Re: Max routes in VRF?

If you are talking about SUP720-3BXL, probably not.

You can check current TCAM usage using following command.

sh platform hardware capacity forwarding

Also, you can check maximum values.

show mls cef maximum-routes

If you want to change TCAM partition, use following command from
configuration mode.

(config)#mls cef maximum-routes ?
ip number of ip routes
ip-multicast number of multicast routes
ipv6 number of ipv6 routes
mpls number of MPLS labels

(config)#mls cef maximum-routes ip ?
<1-1007> number of 1K entries

(config)#mls cef maximum-routes ip-multicast ?
<1-503> number of 1K entries

(config)#mls cef maximum-routes ipv6 ?
<1-503> number of 1K entries

(config)#mls cef maximum-routes mpls ?
<1-1007> number of 1K entries

Since global full BGP table is too large - over 280k nowadays -, if you
want to keep it in VRF, single instance will be 280k or so.
That means that if you wants to keep 3 VRFs with full table, it will be
280k * 3 , which is 880k entries.
It is beyond the limit.

Alex

Jacques Allison wrote:
> Would it be possible to run eBGP to multiple upstream ISP from with VRF
> address-family and get all global Internet routes? I would like to know the
> maximum limits of routes within a VRF. I know it would depend on hardware -
> let say it's a SUP720BXL with specs of 1 million routes. would this also fit
> into VRF?
>
> Thanks
> J
>
>
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Received on Thu Jul 02 2009 - 04:12:25 ART