Issues with DHCP server on Cisco 1841

[radiomean]

Hi, this is a simple issue but I have been looking at documentation and I can't get anywhere so I will ask the experts...

I am setting up a DHCP server on an 1841 router with a HWIC-AP-AG card. It's running IOS 15.1(3)T2 adventerprise with 256 Mb of ram.

((I know it's all old tech but I have my reasons!))

I am simply using the HWIC-AP card as an access point. I have manually assigned an IP address of 192.168.2.1 to the g wireless and 192.168.5.1 to the a wireless.

I've configured the following DHCP pool:

no ip dhcp conflict logging
ip dhcp excluded-address 192.168.2.1 192.168.2.32
!
ip dhcp pool two
network 192.168.2.0 255.255.255.0
default-router 192.168.2.1
dns-server 8.8.8.8 8.8.4.4
domain-name ****.com
lease 0 2
!

I can associate a laptop fine and access the router using static IP but when I try to use DHCP an address is briefly assigned, then declined and a self-determined IP appears on the laptop. And the next IP address is then assigned and so on...

The output of the DHCP server is below:

*Aug 17 22:03:10.226: %DOT11-6-ASSOC: Interface Dot11Radio0/1/0, Station c49d.ed07.06aa Associated SSID[ciscotest2] AUTH_TYPE[OPEN] KEY_MGMT[NONE]
*Aug 17 22:03:14.826: DHCPD: client's VPN is .
*Aug 17 22:03:14.826: DHCPD: Sending notification of DISCOVER:
*Aug 17 22:03:14.826: DHCPD: htype 1 chaddr c49d.ed07.06aa
*Aug 17 22:03:14.826: DHCPD: remote id 020a0000c0a8020101000000
*Aug 17 22:03:14.826: DHCPD: circuit id 00000000
*Aug 17 22:03:14.826: DHCPD: DHCPDISCOVER received from client 01c4.9ded.0706.aa on interface Dot11Radio0/1/0.
*Aug 17 22:03:14.826: DHCPD: Seeing if there is an internally specified pool class:
*Aug 17 22:03:14.826: DHCPD: htype 1 chaddr c49d.ed07.06aa
*Aug 17 22:03:14.826: DHCPD: remote id 020a0000c0a8020101000000
*Aug 17 22:03:14.826: DHCPD: circuit id 00000000
*Aug 17 22:03:14.830: DHCPD: Found previous server binding
*Aug 17 22:03:14.830: DHCPD: Sending DHCPOFFER to client 01c4.9ded.0706.aa (192.168.2.41).
*Aug 17 22:03:14.830: DHCPD: no option 125
*Aug 17 22:03:14.830: DHCPD: broadcasting BOOTREPLY to client c49d.ed07.06aa.
*Aug 17 22:03:14.858: DHCPD: client's VPN is .
*Aug 17 22:03:14.858: DHCPD: DHCPREQUEST received from client 01c4.9ded.0706.aa.
*Aug 17 22:03:14.858: DHCPD: Sending notification of ASSIGNMENT:
*Aug 17 22:03:14.858: DHCPD: address 192.168.2.41 mask 255.255.255.0
*Aug 17 22:03:14.858: DHCPD: htype 1 chaddr c49d.ed07.06aa
*Aug 17 22:03:14.858: DHCPD: lease time remaining (secs) = 7200
*Aug 17 22:03:14.858: DHCPD: Appending default domain from pool
*Aug 17 22:03:14.858: DHCPD: Using hostname 'DESKTOP-SURFACE.****.com.' for dynamic update (from FQDN option)
*Aug 17 22:03:14.858: DHCPD: Sending DHCPACK to client 01c4.9ded.0706.aa (192.168.2.41).
*Aug 17 22:03:14.858: DHCPD: no option 125
*Aug 17 22:03:14.858: DHCPD: broadcasting BOOTREPLY to client c49d.ed07.06aa.
*Aug 17 22:03:18.198: DHCPD: client's VPN is .
*Aug 17 22:03:18.198: DHCPD: DHCPDECLINE received from client 01c4.9ded.0706.aa.
*Aug 17 22:03:18.198: DHCPD: removing ARP entry (192.168.2.41 vrf default).
*Aug 17 22:03:18.198: DHCPD: Sending notification of TERMINATION:
*Aug 17 22:03:18.198: DHCPD: address 192.168.2.41 mask 255.255.255.0
*Aug 17 22:03:18.198: DHCPD: reason flags: DECLINE
*Aug 17 22:03:18.198: DHCPD: htype 1 chaddr c49d.ed07.06aa
*Aug 17 22:03:18.202: DHCPD: lease time remaining (secs) = 7196
*Aug 17 22:03:18.202: DHCPD: returned 192.168.2.41 to address pool two.

Advice is greatly received as to what I am doing wrong please?

Cheers, Bill

[balaji.bandi]

change the lease 0 2 to correct config :

lease {days [hours][minutes] | infinite}

some time may be due to bug may happens :

test with below and adjust accordingly - if that works

lease infinite

[Richard Burts]

If the suggestion about changing the lease does not solve the issue perhaps you might provide more details about the configuration of the 1841?

[radiomean]

Hi Richard,

The config is in a post further up...

But, I've changed the IOS to 15.1 (1) T and everything, including DHCP, is working.

I remember saying to a friend 'I thought Cisco didn't do bugs...' and he fell about laughing

I am finding plenty of bugs.

Cheers and thanks for the comments...

[radiomean]

Hi again, I seem to have accidentally generated two threads for this topic, hence my reply about the config - which is posted in the other thread. But it is now working, so thanks...

[balaji.bandi]

Glad all working - what what the fix, not sure about other thread, i was not part of it.

[radiomean]

As simple as using a different version of IOS...

I was using c1841-adventerprisek9-mz.151-3.T2 and it failed - I tried a 12.4 T version and it worked and then I tried c1841-adventerprisek9-mz.151-1.T which also worked!

Cheers!

[Richard Burts]

Thanks for the update. Glad to know that the issue appears to be just an issue with the version of code.