[j-nsp] Can someone tell me the reason?

[Andrew Jones]

Looks like someone doing some testing, inserting a route and seeing how 
different ASes handle seeing a default with their own AS in the path. 
What provider are you seeing it from?


On 18.03.2013 10:09, Ali Sumsam wrote:
> Hi All,
>
> What could be the reason of these AS numbers appearing in the AS 
> path...
>
> myname at juniper-mx5> show route
>
> inet.0: 450219 destinations, 450670 routes (450219 active, 0 
> holddown, 397
> hidden)
> + = Active Route, - = Last Active, * = Both
>
> 0.0.0.0/0          *[Aggregate/130] 2w2d 23:35:15
>                       Discard
>                     [BGP/170] 00:11:08, localpref 100, from 1.1.1.1
>                       AS path: {24 174 209 306 310 317 575 701 702 
> 719 721
> 1126 1221 1239 1273 1299 1491 1562 1565 1705 1733 2118 2143 2381 2497 
> 2519
> 2549 2687 2764 2828 2914 3043 3216 3257 3320 3335 3356 3471 3472 3491 
> 3527
> 3538 3544 3549 3561 3741 3786 3816 4021 4323 4436 4451 4538 4589 4610 
> 4637
> 4648 4651 4657 4678 4725 4755 4761 4768 4809 4826 4830 5078 5087 5180 
> 5387
> 5400 5410 5416 5531 5580 5588 5606 5714 5730 5800 6006 6045 6057 6128 
> 6150
> 6221 6429 6453 6461 6473 6503 6539 6666 6667 6713 6762 6828 6833 6939 
> 6983
> 7004 7017 7018 7065 7204 7303 7381 7470 7473 7474 7514 7598 7670 7684 
> 7690
> 7713 7714 7843 7862 7922 7936 7992 8218 8331 8359 8399 8400 8448 8492 
> 8551
> 8744 8918 8926 9304 9318 9370 9381 9398 9498 9505 9556 9607 9730 9772 
> 9785
> 9822 9829 9876 9885 9901 9971 10002 10026 10098 10213 10329 10578 
> 10778
> 10796 10848 10910 10912 10913 11051 11071 11123 11164 11190 11310 
> 11340
> 11399 11427 11664 11700 11857 11986 11992 12056 12179 12182 12315 
> 12389
> 12523 12670 12880 12956 12975 12989 13079 13194 13249 13536 13602 
> 13692
> 13693 13768 13789 13855 14105 14234 14627 15139 15290 15348 15412 
> 15533
> 15611 15935 16022 16125 16265 16345 16625 16796 16810 16813 16841 
> 16969
> 17067 17224 17225 17232 17379 17408 17444 17462 17537 17573 17645 
> 17659
> 17746 17819 17826 17888 17916 17917 18101 18150 18272 18345 18411 
> 18678
> 18747 18779 18804 18895 18990 19024 19029 19037 19048 19092 19108 
> 19151}
> {19559 19893 19938 20183 20258 20367 20394 20460 20485 20521 20847 
> 20870
> 20926 20940 21011 21127 21191 21341 21430 21437 21497 21555 21667 
> 22080
> 22211 22286 22489 22724 22806 22822 22909 22925 23265 23308 23498 
> 23520
> 23550 23563 23649 23801 23930 24005 24115 24157 24203 24213 24273 
> 24279
> 24324 24523 24582 24626 24631 24785 25155 25178 25252 25381 25861 
> 25899
> 25973 26065 26615 26878 26982 27033 27046 27064 27065 27066 27067 
> 27137
> 27281 27288 27364 27524 27630 27668 27757 27765 27814 27978 28168 
> 28210
> 28513 28730 28745 29049 29066 29067 29170 29761 30116 30170 30458 
> 30628
> 30831 30988 31205 31765 31838 32066 32097 32556 32611 32743 33029 
> 33363
> 33860 33874 34170 34248 34772 34857 34953 34968 35176 35400 35575 
> 35641
> 35645 35735 35788 35863 36029 36075 36089 36433 36514 36682 37088 
> 37100
> 37162 37183 37209 37282 37986 38072 38144 38145 38249 38413 38418 
> 38496
> 38567 38794 38862 39179 40170 40414 41038 41221 41465 41574 41677 
> 41696
> 42465 42861 43267 43419 43531 44356 44596 44654 44953 45144 45147 
> 45352
> 45425 45725 45841 45891 45903 46043 46068 46127 46389 46837 46838 
> 46868
> 46883 46887 46996 47019 47171 47313 47909 48268 48392 48524 48539 
> 48645
> 49550 49777 49895 50189 50261 50362 50545 50607 50670 50976 51034 
> 51360
> 51696 52145 52246 52255 52349 52879 53099 53153 53157 53340 53667 
> 54503
> 55309 55318 55321 55325 55566 55666 55824 56239 56308 56442 58247 
> 58552
> 58621 59616 61141 61294 61297 131127 131215 131351 131706 131771 
> 132375
> 132447 196745 197043 197191 197377 197930 198004 198151 198235 198646
> 199481 262232 262271 262519 262589} ?
>                     > to 1.1.1.1 via ge-1/0/0.100
>
> *Ali Sumsam CCIE*
> *Network Engineer - Level 3*
> eintellego Pty Ltd
> ali at eintellego.net ; www.eintellego.net
>
> Phone: 1300 753 383 ; Fax: (+612) 8572 9954
>
> Cell +61 (0)410 603 531
>
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>
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