Cisco Tips & Tricks

May 14, 2006

Preventing Jam Processes

Filed under: Router, Technology and Software — ciscotips @ 9:51 am

We have always seen that there are some processes still sitting in the process memory and doing nothing. It is possible, however, for a process to become jammed, thus monopolizing the CPU. This may not be immediately apparent on some high-end routers (e.g. 7500 with VIPs, GSR12K), it will cause misery eventually, and certainly on the shared memory routers. Sometimes it leads to a router slow down and in some worst cases we are not able to telnet the router.

We can use following commands to prevent processes from jamming the CPU.

1) scheduler process-watchdog hang :-

This command will place the hung processes in the memory but will not schedule it for processing (CPU).

2) scheduler process-watchdog reload:-

This is “not recommended” option, as this will reload the router. But keep in mind in case router is already in unstable state it’s always better to Reload the router.3)

3)scheduler process-watchdog terminate:-

This will terminate the processes in continued operation of the router. It can also lead to a termination of some key processes which can lead to some adverse affects.

Conclusion: – These are pretty helpful commands for terminating dead processes but my suggestion out here is that use these commands will full caution.

Advertisements

Leave a Comment »

No comments yet.

RSS feed for comments on this post. TrackBack URI

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Blog at WordPress.com.

%d bloggers like this: