MD5 and Clear Authentication

MD5 Authentication on R1 and R4 directly connected interface

Before doing the authentication check the router clock

R4#sh clock

02:45:05.509 UTC Fri Mar 1 2002

R4#sh run | sec key

key chain CISCO

 key 1

  key-string CCIE

  accept-lifetime 02:55:00 Mar 1 2002 03:00:00 Mar 1 2002

  send-lifetime 02:55:00 Mar 1 2002 03:00:00 Mar 1 2002

!

interface Serial0/1

 ip address 155.1.114.4 255.255.255.0

 ip authentication mode eigrp 100 md5

 ip authentication key-chain eigrp 100 CISCO

 serial restart-delay 0

end

R1#sh run | sec key

key chain CISCO

 key 1

  key-string CCIE

  accept-lifetime 02:55:00 Mar 1 2002 03:00:00 Mar 1 2002

  send-lifetime 02:55:00 Mar 1 2002 03:00:00 Mar 1 2002

!

interface Serial0/1

 ip address 155.1.114.1 255.255.255.0

 ip authentication mode eigrp 100 md5

 ip authentication key-chain eigrp 100 CISCO

 serial restart-delay 0

end

R4#sh clock

02:48:27.543 UTC Fri Mar 1 2002

R4#sh ip eigrp ne

IP-EIGRP neighbors for process 100

H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq

                                            (sec)         (ms)       Cnt Num

2   155.1.14.1              Se0/0.41          14 02:26:18  371  2226  0  228

1   155.1.42.2              Fa1/0             11 02:26:19  180  1080  0  40

R4#sh clock

02:55:01.543 UTC Fri Mar 1 2002

R4#sh ip eigrp ne

IP-EIGRP neighbors for process 100

H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq

                                            (sec)         (ms)       Cnt Num

0   155.1.114.1             Se0/1             14 00:00:14  212  1272  0  237

2   155.1.14.1              Se0/0.41          10 02:33:03  314  1884  0  234

1   155.1.42.2              Fa1/0             14 02:33:03  156   936  0  40