Configuring IGMP Snooping Trace Operations

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.

You can configure tracing operations for IGMP snooping globally or in a routing instance. The following example shows the global configuration.

To configure tracing operations for IGMP snooping:

1. Configure the filename for the trace file.
   [edit]user@host# edit bridge-domains domain1 protocols igmp-snooping traceoptionsuser@host# set file igmp-snoop-trace
2. (Optional) Configure the maximum number of trace files.
   [edit]user@host# set file files 5
3. (Optional) Configure the maximum size of each trace file.
   [edit]user@host# set file size 1m
4. (Optional) Enable unrestricted file access.
   [edit]user@host# set file world-readable
5. Configure tracing flags. Suppose you are troubleshooting problems with a policy related to received packets on a particular logical interface with an IP address of 192.168.0.1. The following example shows how to flag all policy events for received packets associated with the IP address.
   [edit]user@host# set flag policy receive | match 192.168.0.1
6. View the trace file.
   user@host> file list /var/loguser@host> file show /var/log/igmp-snoop-trace

Related Topics

• Junos OS Tracing and Logging Operations
• Configuring IGMP Snooping