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    Tracing MLD Protocol Traffic

    Tracing operations record detailed messages about the operation of routing protocols, such as the various types of routing protocol packets sent and received, and routing policy actions. You can specify which trace operations are logged by including specific tracing flags. The following table describes the flags that you can include.

    Flag

    Description

    all

    Trace all operations.

    client-notification

    Trace notifications.

    general

    Trace general flow.

    group

    Trace group operations.

    host-notification

    Trace host notifications.

    leave

    Trace leave group messages.

    mtrace

    Trace mtrace packets. Use the mtrace command to troubleshoot the software.

    normal

    Trace normal events.

    packets

    Trace all MLD packets.

    policy

    Trace policy processing.

    query

    Trace MLD membership query messages, including general and group-specific queries.

    report

    Trace membership report messages.

    route

    Trace routing information.

    state

    Trace state transitions.

    task

    Trace task processing.

    timer

    Trace timer processing.

    In the following example, tracing is enabled for all routing protocol packets. Then tracing is narrowed to focus only on MLD packets of a particular type. To configure tracing operations for MLD:

    1. (Optional) Configure tracing at the routing options level to trace all protocol packets.
      [edit routing-options traceoptions]user@host# set file all-packets-traceuser@host# set flag all
    2. Configure the filename for the MLD trace file.
      [edit protocols mld traceoptions]user@host# set file mld-trace
    3. (Optional) Configure the maximum number of trace files.
      [edit protocols mld traceoptions]user@host# set file files 5
    4. (Optional) Configure the maximum size of each trace file.
      [edit protocols mld traceoptions]user@host# set file size 1m
    5. (Optional) Enable unrestricted file access.
      [edit protocols mld traceoptions]user@host# set file world-readable
    6. Configure tracing flags. Suppose you are troubleshooting issues with a particular interface. The following example shows how to flag all events for packets associated with the interface name.
      [edit protocols mld traceoptions]user@host# set flag all | match fe-1/0/1.0
    7. View the trace file.
      user@host> file list /var/loguser@host> file show /var/log/mld-trace
     

    Related Documentation

     

    Published: 2013-11-18

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