cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
1934
Views
0
Helpful
4
Replies

DHCP not working on Cisco 877W

matt.calvert
Level 1
Level 1

I have a Cisco 877W in place with an ADSL connection, which is working fine.  However I cannot get it to hand out a DHCP address.  If I associate with the AP over wireless then set a static IP I have full connectivity, similarly if I connect over Eth0 and set a static IP I have full connectivity.  So it does just seem to be DHCP.  Below shows my config... Any thoughts on the issue?  Is it access-list related?

I have checked with Wireshark and I see the DHCP request being sent out, but I don't see a DHCP offer being returned

Thanks

version 12.4

no service pad

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname cisco-router1

!

boot-start-marker

boot-end-marker

!

logging buffered 51200 warnings

enable secret 5 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

!

aaa new-model

!

!

aaa authentication login default local

aaa authorization exec default local

aaa authorization network default local

!

aaa session-id common

!

resource policy

!

clock timezone London 0

no ip subnet-zero

ip cef

ip dhcp use vrf connected

ip dhcp excluded-address 192.168.99.1 192.168.99.64

!

ip dhcp pool home

   network 192.169.99.0 255.255.255.0

   domain-name Wireless.local

   dns-server 192.168.99.1

   default-router 192.168.99.1

   lease infinite

!

!

ip domain name Wireless.local

ip name-server 8.8.8.8

ip name-server 8.8.4.4

ip ssh version 2

!

!

bridge irb

!

!

interface ATM0

no ip address

no ip redirects

no ip unreachables

no ip proxy-arp

no atm ilmi-keepalive

dsl operating-mode auto

dsl enable-training-log

!

interface ATM0.1 point-to-point

description Link to O2

ip address 94.192.245.80 255.255.248.0

ip nat outside

ip virtual-reassembly

atm route-bridged ip

pvc 0/101

  oam-pvc manage

  encapsulation aal5snap

!

!

interface FastEthernet0

spanning-tree portfast

!

interface FastEthernet1

!

interface FastEthernet2

!

interface FastEthernet3

!

interface Dot11Radio0

no ip address

!

encryption mode ciphers tkip

!

encryption vlan 1 key 1 size 128bit 0 xxxxxxxxxxxxxxxxxxxxxxxxxx transmit-key

encryption vlan 1 mode ciphers wep128

!

ssid Wireless

    vlan 1

    authentication open

    accounting acct_methods

    guest-mode

    infrastructure-ssid optional

!

speed basic-18.0 basic-24.0 basic-36.0 basic-48.0 basic-54.0

station-role root

bridge-group 1

bridge-group 1 subscriber-loop-control

bridge-group 1 block-unknown-source

no bridge-group 1 source-learning

no bridge-group 1 unicast-flooding

!

interface Dot11Radio0.1

encapsulation dot1Q 1 native

no snmp trap link-status

no cdp enable

bridge-group 1

bridge-group 1 subscriber-loop-control

bridge-group 1 spanning-disabled

bridge-group 1 block-unknown-source

no bridge-group 1 source-learning

no bridge-group 1 unicast-flooding

!

interface Vlan1

no ip address

bridge-group 1

!

interface BVI1

description local range

ip address 192.168.99.1 255.255.255.0

ip nat inside

ip virtual-reassembly

!

ip classless

ip route 0.0.0.0 0.0.0.0 94.192.240.1

!

no ip http server

no ip http secure-server

ip nat inside source list 1 interface ATM0.1 overload

ip dns server

!

access-list 1 permit 192.168.99.0 0.0.0.255

access-list 102 permit udp host 0.0.0.0 host 255.255.255.255

!

control-plane

!

bridge 1 protocol ieee

bridge 1 route ip

!

line con 0

no modem enable

line aux 0

line vty 0 4

access-class 1 in

privilege level 15

transport input ssh

!

scheduler max-task-time 5000

ntp clock-period 17175141

ntp server 85.234.136.65

ntp server 94.228.40.3

ntp server 82.113.154.206

ntp server 178.32.175.244

1 Accepted Solution

Accepted Solutions

There is a typo in the network- IP-address: 169 instead of 168:

ip dhcp pool home

   network 192.169.99.0 255.255.255.0

-- 
Don't stop after you've improved your network! Improve the world by lending money to the working poor:
http://www.kiva.org/invitedby/karsteni

View solution in original post

4 Replies 4

Hi

Try using debugs and maybe see what the problem might be.

debug ip dhcp server events

debug ip dhcp server packets

"lese infinite" is a bit drastic ey? Maybe the pool has run out.

There is a typo in the network- IP-address: 169 instead of 168:

ip dhcp pool home

   network 192.169.99.0 255.255.255.0

-- 
Don't stop after you've improved your network! Improve the world by lending money to the working poor:
http://www.kiva.org/invitedby/karsteni

matt.calvert
Level 1
Level 1

Thanks guys. Turns out its true that sometimes you can't see the wood for the trees! Corrected the typo and I'm getting DHCP leases as expected...

Out of interest Henrik, how would I see the logs that are produced by these commands?

debug ip dhcp server events

debug ip dhcp server packets

Out of interest Henrik, how would I see the logs that are produced by these commands?

If you are connected to the router with SSH or Telnet, then you have to issue "terminal monitor" to see all the logs that are normally only shown on the console.

-- 
Don't stop after you've improved your network! Improve the world by lending money to the working poor:
http://www.kiva.org/invitedby/karsteni

Review Cisco Networking products for a $25 gift card