H3C Technologies H3C MSR 50 - Manual (Page 17)

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• IP fast reroute (FRR). IP FRR is supported by OSPF, RIP, IS-IS and static routing. For more information,
see Layer 3—IP Routing Configuration Guide.
Protocols and standards
• RFC 5880, Bidirectional Forwarding Detection (BFD)
• RFC 5881, Bidirectional Forwarding Detection (BFD) for IPv4 and IPv6 (Single Hop)
• RFC 5882, Generic Application of Bidirectional Forwarding Detection (BFD)
• RFC 5883, Bidirectional Forwarding Detection (BFD) for Multihop Paths
• RFC 5884, Bidirectional Forwarding Detection (BFD) for MPLS Label Switched Paths (LSPs)
• RFC 5885, Bidirectional Forwarding Detection (BFD) for the Pseudowire Virtual Circuit Connectivity
Verification (VCCV)
Configuring BFD basic functions
The BFD basic function configuration is the basis for configuring BFD for other protocols.
Configuration prerequisites
Before configuring BFD basic functions, complete the following tasks:
• Configure the network layer addresses of the interfaces so that adjacent nodes are reachable to
each other at the network layer.
• Configure the routing protocols that support BFD.
Configuration procedure
To configure BFD basic functions:
Step Command Remarks
1. Enter system view. system-view N/A
2. Specify the mode for
establishing a BFD session. bfd session init-mode { active |
passive }
Optional.
active by default.
3. Configure the destination port
number for multi-hop BFD
control packets.
bfd multi-hop destination-port
port-number Optional.
4784 by default.
4. Configure the source IP
address of echo packets.
bfd echo-source-ip ip-address
This command applies to only BFD
echo packet mode.
The source IP address cannot be on
the same network segment as any
local interface's IP address.
Otherwise, a large number of
ICMP redirect packets might be
sent from the peer, resulting in link
congestion.