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.

Table 44 Commands for configuring system-max values
Command	Description
ip-vrf	Configures maximum VRF instances supported by the software.
ip-route	Configures maximum IPv4 routes, used to initialize hardware during system init.
ip6-route	Configures maximum IPv6 routes, used to initialize hardware during system init.
ip-route-default-vrf	Configures maximum IPv4 routes to be allocated for the default VRF instance.
ip6-route-default-vrf	Configures maximum IPv6 routes to be allocated for the default VRF instance.
ip-route-vrf	Configures default maximum IPv4 routes to be allocated per user-defined VRF.
ip6-route-vrf	Configures default maximum IPv6 routes to be allocated per user-defined VRF.

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.

Table 45 Configuration limits for ip-vrf with the system-max command
Hardware	Minimum	Default	Maximum
FSX 3rd-generation line card	16	128	128
FSX 2rd-generation line card	0	4	4
ICX 7450	4	32	32
ICX 7750	16	128	128

Table 46 Additional configuration limits for the system-max command
Configuration	ICX 7450			ICX 7750
Configuration	Min	Default	Max	Min	Default	Max
ip-route (system-max IPv4 routes that all VRFs in total can support)	4096	12000	15168	98304	98304	131072
ip6-route (system-max IPv6 routes that all VRFs in total can support)	68	5120	5120	5120	5120	7168
ip-route-default-vrf (system-max IPv4 routes configuration for default-VRF)	1024	12000	15168	256	65536	131072
ip-route-vrf (default system-max IPv4 routes per non-default-VRF instances)	128	1024	15168	64	4096	131072
ip6-route-default-vrf (system-max IPv6 routes configuration for default-VRF)	64	5120	5120	64	2048	7168
ip6-route-vrf (default system-max IPv6 routes per non-default-VRF instances, for 3rd generation line cards)	64	100	5120	16	1024	7168

NOTE

The ICX 7250 is not included in the preceding table because the device does not support VRF. The following table lists values for ip-route and ip6-route on the ICX 7250.

Table 47 Configuration limits for ip-route and ip6-route on ICX 7250 devices
Configuration	Min	Default	Max
ip-route	4096	12000	12000
ip6-route	68	730	2048

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

Table 48 Configuration limits for ip-route and ip6-route onRuckus ICX 7150 devices
Configuration	Min	Default	Max
ip-route	20	800	1000
ip6-route (prefix length 0 – 64)	20	220	1000
ip6-route (prefix length 65 – 127)	20	256	256

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

Table 49 Configuration limits for ip-cache and ip6-cache on Ruckus ICX 7150 devices
Configuration	Min	Default	Max
ip-cache	20	2048	4076
ip6-cache	10	1024	2038

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#

NOTE

This example also modifies the ip6-route system-max parameter and is intended only for the ICX 7450.

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
!

Contents

VRF-related system-max values