Anyone from ARIN listening?

[Bernhard Schmidt]

Pekka Savola wrote:

> ARIN's IPv6 connectivity appears to be pretty broken.  I recall this has
> been the case for some time now. The largest IPv6 packet that gets
> through seems to be 1480 bytes.  Bigger ones (or more likely, return
> packets) are silently blackholed, I don't see any ICMPv6 Packet too Big
> messages either.  They advertise full TCP MSS of 1440 to boot.
> 
> As a result, trying to open www.arin.net with a graphical web browser
> (lynx is OK because it keeps the page size down) stalls for infinite time.

Same here, forward path is 12816 680 3549 30071 10745

bschmidt at lxbsc01:~> tracepath6 www.arin.net
 1?: [LOCALHOST]                      pmtu 1500
 1:  vl-23.csr1-2wr.lrz-muenchen.de             1. 81ms
 2:  xr-gar1-te1-3.x-win.dfn.de                 0.843ms
 3:  2001:638:c:c043::2                         8.371ms
 4:  2001:450:2002:25::1                        8.316ms
 5:  equi6ix.dc.gblx.net                      asymm  6 101.371ms
 6:  ibr01-ve96.asbn01.occaid.net             101.796ms
 7:  arin-ic-1605-wdc.customer.occaid.net     102.812ms
 8:  no reply
 9:  no reply

return path is symetric (30071 3549 680 12816) according to GRH.

Another location (AS29259, 2001:1b10::/32) works fine (tracepath6
stalls, but curl http://www.arin.net/index.shtml works)

 1?: [LOCALHOST]                      pmtu 1500
 1:  backbone2-gige-0-3-15.teleport-iabg.de     1.146ms
 2:  mchn-s1-rou-1030.DE.eurorings.net          2.783ms
 3:  ffm-s1-rou-1030.DE.eurorings.net         asymm  2  11.868ms
 4:  ge-6-0-0.fra10.ip6.tiscali.net           asymm  5  13.385ms
 5:  so-0-0-0.par77.ip6.tiscali.net           asymm  6  22.599ms
 6:  so-5-0-0.par22.ip6.tiscali.net           asymm  7  23.013ms
 7:  so-2-0-0.was10.ip6.tiscali.net           asymm  8 100.493ms
 8:  ibr01-ve96.asbn01.occaid.net             109.494ms
 9:  arin-ic-1605-wdc.customer.occaid.net     asymm  8 109.225ms
10:  no reply
11:  no reply

return path would be 30071 41692 8767 29259 here.

Third location (AS31333, 2001:4d88::/32) stalls again, I don't have
access to their BGP but trace shows Tiscali-OCCAID-ARIN as well. Return
path is 30071 3549 15598 31333.

All that would point to OCCAID-GBLX. http://www.occaid.org loads fine
for me as well, but there is a tunnel involved inside OCCAID

 9:  ibr01-ve96.asbn01.occaid.net             asymm  8 109.027ms
10:  ibr01-ve96.asbn01.occaid.net             asymm  8 109.017ms pmtu 1480
10:  bbr01-p2-1.nwrk01.occaid.net             asymm  9 117.058ms

if the path is symmetric return traffic would see pMTU to 1480 inside
OCCAID, so pMTU issues on OCCAID-GBLX might not be seen.

Regards,
Bernhard