[c-nsp] SNMP for VRF [Lite] ?

[Phil Mayers]

On Tue, 2007-08-07 at 08:18 +0200, Oliver Boehmer (oboehmer) wrote:
> Jeff Kell <> wrote on Tuesday, August 07, 2007 5:07 AM:
> 
> > Is there a quick way to determine if a switch has VRFs enabled via
> > SNMP? 
> > 
> > We have some network monitoring/manipulation procedures that get
> > "broken" when VRFs are enabled.  Logging into the CLI and doing a
> > 'show ip vrf' does the trick, but I am looking for a lightweight
> > SNMP-able variable I can pull from a generic switch (at least down to
> > a 3550) as opposed to the more elaborate MPLS MIBs for the higher-end
> > routers. 
>  
> Have you checked if your platforms support the "MPLS-VPN-MIB", for
> example mplsVpnConfiguredVrfs (1.3.6.1.3.118.1.1.1)?
> 

>From memory, that MIB doesn't appear on 3550 and 3750 switches.

It does appear on 6500s, even in VRF lite, but I believe you have to
have an RD set on one or more VRFs (or maybe it was a later software
upgrade that made it appear)

In any event, the MPLS-VPN MIB is EXTREMELY SLOW to poll, due in large
part to is EXCEPTIONALLY POOR DESIGN.