 |
Note: You cannot enable BFD on multiple MPLS LSP paths. For example, if an LSP has a primary path and a secondary path, you can only enable OAM on the primary path. |
You can configure Bidirectional Forwarding Detection (BFD) on MPLS IPv4 LSPs as outlined in the Internet draft draft-ietf-bfd-mpls-02.txt, BFD for MPLS LSPs. You can configure BFD for LSPs using either LDP or RSVP as the signaling protocol. BFD is used as a periodic Operation, Administration, and Maintenance (OAM) feature for LSPs to detect LSP data plane faults.
|
Note: You cannot enable BFD on multiple MPLS LSP paths. For example, if an LSP has a primary path and a secondary path, you can only enable OAM on the primary path. |
You can also use the LSP ping commands to detect LSP data plane faults. However, there are a couple of benefits to using BFD. It requires less computer processing than LSP ping. It can also quickly detect faults in large numbers of LSPs (LSP ping commands must be issued manually for each LSP).
Although you can use BFD to detect LSP data plane faults, it does not have the equivalent functionality of LSP ping. Specifically, you cannot use it to check the control plane against the data plane. An LSP ping echo request can be associated with a forwarding equivalence class (FEC).
An LSP ping echo request can be associated with an FEC. This makes it possible to verify the control plane against the data plane at the egress LSR.
To configure BFD for MPLS LSPs, complete the procedures in the following section:
 | Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |