Huawei NetEngine80E Configuration Manual - Reliability page 320

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
Figure 4-28 Networking diagram for VRRP IPv6 association
Backup group 1
Virtual IP Address 2001:db8::100
2001:db8::3/64
NOTE
l If a BFD session needs to be configured on two devices but one device does not support BFD, a BFD
l This example describes how to configure a VRRP backup group to track a peer BFD session. If a link
Configuration Roadmap
The configuration roadmap is as follows:
1. Assign an IP address to each interface of each Router and configure OSPF on each
Router to ensure network connectivity.
2. Configure a VRRP IPv6 backup group on routers and set different VRRP priorities for the
devices to determine the master or backup state for the routers, which ensures device-level
reliability for network links.
3. Configure a peer BFD session on Router A and Router B to monitor the link between
Router A and Router B.
4. Configure a VRRP IPv6 backup group on Router B to track the BFD session and allow
Router B to increase its VRRP priority by 40 to trigger a master/backup VRRP switchover
if the BFD session goes Down.
5. Configure the VRRP IPv6 backup group to track a VRRP-disabled interface connecting
Router A to the upper-layer network so that Router A can reduce its VRRP priority and
trigger a master/backup VRRP switchover if its tracked interface goes Down.
Issue 02 (2014-09-30)
GE1/0/0
2001:db8::1/64
SwitchA
GE1/0/0
HostA
2001:db8::2/64
session with the one-arm Echo function can be configured on the BFD-enabled device. After receiving
BFD packets sent by the BFD-enabled device, the device that does not support BFD directly loops
back the packets, implementing rapid fault detection. For detailed configuration procedures, see
Example for Configuring a BFD Session with the One-Arm Echo
BFD session is used, its configuration is similar to that of the peer BFD session, with the exception
that the IP address of a directly connected interface is specified in the bfd bfd-name bind peer-ip
command to configure the link BFD session.
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RouterA
Master
POS1/0/0
2001:db8:1::1/64
Peer
BFD
RouterC
POS1/0/0
2001:db8:2::1/64
RouterB
Backup
4 VRRP Configuration
POS1/0/0
2001:db8:1::2/64
GE3/0/0
2001:db8:3::2/64
POS2/0/0
2001:db8:3::1/
2001:db8:2::2/64
5.17.10
Function.
303
HostB