Collab Network Test 0317E: Difference between revisions
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(New page: This is a forum for discussion about the packet traces obtained in test 0317E. '''Packet Traces:''' [http://xs-dev.laptop.org/mesh/test0317/t0317_E_1.dump Chan 1], [http://xs-dev.laptop.o...) |
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This is a forum for discussion about the packet traces obtained in test 0317E. |
This is a forum for discussion about the packet traces obtained in [[Collaboration_Network_Testbed#Test_0317E|test 0317E]]. |
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'''Packet Traces:''' [http://xs-dev.laptop.org/mesh/test0317/t0317_E_1.dump Chan 1], [http://xs-dev.laptop.org/mesh/test0317/t0317_E_11.dump Chan 11], [http://xs-dev.laptop.org/mesh/test0317/t0317_E_6.dump Chan 6] |
'''Packet Traces:''' [http://xs-dev.laptop.org/mesh/test0317/t0317_E_1.dump Chan 1], [http://xs-dev.laptop.org/mesh/test0317/t0317_E_11.dump Chan 11], [http://xs-dev.laptop.org/mesh/test0317/t0317_E_6.dump Chan 6] |
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Revision as of 05:29, 19 March 2008
This is a forum for discussion about the packet traces obtained in test 0317E.
Packet Traces: Chan 1, Chan 11, Chan 6
Channel 1
Unused Channels
The unused channels (6 and 11) don't have a school server mesh portal point in this test, so they provide a picture of a laptop searching unsuccessfully for a school server.
Taking channel 6, and applying a filter:
wlan.sa == 00:17:c4:11:81:5a
The following behavior is seen on this laptop:
- We see Beacons sent out at irregular intervals (around 2 - 5 sec)
- At time 66.85, we see a request for IPv6 RADV (actually two, sent with two different BSS IDs), sent at 2 Mb/s. These continue to appear at roughly every 0.25 sec.
- At time 67.47, we see the RREQ go out for the first DHCP request. It is sent at four different rates.
- At 68.615, a RREQ message is relayed for laptop 00:17:c4:0d:37:f5, again at 69.68, 72.69, ...
- At 68.71 an RREQ for the DHCP server anycast MAC is resent
- At 71.72, an RREQ for the DHCP server is resent
- At 72.25, an RREQ is relayed for laptop 00:17:c4:0d:00:01, again at 73.27, ...
- At 72.54, an RREQ is relayed for laptop 00:17:c4:11:01:f0, again at 74.54, ...
- At 75.72, an RREQ for the DHCP server is resent
- Numerous RREQs for other laptops are relayed
- At 82.72, an RREQ for the DHCP server is resent
- At 134.61, we see an omen of future problems, as an ARP request from the school server (transmitted on channel 1!) is relayed.
- Again at 135.99, we see another channel 1 relay, an RREQ from the school server.
- At 158 sec, we leave this channel for the next one.
- Overall, roughly 90 seconds were spent on this channel!