AP 2700 - 2 MAC addresses - problem with joining to the WLC

[Gunter]

Hi,

I had a problem with joining my new AP 2700 to the controller. I've found workaround but I would like to ask you if you know if this behavior is a some kind of bug or maybe feature

I have DHCP server which assigns IP address base on the binding MAC address with the IP address. Without binding, IP won't be assigned so I added MAC address from the AP sticker (MAC and SN number is on the sticker at the back of each AP) to the DHCP, connected AP to the switch port which was configured exactly the same way like other ports on this switch where older AP are working fine and.... nothing. IP address was not assigned. There was no DHCP request in the DHCP server logs.

During the investigation I've found that AP present 2 MAC addresses on the switch interface:

switch#sh mac address-table interface fa1/1
          Mac Address Table
-------------------------------------------

Vlan    Mac Address       Type        Ports
----    -----------       --------    -----
  11    58f3.54c1.2cb3    DYNAMIC     Fa1/1
  11    58f3.54c1.2cb4    DYNAMIC     Fa1/1

The first one (58f3.54c1.2cb3) is a "sticker" MAC address but the second one (58f3.54c1.2cb4) is something new. Looking in to the DHCP logs I've found log that this second MAC address (58f3.54c1.2cb4) tried to get IP address but it was not possible because this MAC was not binding with any IP address so DHCP server refuse. I added this second MAC (58f3.54c1.2cb4) to the DHCP server, AP get IP address, join to the WLC, download software, reboot and ... this MAC address disappear.

switch#sh mac address-table interface fa1/1
          Mac Address Table
-------------------------------------------

Vlan    Mac Address       Type        Ports
----    -----------       --------    -----
  11    58f3.54c1.2cb3    DYNAMIC     Fa1/1

Software I had on the AP before joining to the WLC was:

Version :
Cisco IOS Software, C2700 Software (AP3G2-RCVK9W8-M), Version 15.2(4)JB5, RELEASE SOFTWARE (fc1)

now I have (after downloaded from the WLC)

Version :
Cisco IOS Software, C2700 Software (AP3G2-K9W8-M), Version 15.2(4)JB6, RELEASE SOFTWARE (fc1)

Do anyone know what happen?

[Leo Laohoo]

Post the complete output to the following commands: 

1.  WLC:  sh sysinfo; 

2.  WLC:  sh time; 

3.  AP:  sh version; and

4.  AP:  sh ip interface brief

[Gunter]

(WLC1) >show sysinfo

Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 7.6.130.0
Bootloader Version............................... 1.0.20
Field Recovery Image Version..................... 7.6.95.16
Firmware Version................................. FPGA 1.7, Env 1.8, USB console 2.2
Build Type....................................... DATA + WPS

System Name...................................... WLC1
System Location..................................
System Contact...................................
System ObjectID.................................. 1.3.6.1.4.1.9.1.1069
Redundancy Mode.................................. Disabled
IP Address....................................... 10.10.10.10
Last Reset....................................... Software reset
System Up Time................................... 25 days 2 hrs 53 mins 5 secs
System Timezone Location.........................
System Stats Realtime Interval................... 5
System Stats Normal Interval..................... 180

Configured Country............................... US  - United States
Operating Environment............................ Commercial (0 to 40 C)

Internal Temp Alarm Limits....................... 0 to 65 C
Internal Temperature............................. +44 C
External Temperature............................. +22 C
Fan Status....................................... OK

State of 802.11b Network......................... Enabled
State of 802.11a Network......................... Disabled
Number of WLANs.................................. 6
Number of Active Clients......................... 25

Burned-in MAC Address............................ XX:XX:XX:XX:XX:XX
Power Supply 1................................... Present, OK
Power Supply 2................................... Present, OK
Maximum number of APs supported.................. 25

(WLC1) >show time

Time............................................. Thu Apr  9 13:51:00 2015

Timezone delta................................... 0:0
Timezone location................................

NTP Servers
    NTP Polling Interval.........................     3600

     Index     NTP Key Index                  NTP Server                  NTP Msg Auth Status
    -------  ----------------------------------------------------------------------------------
       1              0                               10.10.10.11       AUTH DISABLED

It's look like AP doesn't allow for console login or commands it just only show activity. After rebooting the WLC I get information:

Cisco IOS Software, C2700 Software (AP3G2-RCVK9W8-M), Version 15.2(4)JB5, RELEASE SOFTWARE (fc1)

[Leo Laohoo]

It's look like AP doesn't allow for console login or commands it just only show activity. 

Why not?  The AP hasn't joined the controller yet so this means the username/password is still the default "Cisco/Cisco".

[Gunter]

I don't have access to the AP directly, engineer whom I'm taking with told me that he can see output from the AP but AP didn't react on the keyboard.

[Adam-Kanarkiewicz · Accepted solution]

Problem with your APs is related to bug CSCup57618

https://tools.cisco.com/bugsearch/bug/CSCup57618

Symptom:
2700 Series AP send AUX MAC address with DHCP request instead of Gigabit interface 0 MAC address when running recovery image

Conditions:
2700 AP running recovery image.

Workaround:
none

Known Affected Releases:

(3)

15.2(4)JB5

7.6(120.0)

7.6(130.0)

[Gunter]

Thanks Adam