Mac Retention Applications; Software Failure - Alcatel-Lucent OmniSwitch AOS Release 6 Manual

Configuring MAC Retention

MAC Retention Applications

This section illustrates the MAC Retention feature using two different scenarios:
•

Software Failure

•
Link Failure
Software Failure
In the following diagram, if the primary element faces a fatal software exception, the MAC Retention
feature will remain enabled and the base MAC address will be retained during takeover.
1
2
3
Stack 1
In the above diagram, when the primary element in Stack 1 fails, the secondary element becomes the new
primary element and shares the MAC address of the former primary element of the stack. In this scenario,
the decision to retain the base MAC address is acceptable. This feature also works well during the
following failures:
•
Power failure of the primary element
•
Hardware failure of the primary element
OmniSwitch AOS Release 6 Network Configuration Guide
Primary Element
a
b
a
Secondary Element
b
a
Idle Element
b
Stack Status when Switch 1 is Down
July 2010
MAC Retention Applications
Switch 1
page 9-7