C613-50100-01 REV C Command Reference for x930 Series 992
AlliedWare Plus™ Operating System - Version 5.4.6-1.x
OSPF COMMANDS
IP
OSPF MESSAGE-DIGEST-KEY
ip ospf message-digest-key
Overview This command registers an MD5 key for OSPF MD5 authentication.
Message Digest Authentication is a cryptographic authentication. A key
(password) and key-id are configured on each router. The router uses an algorithm
based on the OSPF packet, the key, and the key-id to generate a message digest
that gets appended to the packet.
The no variant of this command removes the MD5 key.
Syntax
ip ospf [<ip-address>] message-digest-key <key-id> md5
<pswd-long>
no ip ospf [<ip-address>] message-digest-key <key-id>
Default By default, there is no MD5 key registered.
Mode Interface Configuration for a VLAN interface.
Usage Use this command for uninterrupted transitions between passwords. It allows you
to add a new key without having to delete the existing key. While multiple keys
exist, all OSPF packets will be transmitted in duplicate; one copy of the packet will
be transmitted for each of the current keys. This is helpful for administrators who
want to change the OSPF password without disrupting communication. The
system begins a rollover process until all the neighbors have adopted the new
password. This allows neighboring routers to continue communication while the
network administrator is updating them with a new password. The router will stop
sending duplicate packets once it detects that all of its neighbors have adopted
the new password.
Maintain only one password per interface, removing the old password whenever
you add a new one. This will prevent the local system from continuing to
communicate with the system that is using the old password. Removing the old
password also reduces overhead during rollover. All neighboring routers on the
same network must have the same password value to enable exchange of OSPF
routing data.
Parameter Description
<ip-address> The IPv4 address of the interface, in dotted decimal notation.
<key-id> A key ID number specified as an integer between 1 and 255.
md5 Use the MD5 algorithm.
<pswd-long> The OSPF password. This is a string of 1 to 16 characters including
spaces.
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