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Can I setup an subnet just with the tunnel ... /64 prefix?
![[at]](/s/countries/at.gif) Shadow Hawkins on Wednesday, 13 April 2011 21:30:38
Hello,
May be it is just a silly question:
I just got granted a tunnel.
As my plan is to set up a local ip6 network, I'm do not really having the patience to wait for a subnet:
Can I set up a local network just with my tunnel 2001:15c0:65ff:5c0::1/64 prefix?
From googling around, The answer seems no, however I do not understand why in detail.
First:
I tried to set up a radvd-definition on the router (=tunnel end point) to announce the prefix (and enabled ip6 forwarding). This worked, all clients got a correct prefix and clients could ping each other with this prefix.
However I was not able to ping the router. This I do not understand. The default route was to the router, so why was it not able to answer to pings?
Second:
OK, one reason could have been that the router just forward everything back to the tunnel, so I manipulated the ip 6 routes to prefer the local network interface (eth0).
2001:15c0:65ff:5c0::1 dev sixxs metric 64 mtu 1280 advmss 1220 hoplimit 0
2001:15c0:65ff:5c0::/64 dev eth0 metric 120 mtu 1500 advmss 1440 hoplimit 0
fe80::/64 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit 0
fe80::/64 via :: dev sixxs proto kernel metric 256 mtu 1280 advmss 1220 hoplimit 0
default via 2001:15c0:65ff:5c0::1 dev sixxs metric 1024 mtu 1280 advmss 1220 hoplimit 0
but still no pings.
OK, I accept that I have to wait for a subnet grant, however help me to understand, why this does not work.
Michael
Can I setup an subnet just with the tunnel ... /64 prefix?
Can I set up a local network just with my tunnel 2001:15c0:65ff:5c0::1/64 prefix?
No, as in that /64 only ::1 (PoP) and ::2 (your endpoint) are active. Request a subnet if you want to route a prefix behind it.
Can I setup an subnet just with the tunnel ... /64 prefix?
![[be]](/s/countries/be.gif) Shadow Hawkins on Monday, 19 September 2011 13:34:59
I guess that this last answer also applies with the situation like mine ? I hope it doesn't, but "fear" it does...
I have a (heartbeat) tunnel and a subnet working nicely IPv6-connecting my home network to IPv6 (and IPv4) internet. But then, my intention is to add IPv6 connectivity to a laptop of mine from anywhere over the internet to my home network. So my intention is to request another tunnel (an AYIYA tunnel in that case).
However, requesting a new and other /48 subnet to have that tunnel routed seems like such a waste of address space. So could I then have e.g. one of my own /48 subnets routed to that still-to-be-requested AYIYA tunnel ? Because 65536 /64 subnets is plenty to chose from for that given purpose, not so ? I could spare 1. And then yet again : from those 2 ^ 64 possible hosts in that one subnet, I'd need ... 1 single...
Can I setup an subnet just with the tunnel ... /64 prefix?
Thus your current setup is:
{Internet} -> {PoP} -> {HomeRouter (tunnel /64) } -> {HomeNetwork (subnet /48) }
And you want to add:
{Laptop} -> {Internet}
As such, you only need a tunnel from my POV? And that is only a /64... (and the tunnel address space on each PoP allows for 32k tunnels per PoP, thus really there is enough of that :)
Can I setup an subnet just with the tunnel ... /64 prefix?
Shadow Hawkins on Monday, 19 September 2011 14:43:46
Jeroen,
If I understood your answer correctly, this would mean that I'd have some <tunnel prefix>::2 IPv6 address, and use just that one to connect to my home network ? If that'd work, that would indeed be pretty well for me.
But one the other hand, having had some of my /48 subnet's IPv6 address would've been kind of ... let me call it ... "neater" ?
Can I setup an subnet just with the tunnel ... /64 prefix?
If that'd work, that would indeed be pretty well for me.
That works quite fine.
But one the other hand, having had some of my /48 subnet's IPv6 address would've been kind of ... let me call it ... "neater" ?
Then you would need to build your own private tunnel between those locations, and also take care of all the traffic being routed always over your home network.
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on Monday, 02 May 2011 16:51:16
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