[CentOS] Wireless cannot ping gateway after 6.3 CR updates

On 03/06/2013 07:19 PM, b.j. mcclure wrote:
> On Wed, 2013-03-06 at 13:06 -0500, b.j. mcclure wrote:
>
>> I'm having a wireless connection issue with an HP laptop and a Zotac
>> media server after the 6.4 package updates from CR repository.  Nothing
>> changed with wireless config as far as I can tell.  Both have been
>> working fine with previous releases of 6.x.
>>
>> Oddly, if a cat 5 cable is connected for a few seconds and then
>> disconnected the wireless works fine and survives a 'service network
>> restart' but does not survive a reboot.  A laptop running Ubuntu 12.04
>> continues to connect normally.
>>
>> The boxes in question appear to connect to the router/accesspoint, are
>> assigned correct static IPs, but cannot ping any box on the intranet
>> including the router.  No other boxes on the intranet can ping the hp or
>> zotac, Once a network cable is inserted and removed all is well with
>> that box. The zotac box uses the ath9k wireless driver, the HP uses b43.
>> Same result using DHCP instead of static IP.
>>
>> Output of iwconfig appears normal on both errant boxes and does not
>> change from non-working to working state.
>>
>> Google has not been much help.  FWIW, here is output of iwconfig and
>> ifconfig.
>>
>> ~]$ ifconfig
>> eth0      Link encap:Ethernet  HWaddr 00:01:2E:BC:74:14
>>            inet6 addr: fe80::201:2eff:febc:7414/64 Scope:Link
>>            UP BROADCAST MULTICAST  MTU:1500  Metric:1
>>            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>>            TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
>>            collisions:0 txqueuelen:1000
>>            RX bytes:0 (0.0 b)  TX bytes:1249 (1.2 KiB)
>>
>> lo        Link encap:Local Loopback
>>            inet addr:127.0.0.1  Mask:255.0.0.0
>>            inet6 addr: ::1/128 Scope:Host
>>            UP LOOPBACK RUNNING  MTU:16436  Metric:1
>>            RX packets:89 errors:0 dropped:0 overruns:0 frame:0
>>            TX packets:89 errors:0 dropped:0 overruns:0 carrier:0
>>            collisions:0 txqueuelen:0
>>            RX bytes:8807 (8.6 KiB)  TX bytes:8807 (8.6 KiB)
>>
>> wlan0     Link encap:Ethernet  HWaddr 74:F0:6D:8C:FE:CF
>>            inet addr:192.168.1.208  Bcast:192.168.1.255
>> Mask:255.255.255.0
>>            inet6 addr: fe80::76f0:6dff:fe8c:fecf/64 Scope:Link
>>            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>>            RX packets:732 errors:0 dropped:0 overruns:0 frame:0
>>            TX packets:79 errors:0 dropped:0 overruns:0 carrier:0
>>            collisions:0 txqueuelen:1000
>>            RX bytes:107489 (104.9 KiB)  TX bytes:9217 (9.0 KiB)
>>
>> [LSF at nra ~]$ iwconfig
>> lo        no wireless extensions.
>>
>> eth0      no wireless extensions.
>>
>> wlan0     IEEE 802.11bgn  ESSID:"toadnet"
>>            Mode:Managed  Frequency:2.437 GHz  Access Point:
>> 00:24:93:38:89:80
>>            Bit Rate=54 Mb/s   Tx-Power=15 dBm
>>            Retry  long limit:7   RTS thr:off   Fragment thr:off
>>            Power Management:on
>>            Link Quality=70/70  Signal level=-28 dBm
>>            Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
>>            Tx excessive retries:0  Invalid misc:29   Missed beacon:0
>>
>> Any thoughts appreciated.
>>
>> B.J.
>>
>> CentOS release 6.3 (Final)
>
> Replying to my own post, I forgot to mention I have tried several USB
> wireless adapters on both boxes with same results as onboard adapter,
> booted previous 2.6.32-279 kernel instead of 2.6.32-358 and disabled
> Network Manager with no change in behavior.
>
> B.J.
>
>
>
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>
Try service NetworkManager restart, and see how that goes. Or try 
"disconnect" for wireless and connect again.
Also, do you have wpa security? Maybe downgrade wpasupplicant (or what 
ever actual package is in charge)?