R0106-HP MSR Router Series High Availability Configuration Guide(V7)
25
Ste
p
Command
Remarks
5. Specify the source interface for
receiving and sending VRRP
packets.
vrrp vrid virtual-router-id
source-interface interface-type
interface-number
By default, the source interface for
receiving and sending VRRP
packets is not specified. The
interface where the VRRP group
resides sends and receives VRRP
packets.
6. Enable TTL check for IPv4 VRRP
packets.
vrrp check-ttl enable
By default, TTL check for IPv4 VRRP
packets is enabled.
7. Return to system view.
quit N/A
8. Configure a DSCP value for
VRRP packets.
vrrp dscp dscp-value
The DSCP value identifies the
packet priority during
transmission.
By default, the DSCP value for
VRRP packets is 48.
Configuring VF tracking
You can configure VF tracking in both standard mode and load balancing mode, but the function takes
effect only in load balancing mode.
In load balancing mode, you can establish the collaboration between the VFs and NQA or BFD through
the tracking function. When the state of the track entry transits to Negative, the weights of all VFs in the
VRRP group on the router decrease by a specific value. When the state of the track entry transits to
Positive or Notready, the original weight values of the VFs restore.
Configuration guidelines
• By default, the weight of a VF is 255, and its lower limit of failure is 10.
• When the weight of a VF owner is higher than or equal to the lower limit of failure, its priority is
always 255 and does not change with the weight. To guarantee that an LVF can take over the VF
owner as the AVF when the upstream link of the VF owner fails, the reduced weight for the VF owner
must be higher than 245 so the weight of the VF owner can drop below the lower limit of failure.
Configuration procedure
To configure VF tracking:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure the VFs in a VRRP
group to monitor a track entry
and configure the reduced
weight.
vrrp vrid virtual-router-id weight
track track-entry-number [ reduced
weight-reduced ]
By default, no track entry is
specified.