From: Antonio Soares (amsoares@netcabo.pt)
Date: Mon Jul 09 2007 - 21:52:05 ART
Hello group,
Noticed a strange thing and don't know how to explain it. A few seconds
after i assign an IP address to an interface, i see the router sending DHCP
Discover messages:
+++++++++++++++++++++++++++++++
R1#sh clock
*00:23:34.213 UTC Mon Mar 1 1993
R1#
R1#
R1#deb ip pa de
IP packet debugging is on (detailed)
R1#
R1#
R1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#
R1(config)#int e1/0
R1(config-if)#
R1(config-if)#no shut
R1(config-if)#
*Mar 1 00:23:48.998: %LINK-3-UPDOWN: Interface Ethernet1/0, changed state
to up
*Mar 1 00:23:49.999: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Ethernet1/0, changed state to up
R1(config-if)#
R1(config-if)#ip add 1.1.1.1 255.255.255.0
R1(config-if)#
R1(config-if)#
R1(config-if)#
*Mar 1 00:24:51.728: IP: s=0.0.0.0 (Ethernet1/0), d=255.255.255.255, len
576, rcvd 2
*Mar 1 00:24:51.728: UDP src=68, dst=67
R1(config-if)#
*Mar 1 00:24:55.727: IP: s=0.0.0.0 (Ethernet1/0), d=255.255.255.255, len
576, rcvd 2
*Mar 1 00:24:55.731: UDP src=68, dst=67
R1(config-if)#
*Mar 1 00:25:03.728: IP: s=0.0.0.0 (Ethernet1/0), d=255.255.255.255, len
576, rcvd 2
*Mar 1 00:25:03.728: UDP src=68, dst=67
R1(config-if)#
*Mar 1 00:25:19.730: IP: s=0.0.0.0 (Ethernet1/0), d=255.255.255.255, len
576, rcvd 2
*Mar 1 00:25:19.730: UDP src=68, dst=67
R1(config-if)#
R1(config-if)#
R1(config-if)#do u all
All possible debugging has been turned off
R1(config-if)#
+++++++++++++++++++++++++++++++
How to explain this ? This is exactly what we get when we configure "ip add
dhcp". Got the same bahaviour on 12.3 and 12.4 releases.
Thanks,
Antonio
This archive was generated by hypermail 2.1.4 : Sat Aug 18 2007 - 08:17:40 ART