure the correct interface at the [edit protocols rsvp] hierarchy level, the interface cannot signal LSPs, and does not appear in the output for the show rsvp interface command. For more information on configuring MPLS on routers in your network, see Configuring MPLS on a Network.

Sample Output 3 shows that the RSVP protocol is not configured at the [edit protocols rsvp] hierarchy level.