Huawei NetEngine80E Configuration Manual - Reliability page 335

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
BFD for
everything
BFD for OSPF
BFD for
OSPFv3
Issue 02 (2014-09-30)
Usage Scenario
OSPF enables the router to
periodically send Hello packets to a
neighboring router for fault
detection. Detecting a fault takes
more than 1s. As technologies
develop, voice, video, and other
VOD services are widely used.
These services are quite sensitive to
packet loss and delays. When traffic
is transmitted at gigabit rates, long-
time fault detection will cause
packet loss. This cannot meet high
reliability requirements of the
carrier-class network. BFD for
OSPF is introduced to resolve this
problem. After BFD for OSPF is
configured in a specified process or
on a specified interface, the link
status can be rapidly detected and
fault detection can be completed in
milliseconds. This speeds up OSPF
convergence when the link status
changes.
To increase the convergence speed
of OSPFv3 when the link status
changes, you can configure BFD on
OSPFv3 links. BFD keeps track of
liveliness of network links and
detects any faults in the links much
faster than the normal keep-alive
protocols. When OSPFv3 is
associated with BFD sessions, link
failures are notified immediately to
OSPFv3 by BFD and OSPFv3 can
take actions to perform route
calculation and converge in the new
network topology.
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5 BFD Configuration
Configuration Reference
Configuring BFD for OSPF
Configuring BFD6 for OSPFv3
318