Mailing List Archive: NANOG: users

HE Fremont IPv6 tunnel

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jeroen at mompl

Jul 22, 2012, 12:40 AM

Post #1 of 4 (237 views)
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HE Fremont IPv6 tunnel

Recently I migrated the server that's running an HE IPv6 tunnel to one
of the Fremont endpoints and now the tunnel is going down for a few
minutes every couple of hours or so. I haven't been able yet to find a
reason for this. I made sure the old server is not running any IPv6
related things anymore (such as radvd).

I am curious if anyone knows if the Fremont endpoints are experiencing
some problems? I have barely ever noticed any problems with the IPv6
tunnels so I am pretty sure it's not on HE's side, but I wanted to make
sure.

Thanks,
Jeroen

--
Earthquake Magnitude: 4.6
Date: Sunday, July 22, 2012 06:32:50 UTC
Location: Santa Cruz Islands region
Latitude: -10.6712; Longitude: 164.7985
Depth: 37.00 km

rmosher at he

Jul 22, 2012, 12:53 AM

Post #2 of 4 (216 views)
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Re: HE Fremont IPv6 tunnel [In reply to]

Perhaps you should try contacting HE support. I hear they're responsive.

--
Rob Mosher
Senior Network and Software Engineer
Hurricane Electric / AS6939

On 7/22/2012 3:40 AM, Jeroen van Aart wrote:
>
>
> I am curious if anyone knows if the Fremont endpoints are experiencing
> some problems? I have barely ever noticed any problems with the IPv6
> tunnels so I am pretty sure it's not on HE's side, but I wanted to
> make sure.

jeroen at mompl

Jul 22, 2012, 8:44 PM

Post #3 of 4 (207 views)
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Re: HE Fremont IPv6 tunnel [In reply to]

Rob Mosher wrote:
> Perhaps you should try contacting HE support. I hear they're responsive.

I understand however I was pretty sure it wasn't the tunnel that was the
problem. So I didn't feel emailing HE was appropriate.

I am curious, since I have pretty much confirmed the problem is on my
side, why would a move of an IPv6 tunnel from one server to another
suddenly cause intermittent outages of a few minutes every couple of
hours. It's not as regular so as to suspect a cronjob or something.

The old server is still online, however the radvd daemon isn't running
there anymore and its external interface has been disabled. There is no
IPv6 dhcp server running either.

The new server basically has the configuration and IP addresses the old
one used to have. It's running radvd. Is there some (obvious) residual
effect of having moved an IPv6 tunnel from one physical server to
another that I fail to recognise?

I have moved ethernet interfaces and cables on the new server to rule
out a fault in those. Its internal interface (on the same ethernet card)
appears very stable.

Thanks,
Jeroen

--
Earthquake Magnitude: 5.2
Date: Monday, July 23, 2012 00:22:05 UTC
Location: near the north coast of Papua, Indonesia
Latitude: -2.5213; Longitude: 135.3425
Depth: 10.40 km

jeroen at mompl

Jul 23, 2012, 12:33 AM

Post #4 of 4 (204 views)
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Re: HE Fremont IPv6 tunnel [In reply to]

Jeroen van Aart wrote:
> I am curious, since I have pretty much confirmed the problem is on my
> side, why would a move of an IPv6 tunnel from one server to another

A helpful person pointed me in the right direction. Multiple times I
checked the /etc/network/interfaces file and didn't spot it. But I had
forgotten to remove the gateway for the internal interface... after
switching IPs and enabling the external interface.

Stupid mistake, and obviously it sort of works, but not well.

Thanks,
Jeroen

--
Earthquake Magnitude: 5.1
Date: Monday, July 23, 2012 06:54:24 UTC
Location: Near Islands, Aleutian Islands, Alaska
Latitude: 51.4620; Longitude: 171.7920
Depth: 33.00 km

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