maximum number of VRFs on Nexus 7000

Unanswered Question
Oct 20th, 2009

Hi,

does anybody know what is the maximum number of VRFs supported on Nexus 7000?

I found 200 but I'd like to know if 200 is for the entire switch or for every Virtual Device Context.

Many thanks

Stefano

I have this problem too.
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s-durando Fri, 10/23/2009 - 00:42

Hi Giuseppe,

in the document you posted is written 'VRFs require no license' and there isn't any information about the number of VRFs supported.

I found this in release notes of NX-OS 4.1:

'The Cisco NX-OS software supports a maximum of 200 Virtual Routing and Forwarding instances (VRFs). '

Here is the link:

http://www.cisco.com/en/US/docs/switches/datacenter/sw/4_1/nx-os/release/notes/41_nx-os_release_note.html

I'd like to know if 200 is really the total number of vrfs supported

Regards

Stefano

Giuseppe Larosa Fri, 10/23/2009 - 00:55

Hello Stefano,

I'm sorry for the misleading answer.

you are right a VDC can have multiple VRFs.

However, if only up to 3 VDCs are possible even 200 VRFs per VDC are less then 1024 VRFs on a C6500.

You can create a maximum of three VDCs on a physical device.

http://www.cisco.com/en/US/partner/docs/switches/datacenter/sw/4_2/nx-os/virtual_device_context/configuration/guide/vdc_create.html#wp1179460

the information you are looking for is not clearly stated anywhere.

this low number makes me think this can be the reason.

Hope to help

Giuseppe

leopastor Wed, 12/22/2010 - 01:58

Documentation says different things for different versions, and it seems to be even inconsistent as you can see for Release 5.

You can check Configuration Limist for Release 5 here: http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-os/unicast/configuration/guide/l3_limits.html

Regarding VRFs, this document shows "1000 per system", "250 maximum on each VDC (with 4 VDCs)", and "994 on one VDC (with 4 VDCs)". The last two don´t make any sense to me.

If you look into the VDC Configuration Guide for Release 4, which can be found here: http://cisco.biz/en/US/docs/switches/datacenter/sw/4_0/nx-os/virtual_device_context/configuration/guide/vdc_templates.html#wp1117427, you will find that the minimum and maximum values for VRFs in the default resource template for Cisco NX-OS Release 4 are 16 and 8192 respectively. Resource templates are applied on a per VDC basis, but does not necessarily mean that we still can have those 8192 a couple of times as we create VDCs.

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