R0106-HP MSR Router Series High Availability Command Reference(V7)

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NOTE:
To set the bandwidth used for load sharing calculation in this command, use the bandwidth command on
the primary interface.
Usage guidelines
Before you can use this command on an interface, you must specify at least one backup interface for the
interface.
This command enables a primary interface and its backup interfaces to be load shared. In load sharing
mode, interface backup regularly compares the amount of traffic with the thresholds.
• When the amount of traffic on the primary interface exceeds the upper threshold, the backup
interfaces are activated to share load in descending order of backup priority.
• When the total amount of traffic on all the load-shared interfaces drops below the lower threshold,
the backup interfaces are deactivated in ascending order of priority.
• When the primary interface goes down, the active/standby mode applies. Only the highest-priority
interface is activated.
You can configure the traffic polling interval by using the backup timer flow-check command.
NOTE:
• "Traffic" on an interface refers to the amount of incoming or outgoing traffic, whichever is higher.
• If two backup interfaces have the same priority, the one configured first has preference.
Examples
# On Serial 2/1/0, set the upper and lower traffic thresholds to 80 and 20, respectively.
<Sysname> system-view
[Sysname] interface serial 2/1/0
[Sysname-Serial2/1/0] backup threshold 80 20
Related commands
• backup interface
• backup timer flow-check
• bandwidth
backup timer delay
Use backup timer delay to set interface state switchover delay timers on a primary interface.
Use undo backup timer delay to restore the default.
Syntax
backup timer delay up-delay down-delay
undo backup timer delay
Default
Both up and down delay timers are 5 seconds.
Views
Interface view