[Trac #1130] Is ping failure due to channel switch?

[Zarro Boogs per Child]

#1130: Is ping failure due to channel switch?
--------------------------------+-------------------------------------------
 Reporter:  swagle at marvell.com  |       Owner:  rchokshi 
     Type:  defect              |      Status:  new      
 Priority:  normal              |   Milestone:  Untriaged
Component:  wireless            |    Keywords:           
--------------------------------+-------------------------------------------
 Kernel Version  -  {{{ Linux localhost.localdomain
 2.6.21-20070312.1.olpc.3eca75102a57502 #1 PREEMPT Mon Mar 12 16:08:37 EDT
 2007 i586 i586 i386 GNU/Linux }}}

 Arp table:
 {{{
 Address                  HWtype  HWaddress           Flags Mask
 Iface
 10.2.51.65               ether   00:17:C4:02:33:41   C
 msh0
 10.0.206.250             ether   00:17:C4:00:CE:FA   C
 msh0
 10.0.205.145             ether   00:17:C4:00:CD:91   C
 msh0
 }}}

 Firmware Driver version
 {{{
 driver: libertas
 version: COMM-USB8388-320.p0-dbg
 firmware-version: 5.220.9.p253
 bus-info:
 }}}

 Mesh Stats:
 {{{
 NIC statistics:
      drop_duplicate_bcast: 498290
      drop_ttl_zero: 4880
      drop_no_fwd_route: 39
      drop_no_buffers: 780
      fwded_unicast_cnt: 4816
      fwded_bcast_cnt: 55789
      drop_blind_table: 0
 }}}
 Mesh Interface:
 {{{
 msh0      Link encap:Ethernet  HWaddr 00:17:C4:01:18:EB
           inet addr:10.1.24.235  Bcast:10.255.255.255  Mask:255.0.0.0
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:2312639 errors:0 dropped:0 overruns:0 frame:1617
           TX packets:306796 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:206979116 (197.3 MiB)  TX bytes:27549364 (26.2 MiB)
 }}}
 Description of problem:

 1.Form a mesh between four nodes and ping three of them from one in an
 overnight test.

 2.Ping from Node 1 --> Node 2 Ping-Pass
   Ping from Node 1 --> Node 3 (Ping failure is seen on node 1 when pinging
 node 3.
   Ping from Node 1 --> Node 4 Ping-Pass

 3.Run a scan on node 3 and the ping resumed on node 1.Checked the channel
 for node 3 and it was still in channel 6,atleast thats what was reported
 by iwlist msh0 channel)

 4.The channel was checked for node 3 and reports channel 6(default mesh
 mode channel)but few beacons can been seen on channel 3(?)

-- 
Ticket URL: <http://dev.laptop.org/ticket/1130>
One Laptop Per Child <http://laptop.org/>