routing badness anecdote: berkeley

Neal Cardwell (cardwell@cs.washington.edu)
Mon, 10 Aug 1998 16:00:33 -0700 (PDT)

Our path to Berkeley just grew in latency by a factor of more than two
recently. We used to have a 20ms path straight through sprintlink all the
way. Packets now take a torturous 40-60ms route through MCI, exodus.net,
and ucnet.net (at least today they do). This means our TCP bandwidth to
UCB is now at least twice as bad.....

before (may):

1 vacumatic.cac.washington.edu (128.95.4.100) 0.854 ms 0.782 ms 0.812
ms
2 uwbr2-FE1-1-0.cac.washington.edu (140.142.153.24) 0.821 ms 0.785 ms
0.653 ms
3 seabr2-gw.nwnet.net (204.200.8.6) 1.638 ms 1.472 ms 1.515 ms
4 wes-core2-HSSI6-0-0.nw.verio.net (198.104.194.50) 1.436 ms 1.467 ms
2.17 ms
5 sl-gw5-sea-11-0.sprintlink.net (144.228.97.17) 1.932 ms 2.787 ms
3.479 ms
6 sl-bb11-sea-4-3.sprintlink.net (144.232.6.61) 1.65 ms 2.007 ms
2.497 ms
7 sl-bb22-stk-4-0.sprintlink.net (144.232.8.29) 17.983 ms 18.548 ms
16.938 ms
8 sl-bb21-stk-8-0.sprintlink.net (144.232.4.113) 17.137 ms 18.376 ms
16.742 ms
9 144.232.4.74 (144.232.4.74) 17.63 ms 18.241 ms 17.889 ms
10 sl-ucberkeley-1-1-0-T3.sprintlink.net (144.228.146.50) 25.829 ms
23.21 ms 22.973 ms

11 f5-0.inr-666-eva.berkeley.edu (198.128.16.21) 21.719 ms 23.329 ms
21.296 ms
12 f1-0-0.inr-107-eva.Berkeley.EDU (128.32.2.1) 21.295 ms 20.451 ms
21.106 ms
13 f1-0.inr-180-soda.Berkeley.EDU (128.32.120.180) 21.945 ms 22.013 ms
21.942 ms
14 cayuse.CS.Berkeley.EDU (128.32.33.33) 22.208 ms 20.715 ms
21.819 ms

now (august):

--- cayuse.cs.berkeley.edu ping statistics ---
22 packets transmitted, 21 packets received, 4% packet loss
round-trip min/avg/max = 38.6/53.2/79.3 ms

[cardwell@grad-pc26]$ traceroute cayuse.cs.berkeley.edu
traceroute to cayuse.cs.berkeley.edu (128.32.33.33), 30 hops max, 40 byte
packets
1 vacumatic.cac.washington.edu (128.95.4.100) 0.868 ms 0.823 ms 0.811
ms
2 uwbr2-FE0-1-0.cac.washington.edu (140.142.150.24) 1.02 ms 0.677 ms
0.777 ms
3 seatr1-fste.nwnet.net (204.200.8.3) 77.72 ms 5.544 ms 204.464 ms
4 166.48.205.253 (166.48.205.253) 321.938 ms 366.01 ms 12.755 ms
5 core5.SanFrancisco.mci.net (204.70.4.85) 17.484 ms 17.204 ms 17.182
ms
6 pb-nap-OC3-1.exodus.net (198.32.128.25) 21.377 ms 23.108 ms 23.032
ms
7 scca-02-f8-0-0.core.exodus.net (209.1.169.145) 31.122 ms 32.554 ms
30.729 ms
8 209.185.71.24 (209.185.71.24) 30.792 ms 31.464 ms 32.549 ms
9 scca-xgty.ucnet.net (209.185.111.30) 37.793 ms 36.41 ms *
10 bgty-H9-0-0-T3.ucnet.net (192.35.216.57) 34.881 ms 34.367 ms 36.451
ms
11 f5-0.inr-666-eva.berkeley.edu (198.128.16.21) 36.039 ms 33.204 ms
38.185 ms
12 * f1-0-0.inr-107-eva.Berkeley.EDU (128.32.2.1) 34.896 ms *
13 f1-0.inr-180-soda.Berkeley.EDU (128.32.120.180) 38.899 ms 41.908 ms
42.144 ms
14 cayuse.CS.Berkeley.EDU (128.32.33.33) 52.166 ms 62.162 ms 66.082 ms