Enabling Bfd Globally; Setting Up A Bfd Session - Huawei AR2200-S Series Configuration Manual

Huawei AR2200-S Series Enterprise Routers
Configuration Guide - Reliability
Data Preparation
To configure single-hop BFD, you need the following data.
No.
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3.2.2 Enabling BFD Globally

Enabling BFD globally is the prerequisite for BFD configurations.
Context
If single-hop BFD detection is performed on Layer 2 interfaces or Layer 3 physical interfaces
without IP addresses, a default multicast IP address is used.
Do as follows on both ends of a link to be checked:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
bfd
BFD is enabled globally and the BFD view is displayed.
Step 3 (Optional) Run:
default-ip-address ip-address
The default multicast IP address of BFD is configured.
By default, the multicast IP address used by BFD is 224.0.0.184.
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3.2.3 Setting Up a BFD Session

Creating a BFD session on both ends of a direct link enables BFD to rapidly detect a fault in the
direct link.
Issue 01 (2012-01-06)
Data
BFD configuration name
Peer IP address, local interface type and number for the directly-connected link
detected by BFD, and default multicast address used by BFD if it checks the physical
layer status of the link
BFD session parameters: local and remote discriminators
NOTE
If more than one BFD session is created for the same link, for example, a Layer 3 interface is connected
by BFD-enabled Layer 2 switches, different default multicast addresses need to be configured for the
switches. These addresses distinguish one BFD session from another and ensure that BFD packets are
forwarded correctly.
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