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Debug Commands

Release 11.2 GS

debug mbus system

To enable the display of low-level mbus messages, use the debug mbus system EXEC command.

Use the no form of the command to disable debugging output.

[no] debug mbus system

Usage Guidelines

This command ﬁrst appeared in Cisco IOS Release 11.2 GS.

The debug mbus system command is useful for low-level debug of the MBus system.

Enable the debug mbus system command if you are getting a lot of MBus errors. Additional

information can be obtained with the show mbus counters and show mbus can-error commands.

Enabling the debug mbus system command typically displays the CAN message that generated the

error condition. The debug mbus system is usually restricted to developers. MBus errors typically

manifest as errors in the applications running over the MBus. You can enable debug for that

particular application to get more information (for example, debug gsr mbus is one such application

debug).

Sample Display

Figure 3 shows sample output from the debug mbus system command. In this example, the ﬁrst

packet of a new message was received from a selected slot/stream combination while there was

already a message in progress. The previous message remains incomplete and is dropped. The MBus

system software allows only one message to be sent from a particular slot/stream combination at any

given instant.

Figure 3 Sample Debug MBus System Output

router# debug mbus system

Reassembly error; incomplete message:

C8 02 80 01 11 08 01 00 01 00 00 00

1 2 ... 55 56 57 58 59 60

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Cisco 12012 Technical Information Seite 60