[Rack] abnormality w noisebridge access point

[Wladyslaw Zbikowski]

Hi, just following up on some previous reports about flakiness with
the "noisebridge" ap. The symptoms I've seen are: access point stays
associated with my interface, but I cannot ping the gateway.
Reconnecting to the access point with Linux NetworkManager fixes this.

It happened once today. Last week Saturday it was happening a lot. I
plugged in the wired network (hub that Mischief put in next to the
public terminal) and I didn't have any more connectivity problems. At
some point I can try to look at the server logs, but I'm just passing
this info on in case anyone else is looking at it.

My HWaddr: 48:5b:39:79:20:09
noisebridge Access Point: 00:1F:41:16:3E:08
Failure times:  Saturday May 26, 5:14pm and Thursday May 31 4:05pm

ifconfig wlan0:

wlan0     Link encap:Ethernet  HWaddr 74:f0:6d:0e:8c:42
          inet addr:172.30.3.75  Bcast:172.30.3.255  Mask:255.255.252.0
          inet6 addr: fe80::76f0:6dff:fe0e:8c42/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:516040 errors:0 dropped:0 overruns:0 frame:0
          TX packets:225471 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:350984014 (350.9 MB)  TX bytes:40534020 (40.5 MB)

iwconfig wlan0:

wlan0     IEEE 802.11bgn  ESSID:"noisebridge"
          Mode:Managed  Frequency:2.422 GHz  Access Point: 00:1F:41:16:3E:08
          Bit Rate=39 Mb/s   Tx-Power=9 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=59/70  Signal level=-51 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:207  Invalid misc:72   Missed beacon:0