I have 2 core routers connected toegther via a 6509.
on R2, I placed 2 loopbacks, one of them pings fine from R1, the other does not. routing parameter are exactely the same.
then I noticed on my 6509 the following error message, coudl this be teh explanation ? teh second(bad) Loopback represents a new range added to our network and my concern is that we have exhausted out cef tags.
Oct 25 06:33:09: %MLSCEF-SP-7-FIB_EXCEPTION: FIB TCAM exception, Some entries will be software switched
so in this case, I dont even dare to reload as the bad IP range might start working but other good ones will stop depending on which comes 1st.
The othert explanation coudl be CPU spikes...but why only for the badrange ?
The error message indicates that some packets would be software switched. This would impact CPU load but would not prevent connectivity. So I think that you need to look for a different problem.
Your first posting just said that the second loopback did not ping fine. Can you be more specific about the problem? Can you ping it at all? Can you traceroute to it? Is there perhaps an access list involved which impacts it?
Perhaps you could post the configuration of both loopbacks and the configuration of your routing, and the output of show ip route on the second router? If we had more information to work with perhaps we could find the problem.
The new configurations are applied after a system reload only and do not take effect if a switchover occurs.
In RPR mode, if you change and save the maximum-routes configuration, the redundant supervisor engine reloads when it becomes active from either a switchover or a system reload. The reload occurs 5 minutes after the supervisor engine becomes active.
Use the show mls cef maximum-routes command to display the current maximum routes system configuration.
This example shows how to set the maximum number of routes that are allowed per protocol:
Router(config)# mls cef maximum-routes ip 100
This example shows how to return to the default setting for a specific protocol:
Router(config)# no mls cef maximum-routes ip
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