problem with v6 in TWC network

[Paul_Ebersman@…]

In the Tapa tower on wireless, v4 works flawlessly, v6 having lots of drops 4 hops along.
I’m on ietf-hotel, channel 11.

Traceroute here.

dhcp-88e6.meeting.ietf.org (::)                        Sun Nov  9 07:05:06 2014
Keys:  Help   Display mode   Restart statistics   Order of fields   quit
                                       Packets               Pings
 Host                                Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. 2001:67c:370:136::2               0.0%     4    4.8   5.2   2.8   9.7   3.1
 2. 2605:e000:0:8::f:52               0.0%     4    5.5   4.5   3.7   5.5   0.7
 3. 2605:e000:0:4::f:241              0.0%     4    5.5  14.4   3.2  45.6  20.8
 4. 2605:e000:0:4::b:32              50.0%     4    5.4   5.3   5.2   5.4   0.1
 5. 2605:e000:0:4::50                50.0%     4   54.0  53.0  51.9  54.0   1.5
 6. 2001:1998:0:8::80                33.3%     4   58.3  56.2  54.1  58.3   3.0
 7. 2001:1998:0:4::e0                 0.0%     3   62.9  63.2  62.4  64.3   1.0
 8. 2001:1998::66:109:6:143           0.0%     3   60.8  68.1  60.7  82.7  12.7
 9. 2001:4f8:0:1::8:1                 0.0%     3  101.5  74.5  60.9 101.5  23.3
10. 2001:4f8:1b:1::8:2                0.0%     3   63.0  65.0  63.0  66.2   1.8
11. 2001:4f8:3:36::235                0.0%     3   61.3  61.7  61.0  62.9   1.

I’m getting 30-60% packet loss pretty consistently at hop 4 (2605:e000:0:4::b:32).

I can switch to v4 to ssh to my server but lots of sites like ietf.org do have AAAA
and it would be nice to not be testing lots of lousy happy eyeball implementations. ;)

Not sure if this in IETF network or into TWC proper.

Thanks!

--
Paul Ebersman
paul_ebersman@cable.comcast.com

[cdoyle@…]

We are noticing the same thing for traffic transiting the TWC network over routers with 2605:e000: hextets. We've reached out to TWC and are working on alternative v6 routing strategies to mitigate the issue in the meantime.

[jim@…]

Paul,

We're continuing to work with TWC on this. Sorry this is dragging out so long....

• Jim

[jim@…]

Paul,

Could you test again? We believe we've identified the issue with TWC and resolved it.

Thanks!

• JIm

[cdoyle@…]

Replying to jim@…:

Paul,

Could you test again? We believe we've identified the issue with TWC and resolved it.

Thanks!

• JIm

Turns out that the ticketing system is handling replies different now then it was before. So sorry for the radio silence. Please click the link to check the ticket directly to see the current notes.

[jim@…]

Paul,

We strongly believe this is resolved, so I'm going to resolve the ticket. If you find that not to be the case, please let us know and we'll be happy to work to address anything outstanding.

• JIm

[Paul_Ebersman@…]

As of yesterday morning, I was still seeing some drops but it was usable for SSH.

By this morning, it’s effectively error free.

Great job as always. Thanks!

--
Paul Ebersman
paul_ebersman@cable.comcast.com





On 11Nov, 2014, at 1:15 PM, IETF Meeting/NOC <tickets@meeting.ietf.org> wrote:

> #863: problem with v6 in TWC network
> ----------------------------------+--------------------------------
>      Reporter:  Paul_Ebersman@…  |                Owner:  cdoyle@…
>          Type:  request          |               Status:  closed
>      Priority:  tbd              |            Milestone:  ietf-91
>     Component:  incoming         |           Resolution:  fixed
>      Keywords:                   |  My Current Location:
> My MAC  Address:                  |                My OS:
> ----------------------------------+--------------------------------
> Changes (by jim@…):
> 
> * status:  assigned => closed
> * resolution:   => fixed
> 
> 
> Comment:
> 
> Paul,
>     We strongly believe this is resolved, so I'm going to resolve the
> ticket. If you find that not to be the case, please let us know and we'll
> be happy to work to address anything outstanding.
> 
>     - JIm
> 
> --
> Ticket URL: <https://tickets.meeting.ietf.org/ticket/863#comment:7>
> IETF Meeting/NOC <https://tickets.meeting.ietf.org>
> IETF Meeting - NOC pages

[jim@…]

Paul,

Many thanks! Re-Resolving.

• Jim

[Rick Alfvin]

Milestone renamed