Configuring The Bfd Session Passive Echo Function - Huawei NetEngine80E Configuration Manual - Reliability

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
Applicable Environment
The BFD passive Echo function is applicable only to the one-hop BFD session.
If a device supports the Echo function in the network, the BFD passive Echo function needs to
be configured to be compatible with other devices.
Figure 5-2 Application scenario of the BFD passive Echo function
RouterA Supports BFD
Passive Echo Function
As shown in
Pre-configuration Tasks
Before configuring the BFD passive Echo function, complete the following tasks:
l
l
Data Preparation
To configure the BFD passive Echo function, you need the following data.
No.
1

5.3.2 Configuring the BFD Session Passive Echo Function

In special scenarios that require interworking between a local device and the device that supports
the Echo function, you can configure the BFD passive Echo function.
Context
Perform the following steps on the router that is to be enabled with the passive Echo function:
Issue 02 (2014-09-30)
RouterA
Figure 5-2, the passive Echo function needs to be enabled on RouterA.
Enable BFD globally.
(Optional) Set up the ACL.
NOTE
The BFD Echo packet is looped back through ICMP redirect at the remote end. In the IP packet that
encapsulates the BFD Echo packet, the destination address and the source address are the IP address of the
outgoing interface of the local end. Therefore, in the ACL rule, both the source addresses of the remote
end and the local end must be permitted.
Data
(Optional) ACL number
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Single-hop BFD
5 BFD Configuration
RouterB
RouterB Supports BFD
Echo Function
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