Step 2 Use the key command to identify a key ID to use, and enter con?¬?guration
mode for that key. The value provided for the key-id parameter of the key
command indicates the ID number of an authentication key on a key chain.
The range of keys is from 0 to 2147483647. The key ID numbers need not
be consecutive.
Step 3 Use the key-string command to identify the key string (password) for this
key. The value provided for the text parameter of the key-string command
indicates the authentication string that is to be used to authenticate sent and
received EIGRP packets. The string can contain from 1 to 80 uppercase and
lowercase alphanumeric characters. The ?¬?rst character cannot be a number,
and the string is case sensitive.
Step 4 Optionally, use accept-lifetime to specify the time during which this key is
accepted for use on received packets. If you do not enter an accept-lifetime
command, the time is in?¬?nite. Table 5-7 describes the accept-lifetime
command parameters.
NOTE The routers must know the correct time to rotate through keys in synchronization with
the other participating routers. This ensures that all the routers are using the same key at the
same moment.
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