Enabling Trace Messages for IGMP Layer 2 Querier Troubleshooting
If the preceding information does not address your issue, you can also use the following trace command to view additional information related to Layer 2 querier.
Caution
Using the trace tool inappropriately can cause primary CPU lockup conditions, loss of access to the device, loss of protocols, and service degradation. If you use trace level 3 (verbose) or trace level 4 (very verbose), do not use the screen to view commands due to the volume of information the system generates and the effect on the system.
Procedure
Variable Definitions
Use the data in the following table to use the trace command.
Variable |
Value |
---|---|
level [<Module_ID>] [<1–4>] |
Starts the trace by specifying the module ID and level. Module ID 23 represents the IGMP module <Module_ID> specifies the module for the trace. Different hardware platforms support different ID ranges because of feature support differences. To see which module IDs are available on the switch, use the show trace modid-list command or CLI command completion Help. <0-4> specifies the trace level:
|
shutdown |
Stops the trace operation. |
screen {disable|enable} |
Enables or disables the display of trace output to the screen. Important:
Avoid using the screen to view commands if you use trace level 3 (verbose) or trace level 4 (very verbose) due to the volume of information generated and the effect on the system. |
Use the data in the following table to use the show trace command.
Variable |
Value |
---|---|
file [tail] |
Displays the trace results saved to a file. |
level |
Displays the current trace level for all modules. |
modid-list |
Specifies the module ID list. |