Odd network issue

[gun_smoke@shellium.org]

I'm have some issues while connected to the network on campus only. From
the moment I get connected to the wifi, bwm-ng is reporting I'm receiving
nearly 50KB/s of traffic. I don't have a browsers open etc. Looking at
tcpdump, I see a lot of this. 

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), capture size 96 bytes

16:14:19.205411 IP6 fe80::cddc:9baa:c287:41bc > ff02::16: HBH ICMP6,
multicast listener report v2, 1 group record(s), length 28
16:14:19.205416 00:22:41:98:8f:21 (oui Unknown) > 01:40:96:ff:ff:00 (oui
Unknown), ethertype Unknown (0x872d), length 60: 
        0x0000:  0022 0202 0140 96ff ff00 0022 4198 8f21  ."...@....."A..!
        0x0010:  0022 4198 8f21 000a b8cb 8b10 0000 0000  ."A..!..........
        0x0020:  0000 0000 0000 0000 0000 63ae 7db8       ..........c.}.
16:14:19.205536 arp who-has r30-133-73-207.wccnet.org tell
r251-130-73-207.wccnet.org
16:14:19.205621 IP6 fe80::cddc:9baa:c287:41bc.59001 > ff02::1:3.hostmon:
UDP, length 32
16:14:19.205627 IP r74-132-73-207.wccnet.org.62342 > 224.0.0.252.hostmon:
UDP, length 32
16:14:19.246879 IP r214-130-73-207.wccnet.org.mdns > 224.0.0.251.mdns: 0
PTR (QM)? 168.139.73.207.in-addr.arpa. (45)
16:14:19.413743 IP6 fe80::444:c0df:351c:69f.54177 > ff02::1:3.hostmon:
UDP, length 26
16:14:19.413858 IP r240-130-73-207.wccnet.org.54985 > 224.0.0.252.hostmon:
UDP, length 26
16:14:19.413945 IP6 fe80::cddc:9baa:c287:41bc > ff02::16: HBH ICMP6,
multicast listener report v2, 4 group record(s), length 88
16:14:19.414036 IP6 fe80::504f:2731:3f62:1637.546 > ff02::1:2.547: dhcp6
solicit
16:14:19.414042 arp who-has 207.73.139.96 tell 207.73.139.1

C1252 packets captured
8149 packets received by filter
6624 packets dropped by kernel

With all this activity I can barely ssh to a machine, let alone surf the
web. I look around at classmates who are running something other than *nix
and they are all surfing away just fine. 

I don't know a whole lot about networking, which leaves me with not much
of an idea on where to start on all of this. Any help would be really
appreaciated.