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 X accepts and attempts to verify the MD5 digest of any EIGRP packets with a
key ID equal to 1. Router X will also accept a packet with a key ID equal to 2. All other MD5
packets are dropped. Router X sends all EIGRP packets using key 2 because key 1 is no longer
valid for use in sending packets.
Example 5-7 shows the con?¬?guration of EIGRP MD5 authentication for Router Y in Figure 5-7.
send-lifetime 04:00:00 Jan 1 2006 infinite