Move AP from WLC 4400 to 2500

[p.yang]

I have wlc 4400 running on 6.0.196.0, get new wlc 2500 with 7.0.220.0, on 4400, 12 AP only one will register onto 2500.

Both 4400 and 2500 on the same subnet. how to let AP register on 2500 rather than 4400

AP model:

on 4400 now:  AIR-AP1242AG-A-K9, AIR-LAP1242AG-A-K9, AIR-LAP1142N-A-K9

on 2500 is AIR-LAP1242AG-A-K9

[Scott Fella]

You can put the AP on the same subnet as the 2504 is one way. Then once it joins you can move it to any subnet. Or else you can put both WLC on the same mobility group and have enable fallback enabled.

I'm assuming the country code is correct and the time is set properly.

Here is a doc also that explains other ways for the AP's to join.

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_tech_note09186a00806c9e51.shtml

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[p.yang]

Thanks for reply

DHCP does not provide option 43, 60 problem is there has one of the AP was register on 4400, it register to the 2500,

if i shutdonw 4400, the rest of the APs will not register onto 2500

Both 4400 and 2500 and dhcp server on the same subnet

[Scott Fella]

Out the AP on the same subnet as the WLC and test with that. Look at my other post.

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[p.yang]

AP and the WLC are in the same subnet

[p.yang]

both 4400 and 2500 have the same mobility group, fallback enabled.

country code is the same.

the only different is time before, i set the clock and ntp but it does not help

[Sahil Mengi]

Hi

What discovery mechanism are you following for these Laps?

If laps and wlc are on different vlans, you would need layer three discovery in place returning wlc2504s management address with dhcp offer to these laps.

Dhcp option 43,60:

Here are the VCIs (Vendor class identifiers for above said laps):

LAP1240 series: Cisco AP c1240

LAP1140 Series: Cisco AP c1140

Have your dhcp server/switch serving dhcp configured for option 43 and 60 to return wlc address to these laps.

I am providing sample config for a Cisco IOS switch here,

ip dhcp excluded-address 192.168.6.1 192.168.6.10

!

ip dhcp pool vlan6 network 192.168.6.0 255.255.255.0

default-router 192.168.6.1

option 60 ascii “Cisco AP c1240”

option 43 hex f104.c0a8.0605

(In this example, DHCP Option 60 is correctly using the VCI string for the 1240 series AP. The Option 43 line is the TLV. As you can see, the Type is F1, the Length indicates 1 WLC IP address (1 × 4 = 04), and Value is the WLC management IP converted to hex,c0a80605. The WLC IP is 192.168.6.5.)

If you wnat to migrate all laps to 2500 series include only one address in option 43 TLV.

it should than look like "f104.xxxx.xxxx"

Otherwise, for two it would be "f108.xxxx.xxxx"

I hope that helps..

[Sahil Mengi]

I think we would like to take a look at switchport configs for both wlc's as well as console logs from atleast one lap that is failing.

If possible share "sh interface summary" from both WLCs.

Regards

Sahil

[p.yang]

on 4400

(Cisco Controller) >show interface summary

Interface Name                   Port Vlan Id  IP Address      Type    Ap Mgr Guest
-------------------------------- ---- -------- --------------- ------- ------ -----
ap-manager                       1    untagged 10.10.1.23      Static  Yes    No  
management                     1    untagged 10.10.1.22      Static  No     No  
service-port                      N/A  N/A         10.1.1.10       Static  No     No  
virtual                               N/A  N/A          1.1.1.1         Static  No     No  

on 2500

(Cisco Controller) >show interface summary

Interface Name                   Port Vlan Id  IP Address      Type    Ap Mgr Guest
-------------------------------- ---- -------- --------------- ------- ------ -----
m2                               2    10       10.10.1.92      Dynamic Yes    No  
m3                               3    10       10.10.1.93      Dynamic Yes    No  
m4                               4    10       10.10.1.94      Dynamic Yes    No  
management                 1    10       10.10.1.90      Static  Yes    No  
virtual                          N/A  N/A      1.1.1.1         Static  No     No 

[Scott Fella]

What the heck:).... remove M2-M4 and set the management as the dynamic ap manager... your setup is completely wrong..

Physical Information
Port Number
Backup Port
Active Port
Enable Dynamic AP Management

Thanks,

Scott

Help out other by using the rating system and marking answered questions as "Answered"

[Scott Fella]

Please reference this guide.... it will show you how to setup your 2504

http://www.cisco.com/en/US/products/ps11630/products_tech_note09186a0080b8450c.shtml

Thanks,

Scott

Help out other by using the rating system and marking answered questions as "Answered"

[p.yang]

if you read the link that you provided this is one of the case: compare that with mine, what is the point said I am wrong?

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

>

show interface summary

Interface Name        Port Vlan Id  IP Address     Type    Ap Mgr Guest

--------------------- ---- -------- -------------- ------- ------ -----

apmgr2                2    10       10.10.10.12    Dynamic Yes    No

apmgr3                3    10       10.10.10.13    Dynamic Yes    No

apmgr4                4    10       10.10.10.14    Dynamic Yes    No

management        1    10       10.10.10.10    Static  Yes    No

virtual               N/A  N/A      1.1.1.1        Static  No     No

[Scott Fella]

This is what you should be using. They do show you other ways, but its not best practice and doesn't always work.

Scenario 1

Management interface with embedded AP-Manager is configured on Port 1. Two WLANs are configured on the controller. WLAN 1 and WLAN 2 are mapped to the management interface.

A simple topology has the Cisco 2500 Series Wireless Controller connected to a Catalyst 3560 switch. Gigabit Ethernet port 1 on the controller is connected to Gigabit Ethernet port 1/0/1 on the switch.





Switch#sh run int gig 1/0/1
Building configuration...

Current configuration : 123 bytes
!
interface GigabitEthernet1/0/1
switchport trunk encapsulation dot1q
switchport mode trunk
spanning-tree portfast
end

Switch#

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[Sahil Mengi]

You are migrating from a 4400 series to a 2500 series platform, which has AP-Manager capabilities tied to the management interface itself.

i.e dynamic ap management can be performed by the ap management interface itself.

From the outputs you have shared i think your managment interface is untagged on 4400 and tagged on 2500, why?

What mask are you using for this 10.10.x.x range, if its a class C, and your upstream switch-port for both wlc's looks like what Scott has provided in previous post, i.e a default open trunk, your vlan identifier should be 10 on management.

I- If the upstream switch-port has native vlan command for 10, you can have vlan identifier marked as 0.

Make sure you have the untagged expectation of switch-port and the traffic sent by wlc meet the requirement.

Remove everything as fas as int M2-4 are concerned, remove uplinks from port 2-4 on wlc 2504 and see if that helps.

Regards

Sahil

[p.yang]

Thank for the help.

But I do not think it is trunking/Tag releated.

When I shut down 4400 I can see only one LAP registered, if I reboot 2500, in the beginning, I can see about 5 AP with the status "downloading" after that, they disappear and only one left and registered with 2500. and the one registered may not be the same as previous one

Peter