Creating A Bfd Session - Huawei Quidway S6700 series Configuration Manual

Quidway S6700 Series Ethernet Switches
Configuration Guide - Reliability
To implement single-hop BFD on a Layer 2 forwarding link, BFD needs to use a multicast IP
address. By default, BFD uses the multicast IP address 224.0.0.184.
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5.3.4 Creating a BFD Session

Context
Do as follows on S6700s at both ends of the link to be detected.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run the following command as required.
l If the VLANIF interface has an IP address, run:
l For a Layer 2 interface, run:
Step 3 Set the discriminators.
l Run:
l Run:
Issue 01 (2011-07-15)
NOTE
l If this multicast IP address is used by other protocols on the network, you must change the multicast
IP address. The S6700s at both ends of the BFD session must use the same multicast IP address.
l If multiple BFD sessions exist on a path, for example, Layer 3 interfaces are connected through Layer
2 switching devices that support BFD, you must configure different default multicast IP addresses for
the devices where different BFD sessions are established. In this manner, BFD packets can be correctly
forwarded.
bfd cfg-name bind peer-ip peer-ip [ vpn-instance vpn-instance-name ] [interface interface-
type interface-number ] [ source-ip source-ip ]
– When creating a single-hop BFD session for the first time, you must bind the single-hop
BFD session to the peer IP address and the local address. In addition, the configuration
of the single-hop BFD session cannot be changed after being created.
– When BFD configuration items are created, the system checks only the format of the IP
address rather than the correctness. A BFD session cannot be established if an incorrect
peer IP address or source IP address is bound.
– When BFD and URPF are used together, URPF checks the source IP address of the
received BFD packets. In this case, you need to specify the correct source IP address of
BFD packets by setting the source-ip parameter when binding a BFD session to prevent
BFD packets from being discarded incorrectly.
bfd cfg-name bind peer-ip default-ip interface interface-type interface-number [ source-
ip source-ip ]
discriminator local discr-value
The local discriminator is set.
discriminator remote discr-value
The remote discriminator is set.
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