[Trac #951] Unable to ping some 1-hop neighbors in a mesh

[Zarro Boogs per Child]

#951: Unable to ping some 1-hop neighbors in a mesh
----------------------+-----------------------------------------------------
 Reporter:  jcardona  |       Owner:  jcardona
     Type:  defect    |      Status:  new     
 Priority:  blocker   |   Milestone:  BTest-3 
Component:  wireless  |    Keywords:          
----------------------+-----------------------------------------------------
 Sometimes nodes that are within direct link range cannot ping each other.
 This has been observed on OLPC 13-node mesh testbed.

 To reproduce:

 1. Bring up the mesh interface on all the laptops in the mesh:

 {{{
   iwconfig msh0 mode ad- essid <pick_any>
   ifconfig msh0 <pick_any>
 }}}

 2.  Ping other nodes

 {{{
 # for i in `seq 1 14`; do ping -q -c 5 mshy$i; done | grep ' 0% packet
 loss' | wc -l
 # 8      # WRONG, right answer was 14
 }}}

 This could not been reproduced on cozybit's 5-node testbed:

 {{{
 # for i in `seq 5 9`; do ping -q -c 5 192.168.3.7$i; done | grep ' 0%
 packet loss' | wc -l
 # 5      # RIGHT
 }}}

 Firmware version, 5.220.9.p9, md5sum 25...fd

-- 
Ticket URL: <http://dev.laptop.org/ticket/951>
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