[MrVM] NC Possible IPv6 issues?

Mason · 2018-09-26 18:05:43

Anyone else experiencing issues over IPv6 on the Lenoir, NC MrVM node?

Able to ssh in via the allocated IPv4 port, but nothing over v6. Once in to the VM, there's no IPv6 connectivity out either (Destination unreachable: No route). I've got two VMs with this same issue. Recently reinstalled Deb 9, so not sure if it's just the template or something else going on.

Cheers!
-Mason

mikho · 2018-09-26 19:18:33

I’ll have a check either within the hour or first thing tomorrow.
Haven’t heard from anyone else but there was a mention from the dc that they was changinga router or something.

I need to find that info email and check connectivity.
Not the first time a router change causes ipv6 issues. (Last time was not Lenoir).

mikho · 2018-09-27 06:38:54

could you try now?

It works from my test server

--> adding .-.. forgot to press submit yesterday.. dammit

Mason · 2018-09-27 12:19:00

Still no dice for me. Even tried reinstalling a different OS (Ubuntu 16.04).

No IPv6 connectivity within the VM --

# ping6 ipv6.google.com
PING ipv6.google.com(yx-in-x65.1e100.net) 56 data bytes
From yx-in-x65.1e100.net icmp_seq=3 Destination unreachable: Address unreachable
From yx-in-x65.1e100.net icmp_seq=4 Destination unreachable: Address unreachable
From yx-in-x65.1e100.net icmp_seq=5 Destination unreachable: Address unreachable

mtr looks like it's reaching the node, but not being routed to the VM --

                                                           Packets               Pings
 Host                                                    Loss%   Snt   Last   Avg  Best  Wrst StDev
...
...(omitted)...
...
10. dct-cr01-v-51.dacentec.com                            0.0%   195   37.2  37.1  35.6  48.0   2.1
11. 2607:5600::c7ff:9c81                                  0.0%   195   51.1  49.7  35.7  74.8   7.0
12. 2607:5600::c0ff:9f15                                  0.5%   195   36.4  36.9  35.6 107.2   6.1
13. 2607:5600::175c:dc9a                                  0.0%   195   36.2  36.5  35.9  61.9   1.9
14. ???

Last edited by Mason (2018-09-27 12:20:03)

mikho · 2018-09-28 07:00:04

I guess you can ping6 2607:5600:008e:0000::1 ?

That is the gateway and I can ping that from node/container but nothing beyound that.
I've opened a ticket with Dacentec about this.

mikho · 2018-09-28 18:17:18

This is a starnge issue, either I can ping from one/two containers or the node itself.

Looking into the configuration as this is the only node (out of 3) in Lenoir having this issue.

Mason · 2018-09-30 22:17:43

Negative on the ping6 to 2607:5600:008e:0000::1, still getting "Destination unreachable: no route".

Let me know if you'd like me to test again.

mikho · 2018-10-01 06:52:41

First of all, let me say I'm sorry but I never got around to look at it this weekend....

And second, this is kinda awkward.
Somehow there were two identical default routes with the same metric. One using the gateway as next hop, one leading nowhere.

I've ping6 ipv6.google.com from the node and a container now.

COuld you please confirm.

Mason · 2018-10-01 11:29:25

No worries, mikho!

All is good now. Able to ping ipv6.google.com and can SSH in over v6

Thanks for the taking a look into this!

WSS · 2018-10-03 03:51:27

lol dacentec. Guess LES is one way to use some of their garbage hardware.

FWIW, the Opteron garbage machines play nicely with Debian 9. I briefly thought of using one of the 5150 Xeons w/ the 60G SSD for boot and 2x500 for similar OVZ LE* services, but the last thing I want to do is more work.

Mason · 2018-10-03 12:04:48

WSS wrote:

...but the last thing I want to do is more work.

Guess you're not up to the same masochist caliber as mikho and company

mikho · 2018-10-03 12:11:28

I will probably upgrade the ram on the NC location, starting to swap and it is increasing the load.

LowEndSpirit Forum

#1 2018-09-26 18:05:43

[MrVM] NC Possible IPv6 issues?

#2 2018-09-26 19:18:33

Re: [MrVM] NC Possible IPv6 issues?

#3 2018-09-27 06:38:54

Re: [MrVM] NC Possible IPv6 issues?

#4 2018-09-27 12:19:00

Re: [MrVM] NC Possible IPv6 issues?

#5 2018-09-28 07:00:04

Re: [MrVM] NC Possible IPv6 issues?

#6 2018-09-28 18:17:18

Re: [MrVM] NC Possible IPv6 issues?

#7 2018-09-30 22:17:43

Re: [MrVM] NC Possible IPv6 issues?

#8 2018-10-01 06:52:41

Re: [MrVM] NC Possible IPv6 issues?

#9 2018-10-01 11:29:25

Re: [MrVM] NC Possible IPv6 issues?

#10 2018-10-03 03:51:27

Re: [MrVM] NC Possible IPv6 issues?

#11 2018-10-03 12:04:48

Re: [MrVM] NC Possible IPv6 issues?

#12 2018-10-03 12:11:28

Re: [MrVM] NC Possible IPv6 issues?

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