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Community Member

DHCP Reservation Problem

I have the following problem:

I have created 3 DHCP pools (see below).

ip dhcp pool sdm-IRB1-Pool-AirTraffic

host 10.0.0.250 255.255.255.0

hardware-address 0100.19d1.7fcc.26

default-router 10.0.0.254

dns-server 194.x.x.100 194.168.8.100

domain-name oxfd.cable.ntl.com

client-name AirTraffic

!

ip dhcp pool sdm-IRB1-Pool-Aviator-3G

host 10.0.0.251 255.255.255.0

hardware-address 0100.21e9.2a34.ce

default-router 10.0.0.254

dns-server 194.168.4.100 194.168.8.100

domain-name oxfd.cable.ntl.com

client-name Aviator-3G

!

ip dhcp pool sdm-IRB1-Pool

network 10.0.0.0 255.255.255.0

dns-server 194.168.4.100 194.168.8.100

default-router 10.0.0.254

domain-name oxfd.cable.ntl.com

I am trying to map the dhcp leases for the AirTraffic and Aviator-3G clients to specific IP addresses.

The problem is that when the client attaches to the network they fail to receive the reserved IP address and instead receive an IP address from the main pool “sdm-IRB1-Pool”. I have tried removing the “sdm-IRB1-Pool” but this fails to give the client an IP address allocation.

When the client attaches to the network the follow debug output is created.

000535: Jan 22 19:23:55.424 London: %DOT11-6-DISASSOC: Interface Dot11Radio0/0/0, Deauthenticating Station 0021.e92a.34ce Reason: Sending station has left the BSS SSID[avenue]

000536: Jan 22 19:24:00.952 London: %DOT11-6-ASSOC: Interface Dot11Radio0/0/0, Station 0021.e92a.34ce Associated SSID[avenue] AUTH_TYPE[OPEN] KEY_MGMT[WPAv2 PSK]

000537: Jan 22 19:24:01.284 London: DHCPD: DHCPREQUEST received from client 0100.21e9.2a34.ce.

000538: Jan 22 19:24:01.284 London: DHCPD: Sending notification of ASSIGNMENT:

000539: Jan 22 19:24:01.284 London: DHCPD: address 10.0.0.2 mask 255.255.255.0

000540: Jan 22 19:24:01.284 London: DHCPD: htype 1 chaddr 0021.e92a.34ce

000541: Jan 22 19:24:01.284 London: DHCPD: lease time remaining (secs) = 86400

000542: Jan 22 19:24:01.284 London: DHCPD: Appending default domain from pool

000543: Jan 22 19:24:01.284 London: DHCPD: Using hostname 'Aviator-3G.oxfd.cable.ntl.com.' for dynamic update (from hostname option)

000544: Jan 22 19:24:01.284 London: DHCPD: Sending DHCPACK to client 0100.21e9.2a34.ce (10.0.0.2).

000545: Jan 22 19:24:01.284 London: DHCPD: creating ARP entry (10.0.0.2, 0021.e92a.34ce, vrf 0).

000546: Jan 22 19:24:01.288 London: DHCPD: unicasting BOOTREPLY to client 0021.e92a.34ce (10.0.0.2).

A complete copy of the running config is attached.

Any help would be much appreciated.

1 ACCEPTED SOLUTION

Accepted Solutions
Bronze

Re: DHCP Reservation Problem

Daniel-

Instead of using the hardware-address line, replace it with "client-identifier" instead, so

client-identifier 0100.19d1.7fcc.26

etc.

HTH,

Paul

2 REPLIES
Bronze

Re: DHCP Reservation Problem

Daniel-

Instead of using the hardware-address line, replace it with "client-identifier" instead, so

client-identifier 0100.19d1.7fcc.26

etc.

HTH,

Paul

Community Member

Re: DHCP Reservation Problem

Many thanks Paul. That worked straight away!!

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