Problem with default router via Static DHCP

dmitry.bedov · ‎04-16-2007

Hi all!

Here is a problem with static DHCP. I have 2 DHCP pools on a router for 2 ethernet subinterfaces:

ip dhcp pool First_Insurance

network 192.168.2.0 255.255.255.0

default-router 192.168.2.1

ip dhcp pool Netassets

network 192.168.4.0 255.255.255.0

default-router 192.168.4.1

interface FastEthernet0/1.2

description First_Insurance

encapsulation dot1Q 2

ip address 192.168.2.1 255.255.255.0

ip access-group First_Insurance_in in

ip nat inside

ip virtual-reassembly

no cdp enable

!

interface FastEthernet0/1.4

description Netassets

encapsulation dot1Q 4

ip address 192.168.4.1 255.255.255.0

ip access-group Netassets_in in

ip nat inside

ip virtual-reassembly

no cdp enable

!

Also there is DHCP pool for binding IP to MAC:

ip dhcp pool Static

origin file tftp://xxx.xxx.xxx.xxx/dhcp/static.txt

TFTP server contains a file with MAC-IP mapping, for example:

192.168.4.2 /24 id 0100.0d61.4520.e3 Infinite

But when a workstation with MAC 000d.6145.20e3 try to obtain information via DHCP it receive address 192.168.4.2 and default router 192.168.2.1!

Where is a problem??

Anand Narayana · ‎04-16-2007

can you juz release release & renew the ip address on the workstation, also try clearing the dhcp binding database.

in workstation

--------------

ipconfig /release

ipconfig /renew

in router

---------

router#clear ip dhcp binding *

where * meanz clear all bounded ip addresses.

also i could never see any gateway information in the tftp server mapped file i.e static.txt

dmitry.bedov · ‎04-17-2007

Ofcourse, i've try to release and renew on workstation - no effect. Same effect from clear ip dhcp binding * and from no service dhcp - ser vice dhcp. Debug DHCP shows this:

Apr 17 10:48:57.952: DHCPD: Sending notification of DISCOVER:

Apr 17 10:48:57.952: DHCPD: htype 1 chaddr 0013.4622.1eda

Apr 17 10:48:57.952: DHCPD: remote id 020a0000c0a8050101000005

Apr 17 10:48:57.952: DHCPD: circuit id 00000000

Apr 17 10:48:57.952: DHCPD: Seeing if there is an internally specified pool class:

Apr 17 10:48:57.952: DHCPD: htype 1 chaddr 0013.4622.1eda

Apr 17 10:48:57.952: DHCPD: remote id 020a0000c0a8050101000005

Apr 17 10:48:57.952: DHCPD: circuit id 00000000

Apr 17 10:48:57.952: DHCPD: child pool: 192.168.2.2 / 255.255.255.0 (Static)

Apr 17 10:48:57.952: DHCPD: parent pool: 192.168.2.0 / 255.255.255.0 (First_Insurance)

Apr 17 10:48:57.952: DHCPD: child pool: 192.168.2.0 / 255.255.255.0 (First_Insurance)

Apr 17 10:48:57.952: DHCPD: pool First_Insurance has no parent.