topic APs not Join WiSM in Wireless

APs not Join WiSM

cdiaz — Sun, 04 Jul 2021 03:37:52 GMT

Hello, I am Claudio

I have problems with register the APs in the module WiSM, the AP join statistics is null.

The IPs from APs are local DHCP in the module.

The softtware version in the WiSM is 7.0.116. The APs are 1140. The IOS version on the Cat6500 is 12.2.33SXI4a.

Some of you had a similar problem.

Thanks, best regards

APs not Join WiSM

Surendra BG — Fri, 26 Aug 2011 15:04:50 GMT

are the APs getting the IP address from the same subnet as that of the management int of the WLC is it??

Regards

Surendra

APs not Join WiSM

cdiaz — Fri, 26 Aug 2011 15:18:58 GMT

Hi,

The APs is in another VLAN, the APs have ip from DHCP in the WiSM.

In the vlan of APS the command "ip helper address" points to the direction of the interface management.

Thanks

Claudio

APs not Join WiSM

Surendra BG — Fri, 26 Aug 2011 15:42:53 GMT

This does not work.. The APs wil get an IP only if the AP is in the same subnet as that of management interface.. Even the IP helper address will not help..

Regards

Surendra

APs not Join WiSM

cdiaz — Fri, 26 Aug 2011 15:57:38 GMT

Are you sure?.
I have the same topology in others sites, but with WLC 5508s, and this works.

In this case the APs have IP was given by the WiSM.

APs not Join WiSM

Surendra BG — Fri, 26 Aug 2011 15:59:04 GMT

Yes this doesnot work...

Regards

Surendra

APs not Join WiSM

cdiaz — Fri, 26 Aug 2011 16:02:22 GMT

this does not work in the WiSM only?

APs not Join WiSM

Surendra BG — Fri, 26 Aug 2011 16:03:32 GMT

afaik.. this will not work at all..

APs not Join WiSM

George Stefanick — Fri, 26 Aug 2011 16:07:15 GMT

That would work if you were doing IP FOWRADING on the router. The router will take the AP broadcast and send it to the WLC. Check your router see if you have a IP Forward rule set up on your other deployment.

APs not Join WiSM

Surendra BG — Fri, 26 Aug 2011 16:11:50 GMT

WOW!! i dint know this.. 5+ , worked on a case for hours and it just dint work!! thats y good to be a all round network engineer!!

Regards

Surendra

APs not Join WiSM

George Stefanick — Fri, 26 Aug 2011 16:19:55 GMT

WOW, back at ya!

I was able to finally give back to you for once!

Yup, you add a IP helper of the WLC managment address and you do a IP FORWARD on the router with UDP 5246 and the router will send the request to the WLC (and the other ip helpers as well).

Works great when you dont control DHCP (option 43) or DNS servers.

Works great ... I just used it on a big customer a few weeks ago. After I set it up and get the APs to join I take it back off ...

APs not Join WiSM

cdiaz — Fri, 26 Aug 2011 16:41:30 GMT

I'm confused!

I believe in something we are not getting it.

this is the topology....

and this is the DHCP leases...

(WiSM-slot2-1) >(WiSM-slot2-1) >show dhcp leases

MAC IP Lease Time Remaining

e8:b7:48:d6:e6:9d 172.23.24.56 23 hours 59 minutes 24 seconds

e8:b7:48:f5:35:46 172.23.24.57 23 hours 59 minutes 22 seconds

e8:b7:48:2c:64:1c 172.23.24.58 23 hours 59 minutes 17 seconds

00:07:7d:2d:69:e5 172.23.24.59 23 hours 59 minutes 13 seconds

e8:b7:48:f5:1f:b4 172.23.24.60 23 hours 59 minutes 23 seconds

00:07:7d:13:06:eb 172.23.24.61 23 hours 59 minutes 29 seconds

e8:b7:48:f5:35:48 172.23.24.63 23 hours 59 minutes 42 seconds

(WiSM-slot2-1) >

APs not Join WiSM

George Stefanick — Fri, 26 Aug 2011 16:45:50 GMT

We are talking about access points not joining the WLC, correct ?

1) Do you have DHCP option 43 set up ?

2) Do you have DNS set up to resolve CISCO-CAPWAP CONTROLLER

3) You dont have it in the same broadcast domain. So the anwser is NO...

So do you have 1 or 2 set up ?

APs not Join WiSM

cdiaz — Fri, 26 Aug 2011 16:54:43 GMT

As mentioned above, the APs if they get ip from WiSM module, but not join...

APs not Join WiSM

George Stefanick — Fri, 26 Aug 2011 16:57:31 GMT

Understood. Next step...

Do you have 1 or 2 set up from my previuos post ?

Get an IP is a totally different process from the AP joining the WLC.

APs not Join WiSM

cdiaz — Fri, 26 Aug 2011 17:52:45 GMT

4) None of te above....

I have internal DHCP in the WiSM....

(WiSM-slot2-1) >show dhcp summary

Scope Name Enabled Address Range
APS_AVARAS Yes 172.23.24.50 -> 172.23.24.200

(WiSM-slot2-1) >show dhcp leases

       MAC                IP         Lease Time Remaining
e8:b7:48:d6:e6:9d    172.23.24.56    23 hours 59 minutes 29 seconds
e8:b7:48:f5:35:46    172.23.24.57    23 hours 59 minutes 28 seconds
e8:b7:48:2c:64:1c    172.23.24.58    23 hours 59 minutes 23 seconds
00:07:7d:2d:69:e5    172.23.24.59    23 hours 59 minutes 19 seconds
e8:b7:48:f5:1f:b4    172.23.24.60    23 hours 59 minutes 29 seconds
00:07:7d:13:06:eb    172.23.24.61    23 hours 59 minutes 35 seconds
e8:b7:48:f5:35:48    172.23.24.63    23 hours 59 minutes 48 seconds

(WiSM-slot2-1) >show dhcp detailed APS_AVARAS

Scope: APS_AVARAS

Enabled.......................................... Yes
Lease Time....................................... 86400 (1 day )
Pool Start....................................... 172.23.24.50
Pool End......................................... 172.23.24.200
Network.......................................... 172.23.24.0
Netmask.......................................... 255.255.255.0
Default Routers.................................. 172.23.24.1 0.0.0.0 0.0.0.0
DNS Domain.......................................
DNS.............................................. 0.0.0.0 0.0.0.0 0.0.0.0
Netbios Name Servers............................. 0.0.0.0 0.0.0.0 0.0.0.0

(WiSM-slot2-1) >

APs not Join WiSM

George Stefanick — Fri, 26 Aug 2011 17:58:52 GMT

Ok all good stuff.

Correct your AP is getting an IP address. However, you need to set up DHCP option 43, DNS, IP FORWARD, or put the AP on the same broadcast domain as the WLC. Or manual prime. These "methods" are how the access points finds and joins the WLC.

Here is an exmaple of option 43

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00808714fe.shtml

So you need to understand what each one does and what makes the most sense in your enviroment to use.

Again, just becuase the AP as an IP address. Does not mean it joined the WLC.

Does this help or are you still confused ?

APs not Join WiSM

cdiaz — Fri, 26 Aug 2011 19:01:03 GMT

The problem do not is the AP IP address.

When the DHCP is the same WLC or module, the option 43 is configured by default.

Also set the option 43 in the router, but the result was the same.

Even config the AP by console port. (lwap ap ip address.....lwap controller ip address, etc.)

Thanks.

APs not Join WiSM

George Stefanick — Fri, 26 Aug 2011 19:06:57 GMT

Option 43 is not set by default. If you are using option 43, it sounds like its not working propertly. Post your option 43 config of your router so we can take a peek.

You can also console into a AP. You can see what the ap is telling us ...

APs not Join WiSM

cdiaz — Fri, 26 Aug 2011 19:55:03 GMT

I don't cant see the AP logs.

But now the WiSM shown this logs...

*osapi_ping_rx: Jul 20 08:04:20.344: %OSAPI-3-TASK_SET_TICKLE: osapi_task.c:3886 Task osapi_ping_rx requesting 1 second timer. Minimum is 20.Setting to 20