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New Member

Inter-VRF Routing / MP-BGP on 3750G


I've got a requirement to do Inter-VRF routing (need MP-BGP) using a private AS Number on a stack of 7 x 3750G's, my question ultimately is the performance overhead of doing such a change.

The stack will have no more than 300-400 routes even with the duplicates invoked from doing VRF leaking so I can't see much of an issue myself, we already have 2 VRF's and OSPF running in each VRF just don't have MP-BGP to do the VRF leaking.

Ultimately there will be about 4-5 VRF's (I know there's a Software limit of 26 VRF's on a 3750G).

Anyone have any experience of this?


  • LAN Switching and Routing
Everyone's tags (4)
VIP Super Bronze

Re: Inter-VRF Routing / MP-BGP on 3750G


With 4-5 vrfs and address family statements, you should be just fine.

I have a done it with 3, and no impact on the switch.

Good Luck


New Member

Re: Inter-VRF Routing / MP-BGP on 3750G

Excellent, that's a massive help I was a little worried about performance impact.

Since we updated to 12.2(55) we now get 100% CPU spikes when showing running config or writing to flash.

Seems a little out of the ordinary, but according to Cisco docs can be expected.


VIP Super Bronze

Re: Inter-VRF Routing / MP-BGP on 3750G

You should not get that high of CPU spike. That in not normal . I would open a ticket with TAC and if no results load a different IOS version.


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