R2511-HP MSR Router Series High Availability Configuration Guide(V5)

9
• 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:
Ste
p
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.
5. Enter interface view.
interface interface-type
interface-number
N/A
6. Configure the minimum
interval for receiving BFD
echo packets.
bfd min-echo-receive-interval
value
Optional.
For more information, see the
description of the Required Min
Echo RX Interval field in "BFD
pac
ket format."
7. Configure the minimum
interval for transmitting BFD
control packets.
bfd min-transmit-interval value
Optional.
For more information, see the
description of the Desired Min TX
Interval field in "BFD packet
format."