881W Not Broadcasting SSID

ciscoman2012 · April 2012

Well I already posted this in the CCENT/CCNA section but didn't get many replies. I'll try my luck out here as well.

I believe I have the right configs done on this router but the wireless isn't functioning at all. I don't see it broadcasting my SSID name.

I have zero physical antennas attached to it as it was given to me and they misplaced them. Do I absolutely need them for the router to perform wireless functions, or do they only extend the signal farther than a few feet? There are three spots for antennas on the rear of the router.

Here is the sh run of the 881W and the AP side:

W881#sh run
Building configuration...

Current configuration : 1699 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname W881
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
!
no aaa new-model
service-module wlan-ap 0 bootimage autonomous
!
!
ip source-route
!
!
ip dhcp excluded-address 192.168.1.1 192.168.1.99
ip dhcp excluded-address 192.168.1.201 192.168.1.254
!
ip dhcp pool myDHCPpool
import all
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 209.18.47.61 209.18.47.62
lease 5
!
!
ip cef
no ipv6 cef
!
!
multilink bundle-name authenticated
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface FastEthernet4
ip address dhcp
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
interface wlan-ap0
description Service module interface to manage the embedded AP
ip address 192.168.5.1 255.255.255.0
arp timeout 0
!
interface Wlan-GigabitEthernet0
description Internal switch interface connecting to the embedded AP
!
interface Vlan1
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 24.163.0.1
no ip http server
no ip http secure-server
!
!
ip nat inside source list 23 interface FastEthernet4 overload
!
access-list 23 permit 192.168.1.0 0.0.0.255
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
logging synchronous
no modem enable
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
line vty 0 4
login
!
scheduler max-task-time 5000
end

ap#sh run
Building configuration...

Current configuration : 3074 bytes
!
! Last configuration change at 18:47:08 UTC Thu Apr 20 1905 by cisco
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname ap
!
enable secret 5 $1$WUGQ$aLsDzNn44VA6wLmxZQqNe.
!
no aaa new-model
!
!
!
dot11 ssid CISCO NERD
!
dot11 ssid CISCO NERD vlan 1
authentication open
authentication key-management wpa
guest-mode
wpa-psk ascii 0 givemewifi
!
dot11 network-map
!
!
username cisco privilege 15 secret 5 $1$cA.0$b5p9.yql5i9eyhNiWYmf6/
!
bridge irb
!
!
interface Dot11Radio0
no ip address
no ip route-cache
!
encryption vlan 1 mode ciphers tkip
!
ssid CISCO NERD
!
station-role root
!
interface Dot11Radio0.1
encapsulation dot1Q 1 native
no ip route-cache
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
bridge-group 1 spanning-disabled
!
interface GigabitEthernet0
description the embedded AP GigabitEthernet 0 is an internal interface connecting AP with the host router
no ip address
no ip route-cache
!
interface GigabitEthernet0.1
encapsulation dot1Q 1 native
no ip route-cache
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
!
interface BVI1
ip address 192.168.1.2 255.255.255.0
no ip route-cache
!
ip default-gateway 192.168.1.1
ip http server
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779...onfig/help/eag
bridge 1 route ip

ciscoman2012 · April 2012

Well, I bought an antenna off amazon to see if it works. If it does work I'll buy two more and hopefully have a working 802.11n network!

LinuxRacr · April 2012

Very nice. Did any of the tutorials I linked help with the configuration, or did you find something better ? The reason I ask is that I am planning to set mine up soon.

ciscoman2012 · April 2012

Hmm, they were helpful in navigating through the 881W but other than that not so much.

These were the two sites I was looking at when trying to set up the 881W.

Dissecting The Cisco 881w ISR – Astorino Networks

Cisco 880W (881W, 886W, 887W, 888W) Multiple - Dual SSID Integrated Access Point Configuration

The Astorino Networks site is the config that I tried to use on the router. Tried it with no antennas at all...2.4GHz light on front of router was flashing at synchronized rate (I figure this isn't good as it should probably be solid..). I figured no big deal, I guess that means I need to order antennas. I decided to start with one and then if it worked buy another 2 for 3 antennas total.

Well, today I got the 1 antenna so I hooked it up to the router and loaded up. Nothing changed. Still, 2.4GHz light is flashing at a synchronized pattern and isn't solid..and no SSID being broadcasted to any of my machines.

Do I really need all 3 routers for the 881W to even broadcast an SSID? Even with a very weak signal? I wouldn't think so but maybe my 881W is just messed up or something.

**For those wondering this is the antenna I purchased from Amazon AIR-ANT4941

Amazon.com: Cisco Aironet 2.2dBi 2.4GHz Dipole Antenna (Standard Rubber Duck) with RP-TNC Connector ( AIR-ANT4941 ) (Black): Electronics

ciscoman2012 · April 2012

LinuxRacr wrote: »

Very nice. Did any of the tutorials I linked help with the configuration, or did you find something better ? The reason I ask is that I am planning to set mine up soon.

Forgot to add to my other post...

If you have the same router I'd be interested to see if yours broadcasts an SSID without any antennas. If so, then my router is currently messed up somehow.

LinuxRacr · April 2012

I'm having trouble picking up the SSID as well. When I get time I'm going to redo the configuration from the beginning. I was able to see a new network with no SSID, and I suspect that it was from the 881W....

LinuxRacr · April 2012

Ok, I finally got my 881W broadcasting and slinging out dhcp addressing via two separate SSID's, and with WPA 2! I learned some time-consuming configuration lessons in the process. Now I have to figure out the security aspects before I put it out in the DMZ....

LinuxRacr · April 2012

Ciscoman2012,

Here are a couple of things I think may help:

You need to trunk your Wlan-GigabitEthernet0 interface. By doing this, it will allow all vlans to trunk by default. At least if you don't trunk it, and since you are only using vlan1 you can get away with just doing a "switchport access vlan1". In order for your wireless to work, the traffic has to be able to get from the access point back to the router (to give out dhcp addresses) over this link. Right now it doesn't have a way.

Change this:
interface Wlan-GigabitEthernet0
description Internal switch interface connecting to the embedded AP

To this:
interface Wlan-GigabitEthernet0
description Internal switch interface connecting to the embedded AP
switchport mode trunk

Also for your Fasthernet4 interface:

interface FastEthernet4
ip address dhcp
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable <--Add this

And:

It looks like your IP for your wlan-ap0 console is on a different subnet from VLAN1:

interface wlan-ap0
description Service module interface to manage the embedded AP
ip address 192.168.5.1 255.255.255.0
arp timeout 0

Here is what I did with mine that makes it share the same IP as the Vlan1 interface (accept on port 2002):

interface wlan-ap0
description Service module interface to manage the embedded AP
ip unnumbered Vlan1
arp timeout 0

I'll probably post my configuration later.

LinuxRacr · April 2012

Here's my config in this thread: http://www.techexams.net/forums/off-topic/74982-cisco-881w-router-config-woes.html#post630134

ciscoman2012 · April 2012

Thanks for the suggestions. I tried them all in my configs and nothing seemed to work. I every erased the config from the device (both ap and 881w itself) before changing the commands.

Not sure where to go from here. I read on Cisco documentation that 2.4GHz flashing or blinking at all means it's broadcasting an SSID..

Still not working though so I dunno. Here is what I have currently:

CONFIG ON 881W ITSELF
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname W881
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
!
no aaa new-model
service-module wlan-ap 0 bootimage autonomous
!
!
ip source-route
!
!
ip dhcp excluded-address 192.168.1.1 192.168.1.99
ip dhcp excluded-address 192.168.1.201 192.168.1.254
!
ip dhcp pool myDHCPpool
import all
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 209.18.47.61 209.18.47.62
lease 5
!
!
ip cef
no ipv6 cef
!
!
multilink bundle-name authenticated
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface FastEthernet4
ip address dhcp
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
no cdp enable
!
interface wlan-ap0
description Service module interface to manage the embedded AP
ip unnumbered Vlan1
arp timeout 0
!
interface Wlan-GigabitEthernet0
description Internal switch interface connecting to the embedded AP
switchport mode trunk
!
interface Vlan1
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 24.163.0.1
no ip http server
no ip http secure-server
!
!
ip nat inside source list 23 interface FastEthernet4 overload
!
access-list 23 permit 192.168.1.0 0.0.0.255
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
logging synchronous
no modem enable
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
line vty 0 4
login
!
scheduler max-task-time 5000
end

CONFIG ON AP OF 881W

version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname ap
!
!
no aaa new-model
!
!
!
dot11 ssid 881wireless
!
dot11 ssid 881wireless vlan 1
authentication open
authentication key-management wpa
guest-mode
wpa-psk ascii 0 givemewifi
!
dot11 network-map
!
!
!
bridge irb
!
!
interface Dot11Radio0
no ip address
no ip route-cache
!
encryption vlan 1 mode ciphers tkip
!
ssid 881wireless
!
station-role root
!
interface Dot11Radio0.1
encapsulation dot1Q 1 native
no ip route-cache
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
bridge-group 1 spanning-disabled
!
interface GigabitEthernet0
description the embedded AP GigabitEthernet 0 is an internal interface connecting AP with the host router
no ip address
no ip route-cache
!
interface GigabitEthernet0.1
encapsulation dot1Q 1 native
no ip route-cache
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
!
interface BVI1
ip address 192.168.1.2 255.255.255.0
no ip route-cache
!
ip default-gateway 192.168.1.1
ip http server
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779...onfig/help/eag
bridge 1 route ip

LinuxRacr · May 2012

Did you ever get this working?

JeanM · May 2012

Nice thread guys! Quick question. Can I use 1 881W as the "wireless bridge" to connect my existing WPA2 network and act as internet gateway or router over wireless for cisco lab?

This way I don't have to run copper from one room to another and still have internet connection for the lab itself is what I am thinking..

Mstavridis · May 2012

Yeah I am pretty sure you can don't have a 881w to test it out but hell i know you can just route a connection from a wired computer that has a wireless connection to any router. If your wondering how just ask I will guide you through it.

ciscoman2012 · May 2012

LinuxRacr wrote: »

Did you ever get this working?

Yes I did thanks.

JeanM, I'm really not sure. I'm sure there is a way but I'm not sure what steps on the CLI to take.

881W Not Broadcasting SSID

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