Re: Cisco 851 Router, WLAN configuration

voytechp420 · ‎11-24-2006

Hello everyone,

I purchased a Cisco router 851 with intergrated wireless AP. I was able to configure the LAN but I can't get the WLAN to work. I was googling for it all over the place, I did a lot of configs that cisco.com has and still nothing. I have 2 wireless computers running Win XP and they don't detect any WLANs, the WLAN(OK) LED on the router is blinking.

This router has 4 FastEthernet interfaces and one Dot11Radio0, Vlan1 and BVI1, ... here's another question, if I want to set up a LAN and WLAN which interface (Vlan1 or BVI1) should have the ip address?

I configured the router so that Vlan1 has IP address: 10.0.0.1 255.0.0.0 I enabled NAT and DHCP and that works fine (but this is only for LAN configuration)... However in the sample configs for WLAN that I found on cisco, it shows that BVI1 has the IP address and Vlan1 does not... This is how my network looks like (I have the modem from my ISP)

http://i.i.com.com/cnwk.1d/i/tr/downloads/images/cisco_871/cisco_871_a.png

Please help and I apologize for posting such ridiculous questions

jackyoung · ‎11-24-2006

It looks like the Router/AP did not broadcast the SSID, can you check it or use some scanner to scan the AP ? e.g. Netsumbler

Did check below doc. and sample ?

http://www.cisco.com/en/US/products/hw/routers/ps380/products_configuration_guide_chapter09186a008045d289.html#wp79536

According to the sample as above, the ip address should be configured at BVI and VLAN will be bridged with the radio interface.

Please post the config and it is easier to troubleshoot the problem.

Hope this helps.

voytechp420 · ‎11-25-2006

Hello

Thank you for your reply. Here's the config:

!

version 12.4

no service pad

service timestamps debug datetime msec

service timestamps log datetime msec

service password-encryption

!

hostname cisco

!

boot-start-marker

boot-end-marker

!

enable secret 5 $1$w1FR$TQnOIJhFdFukc.dthkgFY1

enable password 7 071D285A4F

!

no aaa new-model

!

resource policy

!

ip subnet-zero

no ip dhcp use vrf connected

ip dhcp excluded-address 10.0.0.1

!

ip dhcp pool LAN

import all

network 10.0.0.0 255.0.0.0

dns-server xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx

default-router 10.0.0.1

lease 10

!

ip cef

ip name-server 194.xxx.xxx.xxx

!

interface FastEthernet0

!

interface FastEthernet1

!

interface FastEthernet2

!

interface FastEthernet3

!

interface FastEthernet4

ip address 83.xxx.xxx.xxx 255.xxx.xxx.xxx

ip nat outside

ip virtual-reassembly

duplex auto

speed auto

no cdp enable

!

interface Dot11Radio0

no ip address

shutdown

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

!

interface Vlan1

ip address 10.0.0.1 255.0.0.0

ip nat inside

ip virtual-reassembly

!

ip classless

ip route 0.0.0.0 0.0.0.0 83.xxx.xxx.xxx

!

ip http server

ip http secure-server

ip nat inside source list 1 interface FastEthernet4 overload

!

access-list 1 permit 10.0.0.0 0.255.255.255

!

control-plane

!

line con 0

no modem enable

line aux 0

line vty 0 4

!

scheduler max-task-time 5000

end

In this config, the Radio interface is disabled. Thank you very much...

voytechp420 · ‎11-25-2006

Please ignore the previous config.... This is the current configuration that includes WLAN config:

version 12.4

no service pad

service timestamps debug datetime msec

service timestamps log datetime msec

service password-encryption

!

hostname cisco

!

boot-start-marker

boot-end-marker

!

enable secret xxx

enable password xxx

!

no aaa new-model

!

resource policy

!

ip subnet-zero

no ip dhcp use vrf connected

ip dhcp excluded-address 10.0.0.1

!

ip dhcp pool LAN

import all

network 10.0.0.0 255.0.0.0

dns-server 194.xxx.xxx.xxx 194.xxx.xxx.x

default-router 10.0.0.1

lease 10

!

ip cef

ip name-server 194.xxx.xxx.xxx

ip name-server 194.xxx.xxx.x

bridge irb

!

interface FastEthernet0

!

interface FastEthernet1

!

interface FastEthernet2

!

interface FastEthernet3

!

interface FastEthernet4

ip address 83.xx.xxx.xxx 255.255.255.xxx

ip nat outside

ip virtual-reassembly

duplex auto

speed auto

no cdp enable

!

interface Dot11Radio0

no ip address

broadcast-key vlan 1 change 45

!

encryption vlan 1 mode ciphers tkip

!

ssid wireless

vlan 1

authentication open

authentication network-eap voytech

authentication key-management wpa

!

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

rts threshold 2312

station-role root

!

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

ip virtual-reassembly

bridge-group 1

bridge-group 1 spanning-disabled

!

interface BVI1

ip address 10.0.0.1 255.0.0.0

ip nat inside

ip virtual-reassembly

!

ip classless

ip route 0.0.0.0 0.0.0.0 83.xx.xxx.xxx

!

ip http server

ip http secure-server

ip nat inside source list 1 interface FastEthernet4 overload

!

access-list 1 permit 10.0.0.0 0.255.255.255

control-plane

!

line con 0

no modem enable

line aux 0

line vty 0 4

!

scheduler max-task-time 5000

end

I installed the Network Stumber but it does not detect any SSIDs... what can be wrong?

jackyoung · ‎11-26-2006

Referring to the link of the sample config. of wireless section, there is no issue on the provided config. I suspect it may be the hardware issue. What is the IOS running on this router ? You may consider to upgrade the IOS and open a tac case w/ Cisco to investigate the radio problem.

For the overall configuration, you can refer to the link that I provided at the bottom, there is a full sample config. w/ both VLAN and BVI are used, VLAN for LAN and BVI for the radio.

Hope this helps.

voytechp420 · ‎11-27-2006

Thanks for the help, I got it working :)

jackyoung · ‎11-27-2006

It is great if it works now. Could you tell what have you done to make it work ? Or what is the problem to make not work ? Many thx. :)

voytechp420 · ‎11-28-2006

Thanks jack, the config that I posted was totally fine, all I had to do is to add "guest-mode" to the Dot11Radio0 interface in SSID mode...

Thanks again.

Cisco rulez :)

jackyoung · ‎11-28-2006

Thx. for the update. Enjoy ~ ;)