#9680 LOW Opportu: XO-1.5 os40 duplicate packets seen if other host is running tcpdump

Zarro Boogs per Child bugtracker at laptop.org
Sun Nov 15 19:33:34 EST 2009


#9680: XO-1.5 os40 duplicate packets seen if other host is running tcpdump
----------------------+-----------------------------------------------------
 Reporter:  Quozl     |                 Owner:  mbletsas                         
     Type:  defect    |                Status:  new                              
 Priority:  low       |             Milestone:  Opportunity                      
Component:  wireless  |               Version:  Development build as of this date
 Keywords:            |           Next_action:  diagnose                         
 Verified:  0         |   Deployment_affected:                                   
Blockedby:            |              Blocking:                                   
----------------------+-----------------------------------------------------
 Many duplicate packets are seen on a host if the other host in a private
 network is running tcpdump in the default promiscuous mode.

  * using the ''Frame'' key right-click on the wireless icon and ''Create
 new wireless network'',
  * wait for the icon for the new network to appear on the other XO-1.5
 Neighbourhood View, and click on it,
  * determine the IP addresses using ''ifconfig'' or the ''Frame'' key,
  * on one XO start Terminal and run tcpdump:
  {{{
 tcpdump -i eth0
 }}}
  * on the other XO ping the IP address of the first XO, duplicate packets
 will be seen on the ping output, and the tcpdump will show duplicates
 received; nine for each packet,
  * stop tcpdump, the duplicate ping packets will cease,
  * start tcpdump, the duplicate ping packets will resume,
  * stop tcpdump and start with -p flag, the duplicate ping packets will
 cease.

 Since use of tcpdump or promiscuous mode is not expected, leaving this one
 as an Opportunity.

-- 
Ticket URL: <http://dev.laptop.org/ticket/9680>
One Laptop Per Child <http://laptop.org/>
OLPC bug tracking system


More information about the Bugs mailing list