IPv6 sluggishness?

[morrowc@…]

maybe this is just me, but...

morrowc@morrowc:~$ ping6 mailserver.ops-netman.net
PING mailserver.ops-netman.net(mail-v6.ops-netman.net) 56 data bytes
64 bytes from mail-v6.ops-netman.net: icmp_seq=1 ttl=52 time=329 ms
64 bytes from mail-v6.ops-netman.net: icmp_seq=2 ttl=52 time=703 ms
64 bytes from mail-v6.ops-netman.net: icmp_seq=3 ttl=52 time=3934 ms
64 bytes from mail-v6.ops-netman.net: icmp_seq=4 ttl=52 time=3213 ms
64 bytes from mail-v6.ops-netman.net: icmp_seq=5 ttl=52 time=2223 ms
64 bytes from mail-v6.ops-netman.net: icmp_seq=6 ttl=52 time=1288 ms
64 bytes from mail-v6.ops-netman.net: icmp_seq=7 ttl=52 time=810 ms
64 bytes from mail-v6.ops-netman.net: icmp_seq=8 ttl=52 time=316 ms
64 bytes from mail-v6.ops-netman.net: icmp_seq=9 ttl=52 time=1249 ms
64 bytes from mail-v6.ops-netman.net: icmp_seq=10 ttl=52 time=250 ms
^C
--- mailserver.ops-netman.net ping statistics ---
11 packets transmitted, 10 received, 9% packet loss, time 10029ms
rtt min/avg/max/mdev = 250.498/1431.998/3934.122/1220.054 ms, pipe 4


the ipv4 path:
morrowc@morrowc:~$ traceroute mailserver.ops-netman.net
traceroute to mailserver.ops-netman.net (199.168.90.119), 30 hops max, 60 byte packets
 1  31.133.144.4 (31.133.144.4)  11.195 ms  29.022 ms  44.234 ms
 2  rtra-rtrhotela.meeting.ietf.org (31.130.231.34)  143.306 ms  187.403 ms  165.818 ms
 3  rc.prg.thamova18.dialtelecom.cz (82.113.52.70)  340.524 ms  318.838 ms  362.346 ms
 4  20ge1-3.core1.prg1.he.net (91.210.16.201)  388.270 ms  518.181 ms  496.465 ms
 5  100ge8-1.core1.fra1.he.net (184.105.213.233)  423.743 ms  474.549 ms  452.693 ms
 6  100ge5-2.core1.par2.he.net (72.52.92.13)  536.541 ms  541.046 ms  546.711 ms
 7  100ge10-2.core1.ash1.he.net (184.105.213.173)  550.251 ms  464.724 ms  462.860 ms
 8  deteque-llc.10gigabitethernet13-7.core1.ash1.he.net (209.51.161.134)  454.829 ms  337.791 ms  331.968 ms
 9  199.168.90.75 (199.168.90.75)  326.913 ms  319.628 ms  304.145 ms
10  mailserver.ops-netman.net (199.168.90.119)  291.729 ms  285.781 ms  282.677 ms

ipv6 path:
morrowc@morrowc:~$ traceroute6 mailserver.ops-netman.net
traceroute to mailserver.ops-netman.net (2606:700:e:550:b00b::b00b) from 2001:67c:1232:144:89de:9cd:7b9d:9411, port 33434, from port 58041, 30 hops max, 60 bytes packets
 1  * 2001:67c:1232:144::1 (2001:67c:1232:144::1)  12.859 ms  50.040 ms 
 2  rtra-rtrhotela.meeting.ietf.org (2001:67c:370:f231::34)  112.890 ms  101.611 ms  62.177 ms 
 3  2001:4de8:b0ba:c0d0::29:208 (2001:4de8:b0ba:c0d0::29:208)  149.064 ms  93.775 ms  47.251 ms 
 4  20ge1-3.core1.prg1.he.net (2001:7f8:14::6e:1)  118.860 ms  77.954 ms  57.773 ms 
 5  100ge8-1.core1.fra1.he.net (2001:470:0:213::1)  103.904 ms  94.047 ms  135.287 ms 
 6  100ge6-1.core1.lon2.he.net (2001:470:0:37::1)  129.284 ms  166.308 ms  98.990 ms 
 7  100ge1-1.core1.nyc4.he.net (2001:470:0:2cf::2)  199.448 ms  187.105 ms  91.177 ms 
 8  100ge11-2.core1.ash1.he.net (2001:470:0:299::1)  259.839 ms  97.863 ms  182.336 ms 
 9  deteque-llc.10gigabitethernet1-1-34.switch5.ash1.he.net (2001:470:1:603::2)  110.684 ms  109.898 ms  177.252 ms 
10  2606:700:ffff:1::

Maybe this is just me..same or close-enough to same path...
unless another person speaks up, probably this is just me.

-chris

[llynch@…]

Con -

Let me know who you want to own v6 this timeout

• lucy

[jim@…]

Chris, this feels to me like RF issues causing retransmits at the local L2. Are you still seeing the behavior?

-Jim

[llynch@…]

puch for email updates (changes in trac)

[morrowc@…]

At Sun, 16 Jul 2017 11:17:36 -0000,
"IETF Tickets/NOC" <tickets@meeting.ietf.org> wrote:
> 
> [1  <text/plain; utf-8 (base64)>]
> #1105: IPv6 sluggishness?
> ----------------------------+--------------------------------
>       Reporter:  morrowc@…  |                Owner:  con@…
>           Type:  defect     |               Status:  assigned
>       Priority:  tbd        |            Milestone:  ietf-99
>      Component:  network    |           Resolution:
>       Keywords:             |  My Current Location:
> My MAC  Address:            |                My OS:
> ----------------------------+--------------------------------
> 
> Comment (by jim@…):
> 
>  Chris, this feels to me like RF issues causing retransmits at the local
>  L2. Are you still seeing the behavior?

I believe in the NOC room I'm not seeing this, as much.
one in ~20 pings are ~1000ms... (10x latency change)

I am on the ssid: ietf-legacy99
if that matters.

[morrowc@…]

At Sun, 16 Jul 2017 08:25:45 -0400,
Chris Morrow <morrowc@ops-netman.net> wrote:
> 
> At Sun, 16 Jul 2017 11:17:36 -0000,
> "IETF Tickets/NOC" <tickets@meeting.ietf.org> wrote:
> > 
> > [1  <text/plain; utf-8 (base64)>]
> > #1105: IPv6 sluggishness?
> > ----------------------------+--------------------------------
> >       Reporter:  morrowc@…  |                Owner:  con@…
> >           Type:  defect     |               Status:  assigned
> >       Priority:  tbd        |            Milestone:  ietf-99
> >      Component:  network    |           Resolution:
> >       Keywords:             |  My Current Location:
> > My MAC  Address:            |                My OS:
> > ----------------------------+--------------------------------
> > 
> > Comment (by jim@…):
> > 
> >  Chris, this feels to me like RF issues causing retransmits at the local
> >  L2. Are you still seeing the behavior?
> 
> I believe in the NOC room I'm not seeing this, as much.
> one in ~20 pings are ~1000ms... (10x latency change)
> 
> I am on the ssid: ietf-legacy99
> if that matters.

I've been pinging/ping6ing - mailserver.ops-netman.net

which still is approximately ever 20 seconds v6 10x increase and no
similar latency change (at the same time) for v4.

[jim@…]

As per the conversation in the NOC, this problem exists from sources entirely outside the IETF network, hence "not our problem" ;-)

Thanks for your help debugging!

Closing with Chris's permission...

-Jim

[Rick Alfvin]

Milestone renamed