Configuring Priorities For Interfaces Where A Backup Group Is Created - Huawei AR2200-S Series Configuration Manual

Huawei AR2200-S Series Enterprise Routers
Configuration Guide - Reliability
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
Step 3 Run:
vrrp vrid virtual-router-id virtual-ip virtual-address
A backup group is created and its virtual IP address is specified.
When you assign the first virtual IP address to a VRRP backup group, the system creates this
backup group. Then, when you assign another virtual IP address to the backup group, the system
adds this address into the virtual IP address list of this backup group.
For users who require equivalent VRRP reliability, a backup group can be configured with
multiple virtual IP addresses. Different addresses serve different user groups. This is easy to
manage and can prevent users' default gateway addresses from varying with the VRRP
configuration. A maximum number of 16 virtual IP addresses can be configured for a backup
group.
For a VRRP backup working in load balancing mode, you need to repeat the procedure to
configure multiple backup groups on an interface. At least two backup groups are required on
an interface. Backup groups are identified by VRIDs and their virtual IP addresses cannot be
identical.
To configure VRRP and static ARP simultaneously on a device, note that when VRRP is enabled
on an interface such as a sub-interface for Dot1q VLAN tag termination, or a VLANIF interface,
you cannot use the IP addresses mapping to static ARP entries related to these interfaces as the
VRRP virtual address. Otherwise, incorrect host routes are generated and abnormal forwarding
of the device may take place.
----End
2.3.3 Configuring Priorities for Interfaces Where a Backup Group
Is Created
Configuring priorities for interfaces on which a VRRP backup group is created allows the VRRP
status on an interface to become Master. The master device forwards network traffic.
Issue 01 (2012-01-06)
NOTE
l Virtual IP addresses of backup groups must be different.
l Both ends of the same backup group must be configured with the same virtual router IDs.
CAUTION
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