system-max max-ip-mac

Changes the maximum number of MAC addresses that can be configured on IP interfaces.
Syntax
system-max max-ip-mac number
no system-max max-ip-mac number
Command Default

The default maximum of MAC addresses to be configured on IP interfaces is 120.

Parameters
number
The maximum number of MAC addresses to be configured on IP interfaces. The valid range is from 120 through 248. The default value is 120.
Modes

Global configuration mode

Usage Guidelines

Each physical or virtual Ethernet (VE) interface can be configured with only one MAC address. There is a maximum number of IP interfaces (248 on which an IP MAC address can be configured and the number of Virtual Router Redundancy Protocol (VRRP) virtual interfaces that can be supported simultaneously is affected by any increase over the default number of 120 interfaces. If the system-max max-ip-mac command is set above 120, a reduction in the number of IPv4 VRRP entries supported is calculated as <configured-value> - 120. For example, if the system-max max-ip-mac command is set to 130, the number of IPv4 VRRP entries is reduced by 10 entries (130-120).

You must save the configuration and reload the software before the changed maximum number takes effect.

The no form of the command resets the value to the default.

Examples

The following example increases the maximum number of MAC addresses that can be configured on IP interfaces. 

device# configure terminal
device(config)# system-max max-ip-mac 140
Total IP-MAC entries supported is changed to 140
 Total VRRP instances supported changed to 370, IPv4 VRRP instances: 228, IPv6 VRRP instances 120
Reload required.  Please write memory and then reload or power cycle.
device(config)# write memory
device(config)# exit
device# reload
History
Release version Command history
08.0.40 This command was introduced.
Parent topic: Commands Si - Z