Slow IPv6 Performance - Information Gathering Thread

Forums › 2degrees (including Slingshot, Orcon, Flip, Stuff Fibre, MyRepublic, 2talk and Vocus) › Slow IPv6 Performance - Information Gathering Thread

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meow
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#1995115 13-Apr-2018 00:17

Just thought I'd add something - I just fixed my IPv6 tonight (forgot to save my switch VLAN configuration and had a power cut recently) and have been testing this via my IPv6 testing SSID, on wireless to my Chromebook along with my standard network SSID which currently has IPv6 disabled.

IPv6:

IPv4:

This is not at all scientific - heck I am testing this over WiFi on a Core M3 powered Chromebook but interesting that upload is not really affected.

Also, from what I have heard from people who work for 2degrees in their broadband and datacentre side it is still pretty-much Snap internally, and still based in Christchurch.

Also pinging @NickMack who may know something.

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NickMack

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#1995200 13-Apr-2018 09:29

michaelmurfy:

Just thought I'd add something - I just fixed my IPv6 tonight (forgot to save my switch VLAN configuration and had a power cut recently) and have been testing this via my IPv6 testing SSID, on wireless to my Chromebook along with my standard network SSID which currently has IPv6 disabled.

IPv6:

IPv4:

This is not at all scientific - heck I am testing this over WiFi on a Core M3 powered Chromebook but interesting that upload is not really affected.

Also, from what I have heard from people who work for 2degrees in their broadband and datacentre side it is still pretty-much Snap internally, and still based in Christchurch.

Also pinging @NickMack who may know something.

Hi All - Just spoken to the team, we think we have found an issue which we are investigating, I'll update you later on today.

Nick.

https://nick.mackechnie.co.nz | NZ ISP latency monitoring - https://smokeping.thenet.gen.nz

Threarah

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#1995239 13-Apr-2018 10:04

OmniouS:
Threarah: Some info from someone on 2degrees that isn't effected:

That's interesting - can you please share a traceroute to that URL? Here's mine:

Sure:

tracert 12244.wpc.azureedge.net

Tracing route to cs10.wpc.v0cdn.net [2606:2800:147:ff8:129b:22eb:20b:1347]

over a maximum of 30 hops:

1 1 ms 1 ms 1 ms 2406:e000:xxxx::1

2 3 ms 3 ms 3 ms 2406:e000:200:8::1

3 19 ms 19 ms 19 ms as23655.auckland.megaport.com [2001:dea:0:40::10]

4 20 ms 22 ms 20 ms as15133.auckland.megaport.com [2001:dea:0:40::30]

5 20 ms 20 ms 20 ms 2606:2800:147:ff8:129b:22eb:20b:1347

Trace complete.

NickMack

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#1995373 13-Apr-2018 11:58

Hi All,

Testing has pointed us to the likely suspect - an issue has been identified with a change in behavior post a Junos upgrade on our core PE's - Change is currently in QA with the change scheduled to be rolled out today.

Nick.

https://nick.mackechnie.co.nz | NZ ISP latency monitoring - https://smokeping.thenet.gen.nz

NickMack

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#1995449 13-Apr-2018 12:55

Change committed

https://nick.mackechnie.co.nz | NZ ISP latency monitoring - https://smokeping.thenet.gen.nz

michaelmurfy

meow
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#1995481 13-Apr-2018 13:27

@NickMack thanks very much! I do owe you beers next time I see you.

Seems resolved here:

(Same test, over WiFi, on my Chromebook - don't judge me!)

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OmniouS

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#1995482 13-Apr-2018 13:29

Awesome - thanks very much @NickMack

Looking forward to testing this when I get home!

Cheers

Noodles

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#1995614 13-Apr-2018 16:38

@NickMack thanks! Much better now.

DumKopf

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#1995615 13-Apr-2018 16:38

Initial testing looks good!

gfycat.com streaming well. My urls I was having issues with, now downloading at full speed.

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#1995688 13-Apr-2018 18:42

Everything is looking good now!

DumKopf

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#1995768 13-Apr-2018 22:18

Can we get some more information about this issue..

When did it start (feels like it was like Nov/Dec last year)? What was it isolated to?

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#1996239 15-Apr-2018 00:05

NickMack: ... - an issue has been identified with a change in behavior post a Junos upgrade on our core PE's - ...

DumKopf: Can we get some more information about this issue ...

Sounds like the vendor made a change to the default beaviour.

BTW, fix works for me too.

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ripdog

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#1996243 15-Apr-2018 01:15

Oh wow, I can use gfycat again. It's been months! And streamable!

I love you so much NickMack. I complained about this issue months ago, and after several reminders I was told that it went to the network team and they found nothing.

I guess that was a lie.

Anyway, thanks for the fix, late though it is.

DumKopf

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#1996342 15-Apr-2018 10:15

ripdog:

Oh wow, I can use gfycat again. It's been months! And streamable!

I love you so much NickMack. I complained about this issue months ago, and after several reminders I was told that it went to the network team and they found nothing.

I guess that was a lie.

Anyway, thanks for the fix, late though it is.

That's why I'd like a bit more transparency here. Seems like a long term issue that affected quite a few people.

NickMack

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#1996367 15-Apr-2018 11:02

Hiya,

The issue affected some customers on ipv6 - based on the PE they were hitting and the revision of code they were hitting (We have a heap, and upgrading them takes time :-)). It has been escalated a few times from Care into one of my teams for investigation. Sometimes the description of a fault can lead you to troubleshoot in the 'wrong' area, this would be an example of this. We looked at the Queuing/QOS profiles for ipv6 traffic on old/new code and noticed a change in behaviour in some filters, which helped us isolate and resolve. Troubleshooting these issues sometimes takes time to Lab, reproduce and address/resolve.

Nick.

https://nick.mackechnie.co.nz | NZ ISP latency monitoring - https://smokeping.thenet.gen.nz

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