The ip authentication key-chain eigrp 100 RouterYchain command
speci?¬?es that the key chain RouterYchain is to be used for EIGRP AS 100.
The key chain RouterYchain command enters con?¬?guration mode for the RouterYchain key
chain. Two keys are de?¬?ned. Key 1 is set to ????¬?rst key??? with the key-string ?¬?rstkey command. This
key is acceptable for use on packets that are received by Router Y from 4:00 a.m. (0400) on
January 1, 2006, onward, as speci?¬?ed in the accept-lifetime 04:00:00 Jan 1 2006 in?¬?nite
command. This key can also be used when packets are sent from 4:00 a.m. (0400) on January 1,
2006, onward, as speci?¬?ed in the send-lifetime 04:00:00 Jan 1 2006 in?¬?nite command.
Key 2 is set to ???second key??? with the key-string secondkey command. This key is acceptable for
use on packets that are received by Router Y from 4:00 a.m. (0400) on January 1, 2006, onward,
as speci?¬?ed in the accept-lifetime 04:00:00 Jan 1 2006 in?¬?nite command. This key can also be
used when packets are sent from 4:00 a.m. (0400) on January 1, 2006, onward, as speci?¬?ed in the
send-lifetime 04:00:00 Jan 1 2006 in?¬?nite command.
Therefore, Router Y accepts and attempts to verify the MD5 digest of any EIGRP packets with a
key ID equal to 1 or 2.
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