[c-nsp] Maximum number of OSPF instances in a VRF-liteenvironment

[Oliver Boehmer (oboehmer)]

Mark Tinka <> wrote on Wednesday, October 08, 2008 8:22 AM:

> On Wednesday 08 October 2008 11:40:53 McLean Pickett wrote:
> 
>> Are there any Cisco guidelines or does anyone have any
>> hands-on experience with the maximum number of VRF's\OSPF
>> instances in a VRF-lite deployment?
> 
> At the time I first read about l3vpn's (a couple of years
> back), Cisco said the RDB (Routing Descriptor Block)
> supported only 32 instances (including the defaults, i.e.,
> Static, Connected and IGP).
> 
> But I should say that this was a fairly old IOS at the time
> (and different/older platform too), plus we never did quite
> have OSPF-based VRF's, so I can't claim with full certainty
> that this holds true today.

right, this got changed in 12.3(4)T, 12.0(27)S, 12.2(25)S, 12.2(18)SXE
and others where IOS no longer allocates a PDB per OSPF vrf instance, so
you are not limited by the 32 PDB instances any longer..

	oli