Alcatel-Lucent 6850-48 Guida Di Riferimento

OmniSwitch CLI Reference Guide

page 3-1

The Chassis MAC Server (CMS) manages MAC addresses on the switch. The MAC addresses managed 
via the CMS are used as identifiers for the following functions:

• Base chassis MAC address

• Ethernet Management Port (EMP)

• VLAN router ports

Similar to IP addresses, MAC addresses are assigned by the Internet Assigned Numbers Authority (IANA) 
and distributed to users in sequential blocks. A sequential block of MAC addresses is referred to as a MAC 
address range.

The MAC address range is stored on the switch’s EEPROM. The switch supports one MAC address range 
only. By default, this MAC address range contains thirty-two (32) factory-installed, contiguous MAC 
addresses. Users may add additional MAC addresses; the maximum capacity for the switch’s default range 
is 256 MAC addresses.

In stackable switches, CMS is responsible for sharing the base MAC address of the primary switch with all 
the other switches in the stack. This helps the secondary switch to retain the same MAC address during 
takeover.This is called MAC Address Retention.

Note. MAC Retention is supported on the OmniSwitch 6850 Series and OmniSwitch 6400 Series 
switches.

MIB information for the Chassis MAC Server commands is as follows:

Filename: AlcatelIND1MacServer.MIB
Module: Alcatel-IND1-MAC-SERVER-MIB

A summary of the available commands is listed here: 

mac-range eeprom
mac-retention status
mac-retention dup-mac-trap
mac release
show mac-range
show mac-range alloc
show mac-retention status