R0106-HP MSR Router Series High Availability Configuration Guide(V7)
6
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
This interface must be the
interface you are using as a
backup.
3. Associate the interface with a
track entry.
backup track track-entry-number
By default, an interface is not
associated with a track entry.
Configuring load-shared interface backup
To implement load-balanced interface backup, you must configure the traffic thresholds on the primary
interface. Interface backup regularly compares the amount of traffic with the thresholds to determine
whether to activate or deactivate a backup interface. The traffic polling interval is user configurable.
You can assign priority to backup interfaces.
• When the amount of traffic on the primary interface exceeds the upper threshold, the backup
interfaces are activated in descending order of priority.
• When the total amount of traffic on all load-shared interfaces decreases below the lower threshold,
the backup interfaces are deactivated in ascending order of priority.
If two backup interfaces have the same priority, the one configured first has preference.
If a traffic flow has a fast forwarding entry, all packets of the flow will be forwarded out of the outgoing
interface in the entry. The packets of the flow will not be distributed between interfaces when the upper
threshold is reached. For more information about fast forwarding, see Layer 3—IP Services Configuration
Guide.
To configure load-shared backup for an interface:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
You must enter the view of the
primary interface.
3. Configure a backup interface
for the interface.
backup interface interface-type
interface-number [ priority ]
By default, an interface does not
have any backup interfaces.
Repeat this command to specify up
to three backup interfaces.
4. Set backup load sharing
thresholds.
backup threshold upper-threshold
lower-threshold
By default, no traffic thresholds are
configured.
5. Set the traffic polling interval.
backup timer flow-check interval The default interval is 30 seconds.
Displaying and maintaining interface backup
Execute display commands in any view.
Task Command
Display traffic statistics for load-shared interfaces. display interface-backup statistics