Tracing route to pos2-0-nycmnyg-ubr1.nyc.rr.com [24.29.98.77] over a maximum of 30 hops: 1 <1 ms <1 ms <1 ms mudd-edge-1-vlan236-5.net.columbia.edu [128.59.51.1] 2 <1 ms <1 ms <1 ms nyser-gw.net.columbia.edu [128.59.1.4] 3 198 ms 214 ms 207 ms 67.99.58.193 4 209 ms 204 ms 209 ms 216.140.10.29 5 222 ms 212 ms 197 ms pop1-nye-P12-2.atdn.net [66.185.149.201] 6 208 ms 209 ms 215 ms bb1-nye-P0-0.atdn.net [66.185.151.48] 7 222 ms 222 ms 201 ms bb2-new-P5-0.atdn.net [66.185.152.197] 8 214 ms 207 ms 215 ms pop1-new-P1-0.atdn.net [66.185.137.3] 9 212 ms 213 ms 210 ms rr-queens.atdn.net [66.185.137.14] 10 214 ms 210 ms 201 ms pos0-0-nycmnyc-rtr2.nyc.rr.com [24.29.97.18] 11 214 ms 223 ms 217 ms pos2-0-nycmnyf-rtr1.nyc.rr.com [24.29.98.29] 12 221 ms 219 ms 221 ms pos1-0.nycmnyf-rtr2.nyc.rr.com [24.29.101.206] 13 207 ms 223 ms 223 ms pos3-0-nycmnye-rtr1.nyc.rr.com [24.29.97.14] 14 210 ms 211 ms 214 ms pos2-0.nycmnye-rtr2.nyc.rr.com [24.29.101.210] 15 210 ms 217 ms 222 ms pos3-0-nycmnyg-rtr1.nyc.rr.com [24.29.98.1] 16 3 ms 2 ms 2 ms pos1-0-nycmnyg-ubr2.nyc.rr.com [24.29.98.82] 17 188 ms 182 ms 175 ms pos2-0-nycmnyg-ubr1.nyc.rr.com [24.29.98.77] Trace complete. : bart.cs.columbia.edu ;ping -P 0x06 24.29.98.77 24.29.98.77 is alive : bart.cs.columbia.edu ; : bart.cs.columbia.edu ;tcpdump -n -v -v 14:14:36.531672 128.59.19.191 > 24.29.98.77: icmp: echo request (DF) [tos 0x6,ECT(0)] (ttl 255, id 27138, len 84) 14:14:36.747103 24.29.98.77 > 128.59.19.191: icmp: echo reply (DF) [tos 0x2,ECT(0)] (ttl 247, id 27138, len 84) : bart.cs.columbia.edu ;ping -P 0x06 128.59.1.4 128.59.1.4 is alive : bart.cs.columbia.edu ; : bart.cs.columbia.edu ;tcpdump -n -v -v 14:29:28.797593 128.59.19.191 > 128.59.1.4: icmp: echo request (DF) [tos 0x6,ECT(0)] (ttl 255, id 18111, len 84) 14:29:28.798016 128.59.1.4 > 128.59.19.191: icmp: echo reply (DF) (ttl 254, id 18111, len 84)