maximum number of VRFs on Nexus 7000

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Oct 20th, 2009
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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

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Giuseppe Larosa Fri, 10/23/2009 - 00:24
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Hello Stefano,


I would say at least 1024 VRFs as a Cisco 6500


there are license requirements as explained here.


It may be equal to VDC contexts number


see

http://www.cisco.com/en/US/partner/docs/switches/datacenter/sw/4_2/nx-os/unicast/configuration/guide/l3_virtual.html#wp1070879


Hope to help

Giuseppe


s-durando Fri, 10/23/2009 - 00:42
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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
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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
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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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