Hi,
again, here is a new route flap report. The villains from the
top of the previous report have apparently fixed their problem,
but a few ASes again manage to get the dubious position at the
top of the list with more than 20.000 route flaps in the 24 hours
from Oct 12 03:05 GMT to Oct 13 03:05 GMT.
Again I would like to draw to your attention the fact that some
destinations are apparently being originated by more than one AS.
These show up in the report with more then one origin. I was
under the impression that thsi is an illegal or highly
undesireable configuration; I would still like to hear some
comments on this issue.
The top 20 were:
Origin(s) flaps retr unrch dests AS AS Description
1717 26152 9317 9459 594 1717 RENATER
174:2149 21315 3503 3838 1019 2149 PSINET-2
174:2149 21315 3503 3838 1019 174 NYSERNET-AS
1270 7441 3020 3026 242 1270 EUnet/DE
701 6187 1863 1970 872 701 AlterNet
517 4397 1485 1514 117 517 XLINK-UKA
1237 3689 1172 1176 103 1237 EUNSOL-AS
1899 2854 1230 1274 115 1899 Fnet, EUnet-France
86 2845 592 740 452 86 SURANET-AS
378 2789 387 630 127 378 ILAN
1836 2541 1251 1249 62 1836 EUnet/CH Autonomous System
2551 2519 395 421 196 2551 NETCOM-AS
279 2331 743 1186 490 279 SURANET-AS-2
1290 1922 674 698 81 1290 EUnet GB
3354 1907 307 400 216 3354 THENET-AS-1
2915 1576 202 252 101 2915 SPIN-NET
174 1554 428 470 124 174 NYSERNET-AS
1250 1544 353 521 343 1250 SINGAPORE-AS
137 1410 163 182 169 137 GARR
2715 1385 377 383 18 2715 REDERIO-AS
Legend:
"Origin(s)" are the AS or ASes seen as "origin" of routing updates
(essentially the last element in the logged path).
"flaps" is the sum of "retr" and the number of times the route was
updated (e.g. new path)
"retr" is the number of times a route was withdrawn (retracted)
"unrch" is the number of withdrawals which caused loss of
connectivity for a destination
"dests" is the number of destinations involved in route flaps
"AS description" was what the RIPE database told me last time I
looked up the AS descriptions or AS names.
Excluded from this picture are any routes involving as-sets
(there are a number of routing flaps involving them as well, I'll
hopefully get some time to analyzing them separately sometime
later...).
Attached below you will find a more detailed report showing the
number of times each individual path was announced for each of the
entries on the "top 20" list, I can also easily (on request) produce
a "per-network" report for any given AS.
Regards,
- Havard
------------------------------
Origin(s) flaps retr unrch dests AS AS Description
1717 26152 9317 9459 594 1717 RENATER
Count Path
11275 2603 1755 1717
6795 2603 3224 2043 1128 1755 1717
234 2603 3224 2043 1128 1133 1800 1755 1717
Origin(s) flaps retr unrch dests AS AS Description
174:2149 21315 3503 3838 1019 2149 PSINET-2
Count Path
4724 2603 1805 1800 690 2149
446 2603 1755 1800 690 2149
572 2603 1805 1800 1133 690 2149
110 2603 1805 1800 1239 1240 690 2149
77 2603 1805 1800 701 690 2149
7 2603 1755 1800 1239 1240 690 2149
10 2603 1755 1800 1133 690 2149
9 2603 1755 1800 701 690 2149
2 2603 1805 1800 1133 1674 690 2149
8 2603 1805 1800 1239 690 2149
1 2603 1755 1800 1133 1674 690 2149
Origin(s) flaps retr unrch dests AS AS Description
174:2149 21315 3503 3838 1019 174 NYSERNET-AS
Count Path
9673 2603 1805 1800 174
1598 2603 1755 1800 174
609 2603 1805 1800 690 174
70 2603 1805 1800 1239 1280 174
114 2603 3224 2043 1128 1133 1800 174
66 2603 1755 1800 690 174
55 2603 1755 1800 1133 690 174
92 2603 1805 1800 1133 690 174
11 2603 1805 1800 690 701 174
18 2603 1755 1800 1239 1280 174
23 2603 1805 1800 701 690 174
1 2603 1755 1800 701 690 174
Origin(s) flaps retr unrch dests AS AS Description
1270 7441 3020 3026 242 1270 EUnet/DE
Count Path
4421 2603 3224 2043 1128 286 1270
Origin(s) flaps retr unrch dests AS AS Description
701 6187 1863 1970 872 701 AlterNet
Count Path
2789 2603 1805 1800 701
160 2603 1805 1800 1239 1280 701
441 2603 1755 1800 701
71 2603 1755 1800 1239 1280 701
546 2603 1805 1800 690 701
45 2603 1805 1800 1133 690 701
56 2603 3224 2043 1128 1133 1800 701
273 2603 3224 2043 1128 1133 701
36 2603 1755 1800 690 701
Origin(s) flaps retr unrch dests AS AS Description
517 4397 1485 1514 117 517 XLINK-UKA
Count Path
945 2603 3224 2043 1128 1755 1273 517
1483 2603 1755 1273 517
286 2603 1755 1800 690 1324 517
20 2603 1805 1800 701 690 1324 517
46 2603 3224 2043 1128 1133 1800 1755 1273 517
91 2603 1805 1800 690 1324 517
25 2603 1805 1800 1133 690 1324 517
16 2603 1755 1800 1133 690 1324 517
Origin(s) flaps retr unrch dests AS AS Description
1237 3689 1172 1176 103 1237 EUNSOL-AS
Count Path
874 2603 1805 1800 1237
1236 2603 3224 2043 786 1129 1237
407 2603 1755 1800 1237
Origin(s) flaps retr unrch dests AS AS Description
1899 2854 1230 1274 115 1899 Fnet, EUnet-France
Count Path
1624 2603 3224 2043 1128 286 1899
Origin(s) flaps retr unrch dests AS AS Description
86 2845 592 740 452 86 SURANET-AS
Count Path
1402 2603 1805 1800 86
215 2603 1805 1800 690 279 3561 86
30 2603 1805 1800 1133 690 279 3561 86
71 2603 1755 1800 690 279 3561 86
55 2603 1805 1800 1239 1280 1957 690 279 3561 86
3 2603 1805 1800 701 690 279 3561 86
14 2603 1755 1800 1239 1280 1957 690 279 3561 86
10 2603 1755 1800 1133 690 279 3561 86
1 2603 1805 1800 1133 1674 690 279 3561 86
54 2603 1805 1800 690 279 86
308 2603 1805 1800 690 86
51 2603 1755 1800 86
23 2603 1805 1800 1239 1280 1957 690 86
5 2603 1755 1800 1239 1280 1957 690 86
3 2603 1805 1800 701 690 86
6 2603 1805 1800 1133 690 86
4 2603 1805 1800 1239 1280 1957 690 279 86
3 2603 1755 1800 1239 1280 1957 690 279 86
4 2603 1755 1800 690 86
3 2603 1755 1800 1133 690 86
Origin(s) flaps retr unrch dests AS AS Description
378 2789 387 630 127 378 ILAN
Count Path
1280 2603 1755 378
686 2603 1755 1800 174 378
327 2603 1805 1800 174 378
19 2603 1755 1800 690 174 378
44 2603 3224 2043 1128 1755 378
22 2603 3224 2043 1128 1133 1800 174 378
6 2603 1805 1800 690 174 378
6 2603 3224 2043 1128 1133 1800 1755 378
7 2603 1755 1800 701 690 174 378
3 2603 1805 1800 701 690 174 378
1 2603 1755 1800 1133 1674 690 174 378
1 2603 1805 1800 1133 1674 690 174 378
Origin(s) flaps retr unrch dests AS AS Description
1836 2541 1251 1249 62 1836 EUnet/CH Autonomous System
Count Path
1290 2603 3224 2043 1128 286 1836
Origin(s) flaps retr unrch dests AS AS Description
2551 2519 395 421 196 2551 NETCOM-AS
Count Path
909 2603 1805 1800 2551
693 2603 1805 1800 690 1321 2551
119 2603 1755 1800 2551
138 2603 1755 1800 1239 1280 2551
145 2603 1805 1800 1239 1280 2551
20 2603 1805 1800 690 2551
48 2603 3224 2043 1128 1133 2551
10 2603 1805 1800 1133 690 1321 2551
15 2603 1755 1800 690 1321 2551
4 2603 1805 1800 1133 1674 690 2551
2 2603 1755 1800 1133 690 2551
8 2603 1805 1800 1133 690 2551
6 2603 1805 1800 701 690 1321 2551
1 2603 1805 1800 1133 1674 690 1321 2551
2 2603 1755 1800 690 2551
3 2603 3224 2043 1128 1133 1800 2551
1 2603 1755 1800 701 690 1321 2551
Origin(s) flaps retr unrch dests AS AS Description
279 2331 743 1186 490 279 SURANET-AS-2
Count Path
764 2603 1805 1800 86 279
82 2603 1805 1800 1239 1280 1957 690 86 279
371 2603 1755 1800 86 279
116 2603 1805 1800 1133 690 279
80 2603 1805 1800 1239 690 279
52 2603 1805 1800 690 86 3561 279
46 2603 1805 1800 690 86 279
45 2603 1805 1800 690 279
2 2603 1805 1800 1239 1280 1957 690 279
10 2603 1805 1800 1133 690 86 279
3 2603 1755 1800 1239 1280 1957 690 86 279
4 2603 1755 1800 690 279
10 2603 1755 1800 690 86 279
3 2603 1755 1800 1133 690 279
2 2603 1805 1800 701 690 279
Origin(s) flaps retr unrch dests AS AS Description
1290 1922 674 698 81 1290 EUnet GB
Count Path
1248 2603 3224 2043 1128 286 1290
Origin(s) flaps retr unrch dests AS AS Description
3354 1907 307 400 216 3354 THENET-AS-1
Count Path
436 2603 1755 1800 1239 3354
886 2603 1805 1800 1239 3354
238 2603 1805 1800 690 3354
14 2603 1805 1800 1133 690 3354
16 2603 3224 2043 1128 1133 1239 3354
2 2603 1805 1800 1239 1240 690 3354
7 2603 3224 2043 1128 1133 1800 1239 3354
1 2603 1755 1800 690 3354
1 2603 1805 1800 1239 1240 690 114 3354
2 2603 1805 1800 690 114 3354
Origin(s) flaps retr unrch dests AS AS Description
2915 1576 202 252 101 2915 SPIN-NET
Count Path
335 2603 1805 1800 690 2149 174 2713 2915
840 2603 1805 1800 174 2713 2915
199 2603 1755 1800 174 2713 2915
Origin(s) flaps retr unrch dests AS AS Description
174 1554 428 470 124 174 NYSERNET-AS
Count Path
775 2603 1805 1800 174
301 2603 1755 1800 174
24 2603 1805 1800 1239 1280 174
35 2603 3224 2043 1128 1133 1800 174
23 2603 1805 1800 1133 690 174
23 2603 1755 1800 1133 690 174
8 2603 1755 1800 1239 1280 174
1 2603 1805 1800 690 174
2 2603 3224 2043 1128 1133 3561 174
Origin(s) flaps retr unrch dests AS AS Description
1250 1544 353 521 343 1250 SINGAPORE-AS
Count Path
912 2603 1805 1800 690 97 1250
14 2603 1755 1800 690 97 1250
1 2603 1755 1800 1239 1240 690 97 1250
240 2603 1805 1800 1239 1280 97 1250
6 2603 1755 1800 1133 690 97 1250
9 2603 1805 1800 1133 690 97 1250
8 2603 1755 1800 1239 1280 97 1250
1 2603 1805 1800 1239 1240 690 97 1250
Origin(s) flaps retr unrch dests AS AS Description
137 1410 163 182 169 137 GARR
Count Path
423 2603 3224 2043 137
226 2603 1755 1128 2043 137
82 2603 1755 1800 86 293 3425 2038 513 2043 137
383 2603 1755 513 2038 137
61 2603 1805 1800 86 293 3425 2038 137
46 2603 3224 2043 1128 513 2038 137
13 2603 1755 1128 2043 513 2038 137
3 2603 1755 1800 293 3425 2038 513 1128 2043 137
2 2603 1805 1800 701 690 293 3425 2038 137
2 2603 1755 1800 701 690 293 3425 2038 137
2 2603 1755 1800 86 293 3425 2038 137
2 2603 3224 2043 513 2038 137
2 2603 1755 1800 86 293 3425 2038 513 1128 2043 137
Origin(s) flaps retr unrch dests AS AS Description
2715 1385 377 383 18 2715 REDERIO-AS
Count Path
619 2603 1805 1800 690 1740 2715
175 2603 1755 1800 690 1740 2715
14 2603 1755 1800 701 690 1740 2715
121 2603 1805 1800 701 690 1740 2715
77 2603 1805 1800 1133 690 1740 2715
11 2603 1755 1800 1133 690 1740 2715
4 2603 1805 1800 1133 1674 690 1740 2715