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Author Topic: Advise on subnet  (Read 4434 times)

mtepaske

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Advise on subnet
« on: October 01, 2008, 09:21:42 AM »

Hi,

I recently got myself a tunnel through he.net, and I just got it to work on a Linksys router running openwrt (kamikaze build 7.09). My outside interface is called 'eth0.1', which has a public IP address. My lan interface is called br-lan and I decided to call my tunnel interface 'he-ipv6'. As opposed to sixxs (which I believe uses /128's for both tunnelendpoints) he.net uses a /64. I'd like to use this subnet on my internal lan, as it seems ridicule to me to request another /48 (I only use IPv6 on two laptops).

So, my tunnel interface has 2001:470:xxxx:xxx::2/64, and I decided to give my lan interface 2001:470:xxxx:xxx::3/64. This seems to work, but now my tunnel interface is not accessible anymore. Even though that's not a big deal for me, I am in doubt whether this is the way to go.

So what do you guys think? Can I just configure radvd to distribute addresses 2001:470:xxxx:xxx::/64 on my lan, or should I request a seperate /48 after all?

Thanks in advance for your responses!


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broquea

  • Sr. Network Engineer, HE.NET AS6939
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Re: Advise on subnet
« Reply #1 on: October 01, 2008, 09:49:16 AM »

You should use the routed /64 we auto-allocate to you for your LAN. You can then use something like RADVD to let your hosts on the LAN autconfigure themselves.
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mtepaske

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Re: Advise on subnet
« Reply #2 on: October 01, 2008, 11:03:47 AM »

Thanks for your reply.

It still didn't fix it for me, until a friend of mine notified me of the subtle difference between the /64 used for the tunnel endpoints and the /64 for my lan. I was under the impression that it was the same /64.

It is working now, so I can configure radvd and reverse dns. Thanks again for your quick response!
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