Version 6.6 261 October 2014
Installation & Operation Manual 29. Working with the ES Boards
29 Working with the ES Boards
The Ethernet Switch (ES) boards provide IP network connectivity for all of the boards
inside the Mediant 8000 chassis (i.e., the SC and Media Gateway boards.
29.1 ES Redundancy Mode
There are two ES boards in the chassis. Each board should be independently
connected to the external IP network. The two ES boards operate in an asymmetric
1+1 redundant mode. At any time, one of the ES boards is Active and provides
connectivity for the rest of the chassis' boards, while the other ES board is Standby.
When the Active ES board fails, the Standby ES board takes over activity and
becomes the Active ES board.
An Internal link (F-Link) interconnects between the two ES boards and provides
internal communications between the boards inside the chassis.
29.2 ES Boards in the EMS
In the EMS, the Active ES board is colored black and the Standby ES board is colored
blue-gray. The ES board in slot 9 is initially the Active ES board (upon chassis power
up) and the ES board in slot 19 is initially the Standby ES board.
Figure
29-1: ES Boards in the EMS
The status of the ES boards is represented by standard Operational State,
Administrative State and Severity attributes.
When the ES board is functioning properly, its Operational State is set to
Enabled, Severity is set to Clear and in the EMS the board is colored green.
When the ES board's functionality is degraded, an alarm indicating the problem
details is generated and the board's Severity is set according to the alarm's
severity. In the EMS, the board is colored blue, yellow or orange, according to the
Severity value.
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