3Com S7906E Configuration Manual page 300

[Sysname-fiber-group1] group member olt3/0/2
[Sysname-fiber-group1] display fiber-backup group 1
fiber backup group 1 information:
Member Role
-----------------------------------------
Olt3/0/1 MASTER
Olt3/0/2 SLAVE
# Perform a master/slave switchover between OLT 3/0/1 and OLT 3/0/2.
[Sysname-fiber-group1] port switch-over
[Sysname-fiber-group1] display fiber-backup group 1
fiber backup group 1 information:
Member Role
-----------------------------------------
Olt3/0/2 MASTER
Olt3/0/1 SLAVE
# Shut down OLT 3/0/2. You can see that OLT 3/0/1 becomes the new master port.
[Sysname-fiber-group1] quit
[Sysname] interface olt3/0/2
[Sysname-Olt3/0/2] shutdown
[Sysname-Olt3/0/2] display fiber-backup group 1
fiber backup group 1 information:
Member Role
-----------------------------------------
Olt3/0/1 MASTER
Olt3/0/2 SLAVE
State
ACTIVE
READY
State
ACTIVE
READY
State
ACTIVE
DOWN
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