Tata Scenic routing in LAX area?

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1

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@inap.com

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2

That’s quite the tour…

From Montreal, QC

traceroute to 23.92.178.22 (23.92.178.22), 30 hops max, 60 byte packets
1 67-221-x-x.ebox.net (67.221.x.x) 0.459 ms 0.431 ms 0.409 ms
2 ix-ae-10-190.tcore1.mtt-montreal.as6453.net (206.82.135.105) 5.637 ms 5.619 ms 5.588 ms
3 if-ae-12-2.tcore1.w6c-montreal.as6453.net (64.86.31.27) 246.680 ms 246.682 ms 246.723 ms
4 if-ae-30-2.tcore2.ct8-chicago.as6453.net (66.198.96.24) 257.231 ms 257.275 ms 257.286 ms
5 if-ae-22-2.tcore1.ct8-chicago.as6453.net (64.86.79.2) 249.929 ms 249.807 ms 249.989 ms
6 if-ae-29-2.tcore2.sqn-san-jose.as6453.net (64.86.21.104) 257.468 ms 257.206 ms 257.211 ms
7 if-ae-1-2.tcore1.sqn-san-jose.as6453.net (63.243.205.1) 251.862 ms 251.116 ms 250.928 ms
8 if-ae-18-2.tcore2.sv1-santa-clara.as6453.net (63.243.205.13) 251.988 ms if-ae-13-2.tcore2.lvw-los-angeles.as6453.net (64.86.252.26) 254.136 ms if-ae-38-2.tcore2.sv1-santa-clara.as6453.net (63.243.205.75) 252.838 ms
9 if-ae-7-2.tcore2.svw-singapore.as6453.net (180.87.15.25) 254.861 ms if-ae-0-2.tcore1.sv1-santa-clara.as6453.net (63.243.251.1) 267.270 ms if-ae-7-2.tcore2.svw-singapore.as6453.net (64.86.252.39) 259.345 ms
10 if-ae-20-2.tcore1.svq-singapore.as6453.net (180.87.96.21) 250.794 ms if-et-1-2.hcore2.kv8-chiba.as6453.net (120.29.211.3) 181.610 ms if-ae-20-2.tcore1.svq-singapore.as6453.net (180.87.96.21) 250.683 ms
11 120.29.215.202 (120.29.215.202) 256.046 ms if-ae-23-2.tcore1.svw-singapore.as6453.net (180.87.67.32) 253.692 ms 120.29.215.202 (120.29.215.202) 255.907 ms
12 * * *
13 if-ae-20-2.tcore1.svq-singapore.as6453.net (180.87.96.21) 253.551 ms unknown.telstraglobal.net (202.127.73.101) 280.228 ms if-ae-20-2.tcore1.svq-singapore.as6453.net (180.87.96.21) 254.633 ms
14 120.29.215.242 (120.29.215.242) 254.595 ms 269.004 ms 265.841 ms
15 i-10850.eqnx-core02.telstraglobal.net (202.84.140.46) 248.997 ms 249.750 ms 249.693 ms
16 i-92.eqnx03.telstraglobal.net (202.84.247.17) 247.845 ms unknown.telstraglobal.net (202.127.73.101) 267.627 ms i-92.eqnx03.telstraglobal.net (202.84.247.17) 249.147 ms
17 * i-93.sgpl-core02.telstraglobal.net (202.84.224.189) 255.787 ms *
18 bbr1.inapbb-dal-sje-1-2-4-6.dal006.pnap.net (64.95.158.182) 261.728 ms bbr2.ae7.sje.pnap.net (64.95.158.178) 248.810 ms bbr1.inapbb-dal-sje-1-2-4-6.dal006.pnap.net (64.95.158.182) 261.988 ms
19 i-92.eqnx03.telstraglobal.net (202.84.247.17) 250.373 ms 245.202 ms bbr2.xe-1-1-1.inapbb-chg-sje-8.chg.pnap.net (64.95.159.21) 260.105 ms
20 * * bbr1.xe-0-0-1.inapbb-wdc-dal-7.wdc002.pnap.net (64.95.158.210) 260.176 ms
21 bbr2.ae7.sje.pnap.net (64.95.158.178) 247.134 ms 251.671 ms bbr1.inapbb-dal-sje-1-2-4-6.dal006.pnap.net (64.95.158.182) 264.785 ms
22 bbr2.xe-1-1-1.inapbb-chg-sje-8.chg.pnap.net (64.95.159.21) 263.305 ms * 64.95.159.45 (64.95.159.45) 287.747 ms
23 bbr1.ae7.nym007.pnap.net (64.95.158.73) 263.963 ms bbr1.xe-4-0-0.inapbb-chg-nym-12.nym007.pnap.net (64.95.159.18) 251.967 ms *
24 tsr1.e6-1.nyj004.pnap.net (64.95.158.234) 267.155 ms 263.123 ms *
25 64.95.159.45 (64.95.159.45) 266.946 ms * *
26 * bbr1.ae7.nym007.pnap.net (64.95.158.73) 266.049 ms *
27 * * tsr1.e6-1.nyj004.pnap.net (64.95.158.234) 262.634 ms
28 * * *
29 * * *
30 * * *

3

From East Coast:

root@dns1:~# traceroute 23.92.178.22

traceroute to 23.92.178.22 (23.92.178.22), 30 hops max, 60 byte packets

1 gw-128-254.phlapalo.quonix.net (208.82.128.254) 0.657 ms 0.657 ms 0.651 ms
2 te0-0-2-3.nr11.b002999-2.phl01.atlas.cogentco.com (38.104.111.121) 1.057 ms 1.118 ms 1.196 ms
3 te0-1-0-0.rcr21.phl01.atlas.cogentco.com (154.24.50.85) 1.018 ms te0-1-0-0.rcr22.phl01.atlas.cogentco.com (154.24.50.89) 0.971 ms te0-1-0-0.rcr21.phl01.atlas.cogentco.com (154.24.50.85) 1.049 ms
4 be2333.ccr42.jfk02.atlas.cogentco.com (154.54.5.1) 3.775 ms be2364.ccr41.jfk02.atlas.cogentco.com (154.54.3.141) 3.756 ms 3.756 ms
5 be3295.ccr31.jfk05.atlas.cogentco.com (154.54.80.2) 3.767 ms be3294.ccr31.jfk05.atlas.cogentco.com (154.54.47.218) 3.877 ms be3295.ccr31.jfk05.atlas.cogentco.com (154.54.80.2) 3.772 ms
6 38.104.74.130 (38.104.74.130) 4.807 ms 5.371 ms 5.414 ms
7 border1-po1-bbnet1.nyj004.pnap.net (216.52.95.46) 3.360 ms 3.343 ms 3.316 ms
8 inapvoxcust-XX.border1.nyj004.pnap.net (74.201.136.66) 12.197 ms 12.222 ms 12.468 ms
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4

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

5

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).

6

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).

huh… us-carrier → tata → airtel → telstra … that seems TOTALLY PLAUSIBLE… no.

7

I have tried to reach out to Airtel, no response yet, but yah I could see my issue being due to them leaking routes.

-Marcus

8

9498/Airtel seems to be leaking a lot of routes.

Source: https://bgpstream.com/

All Events for BGP Stream.

9

I don’t know what’s less surprising, Tata making sure you see the entire internet (wink wink), or Airtel leaking routes… :slight_smile:

10

Airtel has acknowledged and is in the process of reverting. Thanks all for your input.

-Marcus

11

I have shared about this leak with known contacts in their NOC.

Thanks.