Technical information

ADC Telecommunications, Inc.
194 CHAPTER 2: CUDA 12000 BASE SYSTEM COMMANDS
Arguments
md5 Specifies that the OSPF interface uses MD5 authentication. MD5
authentication employs a shared secret key to generate a message digest,
which is a 128-bit checksum of the packet and key. When a router sends a
packet, it includes:
■ The message digest
■ A key ID that identifies the key that generated the message digest
At first, the receiving router accepts any packet that contains a key ID that
matches one of its own key IDs. Using this key ID, the receiving router
looks up the key. The receiving router uses the key associated with the
received key ID to replace the message digest in the packet and generates
a new message digest. If the generated message digest matches the
message digest in the received packet, then the router accepts the packet.
Otherwise, the router rejects the packet.
For more information on MD5 authentication, see RFC 1321 (The MD5
Message-Digest Algorithm) and RFC 2328 (OSPF Version 2), which
provides information on how MD5 authentication is used with OSPF.
If you specify md5 as the authentication type, you must subsequently
specify the shared secret key with the key-id <id> key <key> argument.
password Specifies a simple password authentication method that includes a
password in all OSPF messages. When an interface receives a message that
uses simple password authentication, the Cuda 12000 checks the
incoming OSPF message to see if the password is included. If the password
is correct, the Cuda 12000 processes the message normally. If the
password is not part of the incoming message, the Cuda 12000 drops the
message.
If you specify password as the authentication type, you must subsequently
specify the password with the key <key> argument.
key-id <id> key
<key>
Specifies the md5 key ID and shared secret key:
■ key-id <id> – An integer ranging from 1 to 255. This value identifies the
shared secret key.
■ key <key> – Specifies the key, which is a text string from 1 to 16
characters.
key <key> Specifies the simple password, which is a text string from 1 to 16
characters.