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bridge loses connection after a few minutes

Hi at all,

my name is Daniel and i have a problem with two AIR-SAP1532E-E-K9 with the software version 15.2(4)JB3b.

The situation: Our customer want to connect two buildings with a wireless bridge, so he bought two 1532 with two AIR-ANT5114P2M-N= antennas.

Over the wireless connection should go traffic from different VLANs.

The root bridge is configured as follows:

dot11 ssid [SSID]
   vlan 212
   authentication open
   authentication key-management wpa
   infrastructure-ssid
   wpa-psk ascii 7 [KEY]
!

interface Dot11Radio1
 no ip address
 no ip route-cache
 !
 encryption vlan 212 mode ciphers aes-ccm
 !
 ssid [SSID]
 !
 antenna gain 14
 peakdetect
 no dfs band block
 power local 15
 packet retries 64 drop-packet
 channel dfs
 station-role root bridge
!

interface Dot11Radio1.204
 encapsulation dot1Q 204
 no ip route-cache
 logging event subif-link-status
 bridge-group 2
 bridge-group 2 spanning-disabled
!
interface Dot11Radio1.212
 encapsulation dot1Q 212 native
 no ip route-cache
 logging event subif-link-status
 bridge-group 1
 bridge-group 1 spanning-disabled
!
interface Dot11Radio1.463
 encapsulation dot1Q 463
 no ip route-cache
 logging event subif-link-status
 bridge-group 3
 bridge-group 3 spanning-disabled
!

The GigabitEthernet is configured like the dot11radio 1 with the Sub interfaces for each VLAN.

The non-root bridge is configured as follows:

dot11 ssid [SSID]
   vlan 212
   authentication open
   authentication key-management wpa
   infrastructure-ssid
   wpa-psk ascii 7 [Key]
!

interface Dot11Radio1
 no ip address
 no ip route-cache
 !
 encryption vlan 212 mode ciphers aes-ccm
 !
 ssid [SSID]
 !
 antenna gain 14
 peakdetect
 power local 11
 packet retries 64 drop-packet
 station-role non-root bridge
!
interface Dot11Radio1.204
 encapsulation dot1Q 204
 no ip route-cache
 logging event subif-link-status
 bridge-group 2
 bridge-group 2 spanning-disabled
!
interface Dot11Radio1.212
 encapsulation dot1Q 212 native
 no ip route-cache
 logging event subif-link-status
 bridge-group 1
 bridge-group 1 spanning-disabled
!

The GigabitEthernet is configured like the dot11radio 1 with one subinterface for each VLAN.

 

At the moment the non-root bridge connects to the root. All is fine and each subinterface comes up. After 3-4 minutes the non-root logs the message that there is no response from the root and shut down the interfaces and after a short moment the non-root connect to the root again.

The root shows with the command sh dot11 associations:

802.11 Client Stations on Dot11Radio1:

SSID [SSID] :

MAC Address    IP address      IPV6 address                           Device        Name            Parent         State     
189c.5d79.f570 0.0.0.0         ::                                     Br-client     -               189c.5d7d.f570 Assoc    
189c.5d7d.f570 10.93.212.225   ::                                     bridge        BR-Archiv-Neu01 self           Assoc

And some logging from the non root:

Sep  1 13:51:02.806: %DOT11-4-CANT_ASSOC: Interface Dot11Radio1, cannot associate: Rcvd response from 189c.5d7d.f2b0 channel 100 43058
Sep  1 13:51:03.806: %DOT11-4-CANT_ASSOC: Interface Dot11Radio1, cannot associate: Associating
Sep  1 13:51:11.806: %DOT11-4-CANT_ASSOC: Interface Dot11Radio1, cannot associate: EAP authenticating
Sep  1 13:52:22.554: %DOT11-4-UPLINK_ESTABLISHED: Interface Dot11Radio1, Associated To AP BR-RH-WSee02 189c.5d7d.f2b0 [None WPAv2 PSK]
Sep  1 13:52:22.558: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.204, changed state to up
Sep  1 13:52:22.558: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.212, changed state to up
Sep  1 13:52:22.558: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.463, changed state to up
Sep  1 13:52:22.558: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.533, changed state to up
Sep  1 13:53:04.459: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.204, changed state to down
Sep  1 13:53:04.459: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.212, changed state to down
Sep  1 13:53:04.459: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.463, changed state to down
Sep  1 13:53:04.459: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.533, changed state to down
Sep  1 13:53:15.139: %DOT11-4-CANT_ASSOC: Interface Dot11Radio1, cannot associate: No Response
Sep  1 13:53:50.151: %DOT11-4-CANT_ASSOC: Interface Dot11Radio1, cannot associate: EAP authenticating
Sep  1 13:54:07.371: %DOT11-4-UPLINK_ESTABLISHED: Interface Dot11Radio1, Associated To AP BR-RH-WSee02 189c.5d7d.f2b0 [None WPAv2 PSK]
Sep  1 13:54:07.375: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.204, changed state to up
Sep  1 13:54:07.375: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.212, changed state to up
Sep  1 13:54:07.375: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.463, changed state to up
Sep  1 13:54:07.375: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Dot11Radio0.533, changed state to up

So it looks like the root bridge shuts the interfaces and then activate them after a short time.

What i want to do next is to upgrade the software version and to set the channel of the 5 GHz interface manually.

I hope somebady have another idea and would share it with us.

regards

Daniel

  • Other Wireless - Mobility Subjects
1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Hi Daniel,Thanks for your

Hi Daniel,

Thanks for your brief explanation, the configuration looks good and from the logs I see that the radios are going up and down.

Kindly, make sure that the antennas are installed and mounted in the right direction.

Change the channels manually, you are using Radio 1 for bridging make sure there is enough coverage to cover Radio 1.

You can also test with Radio 0 for bridging and i also understand that there are some of the known issues with the version you are running for bridging and WGB connectivity.

Once after doing all these tests it's good for you to upgrade the APs to 15.2(4)JB5 and above.

Regards

Salma 

 

1 REPLY
Cisco Employee

Hi Daniel,Thanks for your

Hi Daniel,

Thanks for your brief explanation, the configuration looks good and from the logs I see that the radios are going up and down.

Kindly, make sure that the antennas are installed and mounted in the right direction.

Change the channels manually, you are using Radio 1 for bridging make sure there is enough coverage to cover Radio 1.

You can also test with Radio 0 for bridging and i also understand that there are some of the known issues with the version you are running for bridging and WGB connectivity.

Once after doing all these tests it's good for you to upgrade the APs to 15.2(4)JB5 and above.

Regards

Salma 

 

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