VRF-related System-Max Values

The default FastIron configuration does not allow space for VRF routing tables. As a result, you must modify VRF-related system-max values before configuring a VRF instance. The following table lists commands that configure system-max values at the global level.

For the IPv4 partition, the default value for IPv4 TCAM allocation is decreased to 10,000. IPv6 TCAM allocation can then be increased from the default value of 908 to 1408. Both IPv4 and IPv6 VRF instances are planned to allocate 500 routes each.

The following table lists the ip-vrf configuration limits for the system-max command, by line card and platform.

For ICX 7250, ICX 7450 and ICX 7650 devices, if the maximum number of routes are not configured, the default is considered the maximum IPv4 routes to be allocated per user-defined VRF. Once this value is reached, routes are not added and a SYSLOG is generated. Refer to the SYSLOG Message Descriptions section of the RUCKUS FastIron Monitoring Configuration Guide for more information.

The following table lists values for ip-route and ip6-route on the ICX 7250.

The following table lists values for ip-route and ip6-route on the RUCKUS ICX 7150. Values vary depending on the IPv6 prefix length.

The following table lists values for ip-cache and ip6-cache on the RUCKUS ICX 7150.

The following examples illustrate the system-max values to support two VRF instances for IPv4 and two instances for IPv6:

• To allocate 2 x 500 routes for IPv4 user-VRF, (10000 - (500+500) = 9000 routes):

device(config)# system-max ip-route-default-vrf 9000 
Total max configured ipv4 routes are 12000
  - Max ipv4 routes configured for default VRF are 9000
  - Max ipv4 routes available for all non-default VRFs are 3000
Warning: Please revalidate these values to be valid for your configuration.
Reload required.  Please write memory and then reload or power cycle.
device#

• To modify the IPv4 partition after modifying the ip-route-default-vrf value:

device(config)# system-max ip-route 10000
ip-route and ip6-route values changed.
ip-route: 10000
ip6-route: 1408
Warning: Please reconfigure system-max for ip-route-default-vrf and ip-route-vrf (if required).
Reload required.  Please write memory and then reload or power cycle.
device#

• To allocate 2 x 500 routes for IPv6 user-VRF (1408 - (500+500) = 408):

device(config)# system-max ip6-route-default-vrf 408
Total max configured ipv6 routes are 1408
  - Max ipv6 routes configured for default VRF are 408
  - Max ipv6 routes available for all non-default VRFs are 1000
Warning: Please revalidate these values to be valid for your configuration.
Reload required.  Please write memory and then reload or power cycle.
device#

• To allocate 500 routes for IPv6 user-VRF:

device# system-max ip6-route-vrf 500
Reload required.  Please write memory and then reload or power cycle.
device# end

• To save the configuration changes:

  device# write memory
  Write startup-config done.
  device# Flash Memory Write (8192 bytes per dot) .
  Flash to Flash Done.

• After the system reloads, the system-max configuration appears as an active configuration.

!
system-max ip-route 12000
system-max ip6-route 5120
system-max ip-route-default-vrf 9000
system-max ip6-route-default-vrf 5120
system-max ip-route-vrf 500
system-max ip6-route-vrf 500
!