What is the maximum VRF instance for an ISR4451X

[robert_dantes]

Hello Community,

I wanted to know what is the maximum number of VRF instance and the number of routes per VRF instance can a ISR4451 with 2GB of data plane memory and 4GB of control/services plane mem. im looking for the same info as presented on an old white paper link below. But it was for the 3XXX series routers.

https://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/multiprotocol-label-switching-mpls/prod_white_paper0900aecd8051fbdc.html

[Jonathan Unger]

Hi there @robert_dantes,

There was a similar question around routing table capacity on the 4K routers answered by Philip D'Ath.

• https://community.cisco.com/t5/routing/maximum-bgp-table-size-in-isr-4551-4331-with-standard-data-plane/td-p/2816329 

I am not sure there is a documented "hard limit" on VRFs either, along the same lines as the other thread it would depend on several factors the primary of which would be overall memory consumption by other features running on the ISR.

If you have some very specific sizing requirements I would recommend reaching out to your Cisco partner for assistance. Partners can generally reach out to Cisco to gather information which is not publicly available.

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