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Configure RSVP Tracing


To configure a log file and specify RSVP tracing flags, follow these steps:

  1. In configuration mode, go to the following hierarchy level:
    [edit]user@host# edit protocols rsvp
  2. Configure a log file:
    [edit protocols rsvp]user@host# set traceoptions file filename
  3. Depending on your situation, specify the appropriate RSVP-specific tracing flag from Table 1. For example:
    [edit protocols mpls]user@host# set traceoptions flag path detail
  4. Verify and commit the configuration:
    user@host# show user@host# commit

Sample Output

user@R1> edit 
Entering configuration mode

user@R1# edit protocols rsvp

[edit protocols rsvp]
user@R1# set traceoptions file rsvp-log

[edit protocols rsvp]
user@R1# set traceoptions flag error detail

[edit protocols rsvp]
user@R1# set traceoptions flag path detail

[edit protocols rsvp]
user@R1# set traceoptions flag pathtear detail

[edit protocols rsvp]
user@R1# show
traceoptions {
    file rsvp-log;
    flag error detail;
    flag path detail;
    flag pathtear detail;
interface so-0/0/2.0;
interface fxp0.0 {

[edit protocols rsvp]
user@R1# commit 
commit complete


The sample output shows the configuration of RSVP tracing on ingress router R1. The log file rsvp-log contains all the information gathered for the configured flags. In the sample output, three flags are configured: error, path, and pathtear. All flags are configured with the detail option. Each flag that you configure provides slightly different information about RSVP traffic. The error flag traces all detected error conditions, the path flag traces all Path messages, and the pathtear flag traces PathTear messages. The detail option shows granular details about the flag included in the configuration.

Note: Use the tracing flags detail and all with caution. These flags may cause the central processing unit (CPU) to become very busy.

Table 1 shows the tracing flags you can configure at the [edit protocols rsvp traceoptions] hierarchy level.

Table 1: RSVP Tracing Flags




All tracing operations


All detected error conditions


RSVP-related events


RSVP-LMP interactions


All RSVP packets


All Path messages


PathTear messages


Resv messages


ResvTear messages


Routing information


Session state transitions

For information about examining an RSVP log file, seeChecklist for Examining RSVP Log Messages and Checklist for Examining RSVP Error Messages.

Published: 2010-01-30

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