Client unable to get DHCP IP from 871W

Answered Question
May 12th, 2010
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Hi,


I am playing around with an 871W router and have setup a local dhcp pool:


ip dhcp pool LAN_DHCP

     import all

     network 10.10.10.0 255.255.255.0

     default-router 10.10.10.1


The laptop connected to it isn't able to receive an IP.


Here is what I am seeing in the logs:


*Feb 28 21:19:16.963 CST: DHCPD: Sending notification of DISCOVER:
*Feb 28 21:19:16.963 CST:   DHCPD: htype 1 chaddr 001d.0937.a90d
*Feb 28 21:19:16.963 CST:   DHCPD: remote id 020a00000a190001f1000000
*Feb 28 21:19:16.963 CST:   DHCPD: circuit id 00000000
*Feb 28 21:19:16.963 CST: DHCPD: DHCPDISCOVER received from client 0100.1d09.37a9.0d on interface BVI1.
*Feb 28 21:19:16.963 CST: DHCPD: Seeing if there is an internally specified pool class:
*Feb 28 21:19:16.963 CST:   DHCPD: htype 1 chaddr 001d.0937.a90d
*Feb 28 21:19:16.963 CST:   DHCPD: remote id 020a00000a190001f1000000
*Feb 28 21:19:16.963 CST:   DHCPD: circuit id 00000000
*Feb 28 21:19:16.963 CST: DHCPD: Allocate an address without class information (10.10.10.0)
*Feb 28 21:19:16.963 CST: DHCPD: subnet [10.10.10.1,10.10.10.254] in address pool LAN_DHCP is empty.
*Feb 28 21:19:16.963 CST: DHCPD: Sending notification of ASSIGNMENT FAILURE:
*Feb 28 21:19:16.963 CST:   DHCPD: htype 1 chaddr 001d.0937.a90d
*Feb 28 21:19:16.963 CST:   DHCPD: remote id 020a00000a190001f1000000
*Feb 28 21:19:16.963 CST:   DHCPD: circuit id 00000000
*Feb 28 21:19:16.963 CST: DHCPD: Sending notification of ASSIGNMENT_FAILURE:
*Feb 28 21:19:16.963 CST:  DHCPD: due to: POOL EXHAUSTED
*Feb 28 21:19:16.963 CST:   DHCPD: htype 1 chaddr 001d.0937.a90d
*Feb 28 21:19:16.963 CST:   DHCPD: remote id 020a00000a190001f1000000
*Feb 28 21:19:16.963 CST:   DHCPD: circuit id 00000000



There is only my laptop connected to it and it's not connected to the Internet.


Any assistance would be appreciated!


Thanks,

Lily

Correct Answer by Jerry Ye about 6 years 10 months ago

Change your config to the following and try again


ip dhcp excluded-address 10.10.10.1 10.10.10.X
ip dhcp smart-relay

!

ip dhcp pool LAN_DHCP

     network  10.10.10.0 255.255.255.0

     default-router 10.10.10.1

!


Regards,

jerry

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Correct Answer
Jerry Ye Wed, 05/12/2010 - 08:09
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  • Cisco Employee,

Change your config to the following and try again


ip dhcp excluded-address 10.10.10.1 10.10.10.X
ip dhcp smart-relay

!

ip dhcp pool LAN_DHCP

     network  10.10.10.0 255.255.255.0

     default-router 10.10.10.1

!


Regards,

jerry

Mehdi Talei Tue, 09/10/2013 - 04:56
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Hello,


Adding the line fixes the issue, but why that happens at all!

There should be a bug somewhere that there are plenty of IP addresses available and the router is not able to attribute any! I can't find the bug on Cisco website though!

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