Huawei NetEngine80E Configuration Manual - Reliability page 109

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
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Issue 02 (2011-09-10)
table before configuring a VRRP backup group to track the BFD session status.
Otherwise, the link BFD session status tracked by mVRRP is not the same as the
actual session status.
– BFD for static LSP
– BFD for LDP LSP
– BFD for CR-LSP
– BFD for TE
For VRRP for IPv6:
1. Run:
system-view
The system view is displayed.
2. Run:
interface interface-type interface-number[.subinterface-number ]
The view of the interface configured with the VRRP backup group is displayed.
3. Run:
–
vrrp6 vrid virtual-router-id track bfd-session { session-id | session-
name bfd-configure-name } [ increased value-increased | reduced value-
reduced ]
The normal BFD session is tracked.
increased value-increased: specifies the value by which the priority increases
when the tracked BFD session goes Down. It is an integer ranging from 1 to 255.
The maximum value of the priority is 254 because 255 is reserved for only the IP
address owner.
reduced value-reduced: specifies the value by which the priority decreases when
the tracked BFD session goes Down. The value is an integer ranging from 1 to
254. The minimum value of the priority is 1. The priority 0 is reserved in the system
for special use. When the backup device receives a VRRP Advertisement packet
with the priority 0, it immediately switches to be the master device. By default, the
value of the priority decreases by 10.
NOTE
When configuring the value by which the priority increases or decreases, note that if the
priority of the Backup router in a backup group is higher than that of the Master router
whose priority is changed, the fast switchover is performed.
–
vrrp6 vrid virtual-router-id track bfd-session { session-id | session-
name bfd-configure-name } [ peer | link ]
The status of a link or peer BFD session is tracked.
When one of the following link BFD sessions is set up, you must run the
pst command to allow the BFD session to modify the status in an interface status
table before configuring a VRRP backup group to track the BFD session status.
Otherwise, the link BFD session status tracked by mVRRP is not the same as the
actual session status.
– BFD for static LSP
– BFD for LDP LSP
– BFD for CR-LSP
– BFD for TE
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4 VRRP Configuration
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