Dear RIS engineer/users,

Greetings!

I've been seeing inconsistent and slow download speed when trying to access RIPE RIS MRT files from the US. I'd like to share what I observed and I hope this could be helpful in resolving the underlying problem.

In early January, I noticed a consistent sub 500KBps download speed, observed from multiple locations myself (from boxes at ATT, Equinix Metal, and via Cloudflare WARP). I also posted a quick twitter survey and received multiple responses saying the same https://twitter.com/heymingwei/status/1742959348396220557. The situation seems to be resolved a few days later, going back to 20MBps speed at home for me.

Today, I again see consistent <1MBps speed from the US west coast at home with 1Gbps symmetric link (AS7018 ATT).
image.png

Here is the traceroute from my location (no VPN, 1Gig ATT fiber) to data.ris.ripe.net:

➜  /tmp traceroute -a -q 1 data.ris.ripe.net
traceroute to ftp.ripe.net (193.0.11.24), 64 hops max, 52 byte packets
 1  [AS0] unifi (10.0.0.1)  2.858 ms
 2  [AS0] 192.168.1.254 (192.168.1.254)  0.899 ms
 3  [AS0] 108-238-20-1.lightspeed.sndgca.sbcglobal.net (108.238.20.1)  4.446 ms
 4  [AS7132] 71.157.6.120 (71.157.6.120)  4.558 ms
 5  [AS7018] 12.123.215.174 (12.123.215.174)  16.459 ms
 6  [AS7018] la2ca22crs.ip.att.net (12.122.2.69)  14.652 ms
 7  [AS7018] ggr2.la2ca.ip.att.net (12.122.129.105)  10.493 ms
 8  [AS0] ae7.cr4-lax2.ip4.gtt.net (199.229.231.29)  9.350 ms
 9  [AS3257] ae1.cr3-ams2.ip4.gtt.net (89.149.128.117)  170.055 ms
10  *
11  *
12  *
13  *

Please let me know if there is any other info that I can provide that may help.

Cheers,
Mingwei