Alcatel-Lucent 6850-48 ハードウェアマニュアル

Changing the Secondary Module to Primary

Managing OmniSwitch 6850 Series Stacks

page 4-34

OmniSwitch 6850 Series Hardware Users Guide

OmniSwitch 6850 Series stacks allow users to manually force the secondary switch to assume the primary 
management role. This is referred to as “takeover.” The behavior of a takeover is similar to that of reload-
ing the primary management module (see 

). 

Whenever a takeover is initiated, the switch with the secondary role automatically takes over primary 
management functions. The primary switch is automatically reloaded and any traffic being passed on the 
primary switch’s Ethernet is interrupted. 

Meanwhile, the idle switch with the next-lowest slot number automatically assumes the secondary role. 
When the former primary module comes back up, it assumes an idle role within the stack.

To initiate a takeover sequence, use the 

 command. For example:

-> takeover

Note. Before using the takeover command, verify that the switches in the stack are synchronized. 
Otherwise, data flow and switch management functions may be interrupted due to incorrect or outdated 
software when a switch takes over the primary management role. For more information, refer to 

.

In this stack of four OmniSwitch 6850 Series switches, the slot 1 
switch is the primary management module. The slot 2 switch is 
the secondary. Slots 3 and 4 are operating in idle roles.

A takeover is initiated by the user; the primary management module 
is automatically reloaded. Any data flow on the primary switch’s 
Ethernet is interrupted.

The secondary switch takes over the primary role. The idle switch 
with the next-lowest slot number—in this case, slot 3—automatically 
becomes the secondary management module. The slot 4 switch 
remains unaffected. In addition, Ethernet traffic on slots 2, 3, and 4 
remains unaffected.

When the former primary switch comes back up, it assumes an idle 
role within the stack.