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CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 12

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
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Configuring BFD to Detect an Eth-Trunk in a VLAN

Configuring BFD to Detect an Eth-Trunk in a VLAN

BFD for Perlink fast detects and monitors an Eth-Trunk in a VLAN.

Pre-configuration Tasks

Before configuring BFD to detect an Eth-Trunk in a VLAN, complete the following tasks:

  • Configuring an Eth-Trunk and ensuring that its link layer protocol status is Up

  • Adding the Eth-Trunk to a VLAN

  • Allocating an IP address to a VLANIF interface

Configuration Process

Figure 11-20 Configuring BFD to detect an Eth-Trunk in a VLAN


  1. Run:


    The system view is displayed.

  2. Run:


    BFD is enabled globally and the BFD view is displayed.

    By default, BFD is disabled globally.

  3. Run:


    Return to the system view.

  4. Run:

    bfd session-name bind peer-ip ip-address [ vpn-instance vpn-name ] interface interface-type interface-number source-ip ip-address per-link one-arm-echo

    A BFD session for Perlink is created.

    • The local and remote BFD discriminators of BFD for Perlink do not need to be configured manually.
    • When using BFD for Perlink, ensure that URPF is disabled on the transmit end of BFD packets. Otherwise, the BFD Echo function may become invalid.

  5. Run:


    The configuration is committed.

Updated: 2019-08-09

Document ID: EDOC1000041694

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