Cisco NCS 5500 Series

Displays the LDP IGP synchronization information for IPv4 or IPv6 address families.
Example
The example shows how to configure LDP IGP synchronization for OSPF.
router ospf 100
mpls ldp sync
!
mpls ldp
igp sync delay 30
!
OSPF Authentication Message Digest Management
All OSPF routing protocol exchanges are authenticated and the method used can vary depending on how
authentication is configured. When using cryptographic authentication, the OSPF routing protocol uses the
Message Digest 5 (MD5) authentication algorithm to authenticate packets transmitted between neighbors in
the network. For each OSPF protocol packet, a key is used to generate and verify a message digest that is
appended to the end of the OSPF packet. The message digest is a one-way function of the OSPF protocol
packet and the secret key. Each key is identified by the combination of interface used and the key identification.
An interface may have multiple keys active at any time.
To manage the rollover of keys and enhance MD5 authentication for OSPF, you can configure a container of
keys called a keychain with each key comprising the following attributes: generate/accept time, key
identification, and authentication algorithm.
Configure Authentication Message Digest Management for OSPF
This task explains how to manage authentication of a keychain on the OSPF interface.
Before you begin
A valid keychain must be configured before this task can be attempted.
SUMMARY STEPS
1. configure
2. router ospf process-name
3. router-id { router-id }
4. area area-id
5. interface type interface-path-id
6. authentication[ message-digest keychain | keychain keychain | null]
7. commit
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
95
Implementing OSPF
OSPF Authentication Message Digest Management