Recommended value for IPv4 FIB AAGR 7600?

I'm just wondering if there is a "best practices" or widely accepted value inhabitants settled on?

I understand that I ask a broad question, the best answer is "it depends."
and each circumstance may have different needs and different values.

Dilapidated fast from our network:
IPv6 is enabled but unproductive, but we want the complete picture of IPv6 at year end.  No multicast and not necessary.

Table full of IPv4, multihomed, and private peering.  Some 75 ASN us with peers.  No multi-path, no plans for her.

RSP720-3CXL

We hope to get another 4-5 years from the material, we are no where near capacity from fabric/backplane.  We do VoIP, packets, lower bps higher PPS.

We are 95% with warnings of threshold.  default value of 512 k

I saw an exchange of views and people seem to stabilize on 640 k.

Any consideration is not to use 640 k?

View orders:

#show mls cef maximum-routes
Maximum routes FIB AAGR:
=======================
Current: -.
-------
IPv4 + MPLS - 512 k (default)
IPv6 + IP Multicast - 256 k (default)

#show mls cef su

Total of roads: 498430
Unicast IPv4 routes: 496353
Multicast IPv4 routes: 4
Routes MPLS: 2049
Unicast IPv6 routes: 22
IPv6 multicast routes: 5
Moe routes: 0

#

Use of the FIB AAGR: Total % used used (s)
72 bit (IPv4, MPLS, MOE) 524288 498420 95%
144 bits (mcast IP, IPv6) 262144 33 1%

We settled with the below in 'standard' overall 7600 estate.

#show mls cef maximum-routes

Maximum routes FIB AAGR:
=======================
Current: -.
-------
IPv4 + MPLS - 736 k (default)
IPv6 - 128 k
IP Multicast - 16 k

Use of module FIB AAGR: % Total used used (s)
4 72 bits (IPv4, MPLS, MOE) 753664 540607 72%
144 bits (mcast IP, IPv6) 147456 17731 12%

Tags: Cisco Support

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