Tata Scenic routing in LAX area?

Thu Nov 15 20:19:59 UTC 2018

FYI 29791 isn't the only origin I'm seeing this on from one point of view:
                      AS path: 3257 6453 9498 4637
                      AS path: 3257 6453 9498 4637 10310 26085 14210
                      AS path: 3257 6453 9498 4637 20773 29066
                      AS path: 3257 6453 9498 4637 2906
                      AS path: 3257 6453 9498 4637 2906 40027
                      AS path: 3257 6453 9498 4637 29791
                      AS path: 3257 6453 9498 4637 30844
                      AS path: 3257 6453 9498 4637 30844 36991
                      AS path: 3257 6453 9498 4637 30844 38056 38056 38056
                      AS path: 3257 6453 9498 4637 37468 37230
                      AS path: 3257 6453 9498 4637 37468 37230 37230 37230
                      AS path: 3257 6453 9498 4637 47869
                      AS path: 3356 6453 9498 4637
                      AS path: 3356 6453 9498 4637 1299 2906
                      AS path: 3356 6453 9498 4637 1299 3491 20485 20485
4809 49209
                      AS path: 3356 6453 9498 4637 20773 29066
                      AS path: 3356 6453 9498 4637 2906
                      AS path: 3356 6453 9498 4637 29791
                      AS path: 3356 6453 9498 4637 30844
                      AS path: 3356 6453 9498 4637 30844 36991
                      AS path: 3356 6453 9498 4637 30844 38056 38056 38056
                      AS path: 3356 6453 9498 4637 37468 37230
                      AS path: 3356 6453 9498 4637 37468 37230 37230 37230
                      AS path: 3356 6453 9498 4637 47869

I'm not sure what is supposed to be there for 6453_9498 but I suspect not
nearly as much as is currently present (only 4637 listed here for brevity).

On Thu, Nov 15, 2018 at 2:53 PM John Weekes <jw at nuclearfallout.net> wrote:

> Marcus,
>
> From route-views output, it looks like AS9498/airtel is probably leaking
> your route between two of its upstreams (AS6453/Tata and AS4637/Telstra)
> overseas, funneling some of your traffic through their router.
>
> route-views>sh ip bgp 23.92.178.22 | i 9498
>   3356 6453 9498 4637 29791
>   1403 6453 9498 4637 29791
>   3549 3356 6453 9498 4637 29791
>   19214 3257 6453 9498 4637 29791
>   1403 6453 9498 4637 29791
>   286 6453 9498 4637 29791
>   53364 3257 6453 9498 4637 29791
>   3257 6453 9498 4637 29791
>   1239 6453 9498 4637 29791
>   2497 6453 9498 4637 29791
>   57866 6453 9498 4637 29791
>   7660 2516 6453 9498 4637 29791
>   701 6453 9498 4637 29791
>   3561 209 6453 9498 4637 29791
>
> You might try halting advertisements to your AS4637/Telstra peer while you
> contact AS9498.
>
> -John
>
> On 11/15/2018 10:43 AM, Marcus Josephson wrote:
>
> Anyone else seeing an odd Scenic routing in the LAX/SJE area for tata.
>
>
>
> traceroute to 23.92.178.22 (23.92.178.22), 30 hops max, 52 byte packets
>
> 1  if-ae-13-2.tcore2.lvw-los-angeles.as6453.net (64.86.252.34)  180.698
> ms  180.610 ms  181.712 ms
>
>      MPLS Label=344269 CoS=0 TTL=1 S=1
>
> 2  if-ae-7-2.tcore2.svw-singapore.as6453.net (180.87.15.25)  189.327 ms
> if-ae-7-2.tcore2.svw-singapore.as6453.net (64.86.252.37)  176.800 ms
> if-ae-7-2.tcore2.svw-singapore.as6453.net (64.86.252.39)  174.631 ms
>
>      MPLS Label=609315 CoS=0 TTL=1 S=1
>
> 3  if-ae-20-2.tcore1.svq-singapore.as6453.net (180.87.96.21)  174.287 ms
> 173.370 ms  173.804 ms
>
> 4  120.29.215.202 (120.29.215.202)  179.104 ms  179.367 ms  179.324 ms
>
> 5  182.79.152.247 (182.79.152.247)  180.164 ms 182.79.152.253
> (182.79.152.253)  184.816 ms 182.79.152.247 (182.79.152.247)  250.928 ms
>
> 6  unknown.telstraglobal.net (202.127.73.101) [AS  4637]  173.974 ms
> 173.986 ms  173.484 ms
>
> 7  i-93.sgpl-core02.telstraglobal.net (202.84.224.189) [AS  4637]
> 175.094 ms  175.699 ms  174.343 ms
>
> 8  i-10850.eqnx-core02.telstraglobal.net (202.84.140.46) [AS  4637]
> 280.686 ms  288.703 ms  280.836 ms
>
> 9  i-92.eqnx03.telstraglobal.net (202.84.247.17) [AS  4637]  278.021 ms
> 276.637 ms  302.249 ms
>
> 10  equinix-ix.sjc1.us.voxel.net (206.223.116.4)  174.139 ms  174.163 ms
> 174.067 ms
>
>
>
>
>
> Marcus Josephson
>
> IP Operations
>
>
>
> mjosephson at inap.com
>
>
>
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