VRF Lite with OSPF support on 4948

Unanswered Question
Jun 24th, 2010

Was wondering what is the maximum practical number of per VRF OSPF instances that can be created on 4948s.

I read somewhere that it is unlimited, but doubt that - and worried about the CPU load - we have a 4948 and without anything major on it the CPU utilization has hit ~60% - and this is normal as per TAC!!

Thanks for your help!!!



I have this problem too.
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Reza Sharifi Thu, 06/24/2010 - 18:42

Hi sultan,

There is definitely limitation on the number of VRF that a 4948 supports.  There is even limitation is bigger and more powerful devices ie 6500 with Sup-720-VS which only supports 1024 maximum.  As for high utilization, 60% in not normal if you are not running a lots of service with lots of load on the device.



sultan-shaikh Thu, 06/24/2010 - 18:54

Hi Reza,

Thanks for confirming my understanding.

I wanted to get a feel of practical experience, particularly those from the community who have deployed multiple per vrf ospf instances (I am happy even with 60 instances), and issues - if any. Would've loved to lab this, unfortunately I don't have any 4948 with me at the moment.




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