Configuring Vf Tracking - HPE FlexNetwork HSR6800 series Configuration Manual

Configuring VF tracking

Configuration prerequisites
Before you configure the VF tracking function, create a VRRP group and configure a virtual IPv6
address for it.
Configuration procedure
VRRP operates in load balancing mode. Assume that you have configured the VF tracking function
to monitor a track entry and specified the value by which the weight decreases. When the status of
the track entry becomes negative, the weight values of all VFs on the router decrease by the
specified value. When the status of the track entry becomes positive or invalid, the weight values of
all VFs on the router restore their original values.
If you configure the VF tracking function on an LVF to monitor its corresponding AVF on a specified
router, the LVF can take over the AVF immediately when the status of the track entry becomes
negative, to ensure uninterrupted network communications.
You can configure the VF tracking function when VRRP operates in either standard mode or load
balancing mode. However, the VF tracking function is effective only when VRRP operates in load
balancing mode.
By default, the weight of a VF is 255, and its lower limit of failure is 10.
If the weight of a VF owner is higher than or equal to the lower limit of failure, the priority of the VF
owner is always 255 and does not change with the weight value. Therefore, if an uplink fails, another
VF takes over the VF owner's work and becomes the AVF only when the weight of the VF owner
decreases by a correctly specified value and becomes lower than the lower limit of failure. In other
words, the weight of the VF owner decreases by more than 245.
To configure VF tracking:
Step
1. Enter system view.
2. Enter the specified interface
view.
3. Configure VF tracking.
Command
system-view
interface interface-type
interface-number
•
Configure the VF tracking
function to monitor a
specified track entry and
specify the value by which
the weight decreases:
vrrp ipv6 vrid
virtual-router-id weight track
track-entry-number
[ reduced weight-reduced ]
•
Configure the VF tracking
function to monitor an AVF
on a specified router:
vrrp ipv6 vrid
virtual-router-id track
track-entry-number
forwarder-switchover
member-ip ipv6-address
155
Remarks
N/A
N/A
Use either method.
The VF tracking function is not
configured by default.