Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations Westi on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!

Wireless clients of Cisco 851W not receiving IPs from DHCP server

Status
Not open for further replies.

JonH7

IS-IT--Management
Apr 21, 2010
3
US
I previously used this Cisco 851W as my router, now I am trying to reconfigure it to just be a switch and wireless access point. To do this I deleted the DHCP server settings from the config as I no loger want it to be my DHCP server. I want the clients of it to use the existing DHCP server on my network. The network is all one class C subnet. What I have found now is when I connect to the wireless I do not receive an IP. I was thinking maybe I need to set it up as a DHCP relay, but I don't think that's right as its all one network.

My current config is below. I apologize that my Cisco knowledge is pretty weak, any advice is greatly appreciated. Thanks

Current configuration : 3190 bytes
!
version 12.3
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname SomeRouterName
!
boot-start-marker
boot-end-marker
!
!
aaa new-model
!
!
aaa authentication login default local
aaa authorization exec default local
aaa session-id common
ip subnet-zero
!
!
ip cef
ip inspect name MYFW tcp
ip inspect name MYFW udp
no ip domain lookup
ip domain name home.local
no ftp-server write-enable
!
!
!
!
!
bridge irb
!
!
interface FastEthernet0
no ip address
spanning-tree portfast
!
interface FastEthernet1
no ip address
spanning-tree portfast
!
interface FastEthernet2
no ip address
spanning-tree portfast
!
interface FastEthernet3
no ip address
spanning-tree portfast
!
interface FastEthernet4
ip address dhcp
ip access-group Internet-inbound-ACL in
ip inspect MYFW out
ip nat outside
ip virtual-reassembly
ip tcp adjust-mss 1460
duplex auto
speed auto
no cdp enable
!
interface Dot11Radio0
no ip address
!
encryption vlan 1 mode ciphers tkip
!
encryption vlan 20 mode ciphers tkip
!
ssid NewWirelessInterweb
vlan 1
authentication open
authentication key-management wpa
guest-mode
wpa-psk ascii 7 *************************
!
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0
54.0
channel 2412
station-role root
no dot11 extension aironet
no cdp enable
!
interface Dot11Radio0.1
encapsulation dot1Q 1 native
shutdown
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 Dot11Radio0.20
description Guest wireless LAN - routed WLAN
encapsulation dot1Q 20
ip address 192.168.2.1 255.255.255.0
ip access-group Guest-ACL in
ip inspect MYFW out
ip nat inside
ip virtual-reassembly
!
interface Vlan1
description Internal Network
no ip address
ip nat inside
ip virtual-reassembly
bridge-group 1
bridge-group 1 spanning-disabled
!
interface BVI1
description Bridge to Internal Network
ip address 192.168.0.3 255.255.255.0
ip nat inside
ip virtual-reassembly
!
ip classless
ip route 0.0.0.0 0.0.0.0 dhcp
!
ip http server
ip http secure-server
ip nat inside source list 1 interface FastEthernet4 overload
!
ip access-list extended Guest-ACL
deny ip any 192.168.1.0 0.0.0.255
permit ip any any
ip access-list extended Internet-inbound-ACL
permit udp any eq bootps any eq bootpc
permit icmp any any echo
permit icmp any any echo-reply
permit icmp any any traceroute
permit gre any any
permit esp any any
!
access-list 1 permit 192.168.1.0 0.0.0.255
access-list 1 permit 192.168.2.0 0.0.0.255
!
control-plane
!
bridge 1 route ip
!
line con 0
password 7 03054E0C545E
no modem enable
transport preferred all
transport output all
line aux 0
transport preferred all
transport output all
line vty 0 4
password 7 ***************
transport preferred all
transport input all
transport output all
!
scheduler max-task-time 5000
end
 
For starters, it isn't all one subnet, you have 3 there.

A few other things:

- You have no ethernet interfaces associated with VLAN20.

- You have the radio associated with VLAN1 shut down.

- You've got an IP address on VLAN 20 radio.

- You have no VLAN 20 interface.

- You have no BVI for VLAN 20.

Maybe get this working with one radio/VLAN/BVI first before adding in the other config.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top