###Configuring Bidirectional Forwarding Detection on the Cisco ASR 9000 Series Router

Restrictions for Configuring BFD

The following restrictions apply to BFD:

1. If you are using BFD with uRPF on a particular interface, then you need to use the echo disable command to disable echo mode on that interface; otherwise, echo packets are rejected. You can disable echo mode for the entire router, or for an individual interface.
2. Only the static, OSPF, and IS-IS applications are supported on BFD over bundle VLANs.

Configuring Bidirectional Forwarding Detection on the Cisco ASR 9000 Series Router

Restrictions for Configuring BFD

The following restrictions apply to BFD:

1. If you are using BFD with uRPF on a particular interface, then you need to use the echo disable command to disable echo mode on that interface; otherwise, echo packets are rejected. You can disable echo mode for the entire router, or for an individual interface.
2. Only the static, OSPF, and IS-IS applications are supported on BFD over bundle VLANs.