WIFI - Page 2

smarshalek · ‎07-07-2011

I have a Cisco 871 and have been using it to connect my laptop via wireless for about a year.

Now my laptop comes back with "Cannot connect to DHCP server" (my ISP serves up DHCP).

I have updated the laptop wifi driver, Windows is current, etc The wifi card passes all diagnostics.

I can see the laptop connecting to the router.

I have rebooted the router, cable modem, etc.

Is there something on the router that needs to be reconfigured or any other thoughts?

sudharsan_n · ‎07-10-2011

Hi Stan,

I am sorry that didn't fix your problem.

Enabling the interface is a solution to a part of the problem. However in the same wireless configuration. I am also seeing another issue.

======================

!

interface Dot11Radio0

description WLAN Port

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

station-role root

!

===========================

If you see the IP address part, there is "no IP address".

Either it should take it from the DHCP scope from ISP or locally providing it.

That part of configiration is missing.

The SSID, Authentication Type, providing DHCP server Pool etc also needs to be configured.

I am not conversant with the Wireless part configuration. I would recomend to visit the link, that may help you.

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a0080608364.shtml

Cheers,

Sudharsan

Surendra BG · ‎07-10-2011

Hi,

Hope you are doing great!!

From the config.. i do not see the SSID configurations at all!! and the BVI 1 n all those!! whats the SSID name that u wanna connect to??

here is the sample config that may help you!! please do this with the console access.. if not we will lose the connectivity to the device and may need to reboot the device to get the access again!!

en

conf t

bridge irb

bridge 1 protocol ieee

bridge 1 route ip

interface Vlan1

no ip address 192.168.1.1 255.255.255.0

no ip nat inside

no ip virtual-reassembly

no ip tcp adjust-mss 1452

end

en

conf t

int bvi 1

description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$

ip address 192.168.1.1 255.255.255.0

ip nat inside

ip virtual-reassembly

ip tcp adjust-mss 1452

end

interface Vlan1

bridge-group 1

end

en

config t

dot11 ssid test

authentication open

vlan 1

guest-mode

end

en

conf t

int dot11 0

ssid test

no shut

end

en

conf t

int dot11 0.1

encapsulation dot1Q 1 native

bridge-group 1

end

wr

issue the command command "sh ip int br" and see if all the Interfaces are up and running and now connect to the SSID test and see if it works fine!!

Lemme know if this helps and please dont forget to rate the usefull posts!!

Regards

Surendra

Regards
Surendra BG

smarshalek · ‎07-11-2011

Hi Surendra,

Good Call! Despite the no shutdown - this is what I see:

Dot11Radio0 unassigned YES NVRAM reset down

Surendra BG · ‎07-11-2011

Hi Stan,

Did we configure the device the way i posted the snippet?? are we still seeing the Radio in reset down??

Regards

Surendra

Regards
Surendra BG

smarshalek · ‎07-11-2011

Hi

Yes - as I state, it was configured with the no shutdown and I confirm by issuing a sh run and

Yes - I copied and pasted the reset/down from the command you sent me....

Thanks

Surendra BG · ‎07-11-2011

Hi Stan,

Please paste the running config again here..

Regards

Surendra

Regards
Surendra BG

smarshalek · ‎07-11-2011

Hi,

It is identical to the one above withOUT the "shutdown" command under Dot11Radio0.

I went thru it line by line.

Thanks.

Surendra BG · ‎07-11-2011

hmmm.. strange!! wat does the logs say??

Regards

Surendra

Regards
Surendra BG

smarshalek · ‎07-11-2011

I agree!! very strange. It is driving me crazy. What would cause the Dot11Radio0 interface to just drop????

0 flushes, 0 overruns, xml disabled, filtering disabled)

No Active Message Discriminator.

No Inactive Message Discriminator.

    Console logging: level debugging, 35 messages logged, xml disabled,
                     filtering disabled
    Monitor logging: level debugging, 0 messages logged, xml disabled,
                     filtering disabled
    Buffer logging: level informational, 34 messages logged, xml disabled,
                     filtering disabled
    Logging Exception size (4096 bytes)
    Count and timestamp logging messages: disabled
    Persistent logging: disabled

No active filter modules.

ESM: 0 messages dropped

Trap logging: level informational, 39 message lines logged

Log Buffer (16384 bytes):

*Mar 1 00:00:10.859: %VPN_HW-6-INFO_LOC: Crypto engine: onboard 0 State change
d to: Initialized
*Mar 1 00:00:10.863: %VPN_HW-6-INFO_LOC: Crypto engine: onboard 0 State change
d to: Enabled
*Mar 1 00:00:13.615: %LINK-3-UPDOWN: Interface FastEthernet0, changed state to
up
*Mar 1 00:00:13.619: %LINK-3-UPDOWN: Interface FastEthernet4, changed state to
up
*Mar 1 00:00:14.615: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern
et0, changed state to up
*Mar 1 00:00:14.615: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern
et4, changed state to up
*Feb 28 19:00:17 EST: %SYS-6-CLOCKUPDATE: System clock has been updated from 00:
00:17 UTC Fri Mar 1 2002 to 19:00:17 EST Thu Feb 28 2002, configured from consol
e by console.
*Feb 28 19:00:18 EST: %SYS-5-CONFIG_I: Configured from memory by console
*Jul 8 11:09:30 EST: %SYS-5-RESTART: System restarted --
Cisco IOS Software, C870 Software (C870-ADVSECURITYK9-M), Version 12.4(15)T9, RE
LEASE SOFTWARE (fc5)
Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 29-Apr-09 05:52 by prod_rel_team
*Jul 8 11:09:30 EST: %SNMP-5-COLDSTART: SNMP agent on host SJMRouter is undergo
ing a cold start
*Jul 8 11:09:30 EST: %SSH-5-ENABLED: SSH 2.0 has been enabled
*Jul 8 11:09:30 EST: %DOT11-4-NO_SSID: No SSID configured. Dot11Radio0 not star
ted.
*Jul 8 11:09:30 EST: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF
*Jul 8 11:09:30 EST: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF
*Jul 8 11:09:30 EST: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to r
eset
*Jul 8 11:09:30 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0,
changed state to up
*Jul 8 11:09:30 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface NVI0, chan
ged state to down
*Jul 8 11:09:31 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, cha
nged state to up
*Jul 8 11:09:31 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio
0, changed state to down
*Jul 8 11:09:31 EST: %LINK-5-CHANGED: Interface NVI0, changed state to administ
ratively down
*Jul 8 11:09:32 EST: %LINK-3-UPDOWN: Interface FastEthernet3, changed state to
up

*Jul 8 11:09:33 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern
et3, changed state to down
*Jul 8 11:09:33 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern
et2, changed state to up
*Jul 8 11:09:33 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern
et1, changed state to down
*Jul 8 11:09:33 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern
et0, changed state to up
*Jul 8 11:09:38 EST: %DHCP-6-ADDRESS_ASSIGN: Interface FastEthernet4 assigned D
HCP address 69.244.152.35, mask 255.255.248.0, hostname SJMRouter

*Jul 8 13:27:39 EST: %SYS-5-CONFIG_I: Configured from console by console
*Jul 9 01:06:20 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern
et0, changed state to down
*Jul 9 01:06:21 EST: %LINK-3-UPDOWN: Interface FastEthernet0, changed state to
up
*Jul 9 01:06:22 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern
et0, changed state to up
*Jul 9 01:06:41 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern
et0, changed state to down
*Jul 9 01:06:42 EST: %LINK-3-UPDOWN: Interface FastEthernet0, changed state to
up

*Jul 9 01:06:43 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthern
et0, changed state to up
SJMRouter#

Surendra BG · ‎07-11-2011

hmmm..

*Jul 8 11:09:30 EST: %DOT11-4-NO_SSID: No SSID configured. Dot11Radio0 not star

please issue the comand and see if that helps

en

conf t

int dot11 0

ssid test

no shut

end

lemme know if this helps!!

Regards

Surendra

Regards
Surendra BG

smarshalek · ‎07-11-2011

Hi,

Still no go..... I have great signal strength on laptop but 169.x.x.x IP! A couple things:

I assumed you wanted me to put in my valid SSID(SJMWLAN) instead of test? My site monitor on laptop now has 2 SJMWLANS on different channels.

This is what I see on router now - Dot11Radio0 unassigned YES NVRAM up up

*Jul 9 03:10:05 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio

0, changed state to up

!

interface Dot11Radio0

description WLAN Port

no ip address

!

ssid SJMWLAN

!

*Jul 9 03:10:05 EST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio
0, changed state to up

This is from sh run:

!
interface Dot11Radio0
description WLAN Port
no ip address
!
ssid SJMWLAN
!

smarshalek · ‎07-11-2011

Hi there,

I just noticed this in the running config - I have 2 commands now:

dot11 ssid SJMWLAN

ssid SJMWLAN

Do I need to remove 1? Which one and how, please? Thanks.

Surendra BG · ‎07-11-2011

No need to remove any command.. coz..

Dot11 ssid === SSID configuration

ssid ========= mapping the SSID to the radio interface!!

I guess the issue is resolved and please let mw know if u need anymore help!!

Please dont forget to rate the usefull posts!!

Regards

Surendra

Regards
Surendra BG

smarshalek · ‎07-11-2011

Ok, that makes sense.

No, the issue still remains...... I said that in the post above my last one.

Please review that one. I have log info, etc.... I know, it is frustrating!!

Thanks.

Surendra BG · ‎07-11-2011

i can see that the radio interface came up!! now whats the issue??

Regards

Surendra

Regards
Surendra BG