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IPv6 FTP performance


Tarball
15-06-2008, 23:29
I'm getting great speeds on the RIPE file from ovh and from home ipv6. On the other file, I'm only getting around 10kb/s from ovh, but 100kb/s from home.

Murph
14-06-2008, 12:55
I suspect that I'm probably in a very small minority of folk actually routinely using IPv6, but I'm wondering if anyone else has been seeing exceptionally slow FTP download performance over IPv6?

Downloading ftp://ftp.OpenLDAP.org/pub/OpenLDAP/...dap-2.3.42.tgz over IPv6 is painfully slow, often giving less than 1KB/s, and frequently stalling. Downloading over IPv4 gives a much more respectable average of 169KB/s.

Here are the IPv6 and IPv4 traceroutes:

[root@srv00 ~]# traceroute6 ftp.openldap.org
traceroute6 to www.openldap.org (2001:4f8:3:ba:2e0:18ff:fe02:efec) from 2001:41d0:1:dbae::, 64 hops max, 12 byte packets
1 2001:41d0:1:dbff:ff:ff:ff:ff 0.431 ms * 0.400 ms
2 * * *
3 2001:5a0:1900::9 4.107 ms 3.973 ms 3.950 ms
4 2001:5a0:1900::2 4.275 ms 4.160 ms 4.145 ms
5 if-5-0.mcore3.l78-london.ipv6.teleglobe.net 12.025 ms 11.895 ms 11.889 ms
6 2001:5a0:c00:100::1 12.217 ms 12.189 ms 12.157 ms
7 2001:5a0:c00:100::3a 12.282 ms 12.149 ms 12.193 ms
8 xe-0-1-0.r22.londen03.uk.bb.gin.ntt.net 60.132 ms 12.234 ms 12.197 ms
9 as-0.r20.nycmny01.us.bb.gin.ntt.net 88.348 ms 86.179 ms 86.600 ms
10 ae-0.r21.nycmny01.us.bb.gin.ntt.net 87.767 ms 85.804 ms 85.800 ms
11 * * *
12 ae-0.r21.chcgil09.us.bb.gin.ntt.net 108.675 ms 108.612 ms 113.902 ms
13 p64-3-1-0.r20.snjsca04.us.bb.gin.ntt.net 167.966 ms 162.752 ms 162.812 ms
14 ae-1.r21.plalca01.us.bb.gin.ntt.net 173.104 ms 172.940 ms 167.791 ms
15 xe-3-4.r03.plalca01.us.bb.gin.ntt.net 167.861 ms 173.803 ms 173.019 ms
16 ge-0.isc.plalca01.us.bb.gin.ntt.net 173.283 ms 173.404 ms 168.200 ms
17 int-0-2-0-800.r3.sfo2.isc.org 169.075 ms 174.128 ms 174.139 ms
18 sfo2-sql1.r1.sql1.isc.org 169.469 ms 169.261 ms 174.573 ms
19 boole.openldap.org 174.781 ms 169.523 ms 169.503 ms
[root@srv00 ~]# traceroute ftp.openldap.org
traceroute to www.openldap.org (204.152.186.57), 64 hops max, 52 byte packets
1 rbx-48-m2.routers.ovh.net (91.121.154.252) 0.554 ms 0.370 ms 0.345 ms
2 91.121.130.130 (91.121.130.130) 0.229 ms * 0.263 ms
3 rbx-1-6k.routers.ovh.net (213.251.191.1) 0.339 ms * 0.360 ms
4 gsr12416.ams.he.net (195.69.145.150) 5.796 ms 5.612 ms 5.635 ms
5 10gigabitethernet1-4.core1.lon1.he.net (72.52.92.81) 12.601 ms 12.659 ms 12.656 ms
6 10gigabitethernet2-3.core1.nyc4.he.net (72.52.92.77) 81.699 ms 81.696 ms 81.723 ms
7 10gigabitethernet3-1.core1.sjc2.he.net (72.52.92.25) 160.933 ms 160.756 ms 160.848 ms
8 10gigabitethernet3-2.core1.pao1.he.net (72.52.92.69) 161.536 ms 161.492 ms 161.551 ms
9 he.pao1.isc.org (72.52.94.70) 159.142 ms 159.565 ms 159.063 ms
10 int-0-2-0-800.r3.sfo2.isc.org (149.20.65.131) 160.044 ms 159.882 ms 160.292 ms
11 int-0-2.r1.sql1.isc.org (149.20.65.1) 160.799 ms 160.293 ms 160.381 ms
12 www.openldap.org (204.152.186.57) 160.355 ms 160.431 ms 160.592 ms
[root@srv00 ~]#

I realise that IPv6 is very bleeding edge, so I'm rather wondering just how ready it is for production use from OVH?

Here's an example for ftp://ftp.ripe.net/ls-lR.gz, a much closer site that gives exceptionally good performance over IPv4, but very poor performance over IPv6:

[root@srv00 ~]# ftp ftp.ripe.net:/ls-lR.gz
Trying 2001:610:240:0:21::9...
Connected to hawk-ftp.ripe.net.
220 FTPD Server (RIPE NCC FTP server)
331 Anonymous login ok, send your complete email address as your password.
230-Welcome 2001:41d0:1:dbae::,
...
230 Anonymous access granted, restrictions apply.
Remote system type is UNIX.
Using binary mode to transfer files.
200 Type set to I
250 CWD command successful
local: ls-lR.gz remote: ls-lR.gz
229 Entering Extended Passive Mode (|||60410|)
150 Opening BINARY mode data connection for ls-lR.gz (472717 bytes)
100% |************************************************* ************************************************** ******************| 461 KB 4.03 KB/s 00:00 ETA
226 Transfer complete.
472717 bytes received in 01:54 (4.03 KB/s)
221 Goodbye.
[root@srv00 ~]# ftp -4 ftp.ripe.net:/ls-lR.gz
Connected to hawk-ftp.ripe.net.
220 FTPD Server (RIPE NCC FTP server)
331 Anonymous login ok, send your complete email address as your password.
230-Welcome srv00.inetstat.net,
...
230 Anonymous access granted, restrictions apply.
Remote system type is UNIX.
Using binary mode to transfer files.
200 Type set to I
250 CWD command successful
local: ls-lR.gz remote: ls-lR.gz
229 Entering Extended Passive Mode (|||60302|)
150 Opening BINARY mode data connection for ls-lR.gz (472717 bytes)
100% |************************************************* ************************************************** ******************| 461 KB 8.66 MB/s 00:00 ETA
226 Transfer complete.
472717 bytes received in 00:00 (7.74 MB/s)
221 Goodbye.
[root@srv00 ~]# traceroute6 ftp.ripe.net
traceroute6 to hawk-ftp.ripe.net (2001:610:240:0:21::9) from 2001:41d0:1:dbae::, 64 hops max, 12 byte packets
1 2001:41d0:1:dbff:ff:ff:ff:ff 0.697 ms * 0.439 ms
2 2001:41d0::552 0.421 ms 0.486 ms *
3 2001:41d0::5b1 53.552 ms * 4.285 ms
4 2001:41d0::210 13.735 ms 13.577 ms 13.664 ms
5 XSR03.Asd001A.surf.net 14.684 ms 14.308 ms 14.173 ms
6 nikrtr.ripe.net 14.405 ms 15.367 ms 18.673 ms
7 hawk-ftp.ripe.net 14.499 ms 14.547 ms 14.558 ms
[root@srv00 ~]# traceroute ftp.ripe.net
traceroute to hawk-ftp.ripe.net (193.0.0.215), 64 hops max, 52 byte packets
1 rbx-48-m2.routers.ovh.net (91.121.154.252) 0.498 ms 0.375 ms 0.361 ms
2 91.121.130.130 (91.121.130.130) 0.601 ms * 0.461 ms
3 rbx-1-6k.routers.ovh.net (213.251.191.1) 0.536 ms * 0.326 ms
4 telrtr.ripe.net (195.69.144.71) 5.759 ms 5.692 ms 5.761 ms
5 hawk.ripe.net (193.0.0.215) 6.070 ms 5.891 ms 5.960 ms
[root@srv00 ~]#