Collab Network Test 0317E

This is a forum for discussion about the packet traces obtained in test 0317E.

Packet Traces: Chan 1, Chan 11, Chan 6

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!