topic CBW240AC rebooting in Wireless

CBW240AC rebooting

s.toro — Sat, 19 Mar 2022 17:41:18 GMT

Hi guys,

We have brand new 20x CBW240AC Wireless Access Point with latest firmware 10.7.1.0.

All the access point are connected to 12x new switches Catalyst 1000 (8 and 24 ports), latest firmware 15.2(7)E5. All RJ45 cables are brand new of CAT6a.

We have many problems of suddently the access point reboot, even if no users are connected on the Wi-Fi. This appears from time to time but very frequently and the access point that reboot is not each time the same.

There is a strange beahavior also, the access point can work for weeks without rebooting and can then reboot 20 times a day for 2-3 consecutive day.

The setup is much simple, here is an example :

1 switch 8-port (C1000-8P-E-2G-L) with 3 access points on ports 1 to 3. The port 9 is the uplink.

#show ver
Cisco IOS Software, C1000 Software (C1000-UNIVERSALK9-M), Version 15.2(7)E5, RELEASE SOFTWARE (fc3)

#sh run

interface GigabitEthernet1/0/1
switchport trunk native vlan 40
switchport mode trunk
!
interface GigabitEthernet1/0/2
switchport trunk native vlan 40
switchport mode trunk
!
interface GigabitEthernet1/0/3
switchport trunk native vlan 40
switchport mode trunk

.....

interface GigabitEthernet1/0/9
switchport mode trunk

#sh power inline

Module Available Used Remaining
(Watts) (Watts) (Watts)
------ --------- -------- ---------
1 67.0 53.4 13.6
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/1 auto on 17.8 CBW240AC-E 4 30.0
Gi1/0/2 auto on 17.8 CBW240AC-E 4 30.0
Gi1/0/3 auto on 17.8 CBW240AC-E 4 30.0
Gi1/0/4 auto off 0.0 n/a n/a 30.0
Gi1/0/5 auto off 0.0 n/a n/a 30.0
Gi1/0/6 auto off 0.0 n/a n/a 30.0
Gi1/0/7 auto off 0.0 n/a n/a 30.0
Gi1/0/8 auto off 0.0 n/a n/a 30.0

#sh cdp neig
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,
D - Remote, C - CVTA, M - Two-port Mac Relay

Device ID Local Intrfce Holdtme Capability Platform Port ID
ap20 Gig 1/0/1 137 R T CBW240AC- Gig 0
ap37 Gig 1/0/3 142 R T CBW240AC- Gig 0
ap43 Gig 1/0/2 168 R T CBW240AC- Gig 0
nsxx Gig 1/0/9 172 S I C1000-24P Gig 1/0/28

and here is an example of our log management server (Graylog). All logs from the switches are directed on Graylog.

2022-03-19 18:25:05.228 +01:00	10.42.4.209
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
2022-03-19 18:24:59.546 +01:00	10.42.4.209
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to down
2022-03-19 18:24:58.541 +01:00	10.42.4.209
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to down
2022-03-19 18:24:49.548 +01:00	10.42.4.209
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to up
2022-03-19 18:24:47.527 +01:00	10.42.4.209
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
2022-03-19 18:24:43.445 +01:00	10.42.4.209
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to down
2022-03-19 18:24:42.441 +01:00	10.42.4.209
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to down

We have also checkd the cable with cable-diagnostics. All seeams to be good.

#sh cable-diagnostics tdr int gi1/0/1
TDR test last run on: March 19 18:48:36

Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi1/0/1 1000M Pair A 37 +/- 10 meters Pair A Normal
Pair B 37 +/- 10 meters Pair B Normal
Pair C 37 +/- 10 meters Pair C Normal
Pair D 37 +/- 10 meters Pair D Normal

Anyone can help us finding the solution ?

Thank you very much and best regards

Stefano

Re: CBW240AC rebooting

Ambuj M — Sun, 20 Mar 2022 04:26:51 GMT

Couldn’t find a bug but seems like one, check with Cisco May be an internal bug.

Re: CBW240AC rebooting

s.toro — Sun, 20 Mar 2022 06:55:05 GMT

@Ambuj M Thank you for checking ! I'll try to contact Cisco the next week for doing that.

Re: CBW240AC rebooting

Mark Elsen — Sun, 20 Mar 2022 08:31:32 GMT

- Check for further logs and or use a syslog server too.

Re: CBW240AC rebooting

s.toro — Mon, 21 Mar 2022 07:30:42 GMT

@Mark Elsen

Hi, we have configured the redirection of syslog to our central log management (Graylog).

here is the config provided on the switch :

logging trap 7
logging x.x.x.x

and on theWi-Fi controller (Promary AP):

Log Syslog Level : 7

Host : x.x.x.x

Below the message from the switch :

2022-03-21 08:23:39.829 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:23:29.898 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:23:19.725 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:23:17.639 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:22:57.398 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:22:56.394 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:22:26.135 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:22:24.078 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:22:03.816 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:22:02.811 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:21:32.418 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:21:30.375 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:21:08.016 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:21:07.010 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:20:29.714 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:20:27.650 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:20:07.172 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:20:06.167 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:19:36.000 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:19:33.936 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:19:04.774 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:19:03.769 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:18:20.179 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:18:18.114 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to up
2022-03-21 08:17:57.714 +01:00	10.42.4.224
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/22, changed state to down
2022-03-21 08:17:53.392 +01:00	10.42.4.224
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/22, changed state to down

And the message from controller :

2022-03-21 08:24:47.459 +01:00	nc01:
nc01: *spamApTask0: Mar 21 08:25:09.869: %WLAN-5-AP_JOIN: capwap_ac_sm.c:3825 ap36 is UP and operational.
2022-03-21 08:18:13.324 +01:00	nc01:
nc01: *spamApTask0: Mar 21 08:18:35.741: %WLAN-3-AP_DISCONNECTED: capwap_ac_sm.c:8531 ap36 is disconnected.

I hope this will help.

Thank you

Best regards

Stefano

Re: CBW240AC rebooting

Mark Elsen — Mon, 21 Mar 2022 07:46:37 GMT

- No clear indicators of what happens, you may want to escalate : https://www.cisco.com/c/en/us/support/web/tsd-cisco-small-business-support-center-contacts.html

Re: CBW240AC rebooting

s.toro — Wed, 23 Mar 2022 14:27:12 GMT

@Mark Elsen

Hi, I've contacted Cisco and opened a ticket with the problem.

I get in touch when i've got news.

Thank you

Stefano