Prerequisites for MPLS LDP Lossless MD5 Session Authentication
The MPLS LDP Lossless MD5 Session Authentication feature is an enhancement to the MPLS LDP MD5 Global Configuration feature. Before configuring the MPLS LDP Lossless MD5 Session Authentication feature, see the “MPLS LDP MD5 Global Configuration” feature module for more information on how the message digest algorithm 5 (MD5) works with Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP) to ensure that LDP segments remain properly protected.
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The MPLS LDP Lossless MD5 Session Authentication feature must be configured before MPLS LDP is configured. |
Configure the following features on the label switch router (LSR) before configuring the MPLS LDP Lossless MD5 Session Authentication feature:
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Distributed Cisco Express Forwarding
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Static or dynamic routing
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MPLS Virtual Private Network (VPN) routing and forwarding (VRFs) instances for MPLS VPNs
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MPLS LDP Lossless MD5 Session Authentication for the MPLS VPN VRFs
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If a VRF is deleted, then the lossless MD5 session authentication for that VRF is automatically removed. |