request chassis ssb master switch
Syntax
request chassis ssb master switch <no-confirm>
Description
(M20 router only) Control which System and Switch Board (SSB) is primary.
Options
| no-confirm | (Optional) Do not request confirmation for the switch. |
Additional Information
By default, the SSB in slot 0 (SSB0)
is the primary and the SSB in slot 1 (SSB1) is the backup. If you
use this command to change the primary, and then restart the chassis
software for any reason, the primary reverts to the default setting.
To change the default primary SSB, include the ssb statement
at the [edit chassis redundancy] hierarchy level in
the configuration. For more information, see the Junos OS Administration Library for Routing Devices.
The configurations on the two SSBs do not have to be the same, and they are not automatically synchronized. If you configure both SSBs as primaries, when the chassis software restarts for any reason, the SSB in slot 0 becomes the primary and the one in slot 1 becomes the backup.
The switchover from the primary SSB to the backup SSB is immediate. The SSB takes several seconds to reinitialize the Flexible PIC Concentrators (FPCs) and restart the PICs. The interior gateway protocol (IGP) and BGP convergence times depend on the specific network environment.
Required Privilege Level
maintenance
Output Fields
When you enter this command, you are provided feedback on the status of your request.
Sample Output
request chassis ssb primary switch
user@host> request chassis ssb master switch warning: Traffic will be interrupted while the PFE is re-initialized Toggle mastership between system switch boards ? [yes,no] (no) yes Switch initiated, use “show chassis ssb” to verify
request chassis ssb primary switch no-confirm
user@host> request chassis ssb master switch no-confirm Switch initiated, use “show chassis ssb” to verify
Release Information
Command introduced before Junos OS Release 7.4.