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Protocols and standards, Configuring bfd basic functions, Configuring echo packet mode – H3C Technologies H3C MSR 5600 User Manual

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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

Before configuring BFD basic functions, configure the network layer addresses of the interfaces so that

adjacent nodes are reachable to each other at the network layer.
After a BFD session is established, the two ends negotiate BFD parameters, including minimum sending

interval, minimum receiving interval, initialization mode, and packet authentication, by exchanging

negotiation packets. They use the negotiated parameters without affecting the session status.

Configuring echo packet mode

Step Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Configure the source IP

address of echo packets.

Configure the source IP address
of echo packets:

bfd echo-source-ip ip-address

Configure the source IPv6
address of echo packets:

bfd echo-source-ipv6

ipv6-address

Use either command.
By default, no source IP address is
configured for echo packets.
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.
The source IPv6 address of echo
packets can only be a global

unicast address.

3.

Enter interface view.

interface interface-type
interface-number

N/A

4.

(Optional.) Configure the
minimum interval for receiving

BFD echo packets.

bfd min-echo-receive-interval
value

The default setting is 1000
milliseconds.

5.

(Optional.) Configure the
single-hop detection time

multiplier.

bfd detect-multiplier value

The default setting is 5.

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