Allocating TCAM Space

The amount of TCAM space to allocate for IPv4 routing information can be configured. You must save the running configuration to the startup configuration and reload the device for the changes to take effect. After the reload, the remaining TCAM space is allocated automatically for IPv6 routing information.

TCAM space allocations for IPv4 and IPv6 routes and other entities can be modified by configuring the number of IPv4 route entries. Different devices have different amounts of TCAM space. Refer to TCAM Space Allocation for the default, maximum, and minimum allocations.

Note: If you disable IPv6 routing, the TCAM space allocations do not change. If you want to allocate the maximum possible space for IPv4 routing information, you must configure the TCAM space manually.

Note: ICX 7150 devices permit only manual configuration of IPv4 routes.

Note: ICX 7150-ES devices only support static IPv4 routes.

Note: For ICX 7550, ICX 7850, ICX 8100, and ICX 8200 devices, values are used from the forwarding profile and there is no option to change these values. When a new profile is selected, the values from the new profile are applied. Refer to the forwarding-profile command in the RUCKUS FastIron Command Reference and the "Configuration Fundamentals" chapter in the RUCKUS FastIron Management Configuration Guide for more information.

Enter global configuration mode.
```
device# configure terminal
```

To allocate TCAM space to store 6,000 IPv4 routes entries, use the following command.
```
device(config)# system-max ip-route 6000
```

Copy the running configuration to the startup configuration.
```
device(config)# write memory
```

Return to privileged EXEC mode.
```
device(config)# exit
```

Reload the device for the new TCAM space allocations to be changed.
```
device# reload
```

The following example configures TCAM space for 6000 IPv4 route entries. After the device reload, you can view the new TCAM allocation numbers for IPv6 entries.

device# configure terminal
device(config)# system-max ip-route 6000
device(config)# write memory
device(config)# exit
device# reload
device# show run
.
.
.
ip-route: 6000
ip6-route 365
ip6-cache: 182

IPv6 Addressing

Allocating TCAM Space