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direct link between Router A and Router B. After receiving a BFD packet sent by Router A,
Router B directly loops back the packet, achieving fast detection over the link.
Figure 5-13
Networking diagram of the one-arm Echo function configuration
BFD-incapable
GE1/0/0
10.1.1.1/24
GE1/0/0
10.1.1.2/24
RouterA
RouterB
BFD-capable
Single-hop
BFD session
Configuration Roadmap
The configuration roadmap is as follows:
1.
Configure a BFD session on Router A to detect the direct link between Router A and
Router B.
Data Preparation
To complete the configuration, you need the following data:
l
Peer IP address to which a BFD session with the one-arm Echo function is bound
l
Local discriminator of a BFD session with the one-arm Echo function
l
The minimum interval between the receipt of BFD packets
Procedure
Step 1
Assign IP addresses to the interfaces directly connecting Router A and Router B.
# Assign an IP address to the interface on Router A.
<HUAWEI>
system-view
[HUAWEI]
sysname RouterA
[RouterA]
interface gigabitethernet 1/0/0
[RouterA-GigabitEthernet1/0/0]
undo shutdown
[RouterA-GigabitEthernet1/0/0]
ip address 10.1.1.1 24
[RouterA-GigabitEthernet1/0/0]
quit
# Assign an IP address to the interface on Router B.
<HUAWEI>
system-view
[HUAWEI]
sysname RouterB
[RouterB]
interface gigabitethernet 1/0/0
[RouterB-GigabitEthernet1/0/0]
undo shutdown
[RouterB-GigabitEthernet1/0/0]
ip address 10.1.1.2 24
[RouterB-GigabitEthernet1/0/0]
quit
Step 2
Configure a BFD session with the one-arm Echo function.
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
5 BFD Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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