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, first 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]user@host# edit routing-options traceoptionsuser@host# set file all-packets-traceuser@host# set flag all
  2. Configure the filename for the MLD trace file.
    [edit]user@host# edit protocols mld traceoptionsuser@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 problems 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 Topics

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