Re: LAN addresses in IPv6

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Robert Moskowitz wrote:

> Here is an example of an IPv6 addr:
> 
> ifconfig eth1
> eth1 Link encap:Ethernet HWaddr 00:1B:77:43:09:78
> inet addr:208.83.67.155 Bcast:208.83.67.159 Mask:255.255.255.248
> inet6 addr: 2607:f4b8:3:1:21b:77ff:fe43:978/64 Scope:Global
> inet6 addr: fe80::21b:77ff:fe43:978/64 Scope:Link

Thanks very much for your response,
which has added greatly to my enlightenment.

Unfortunately, I only have Scope:Link entries on my machines.
I don't see any mention of Scope:Global even on my server.

> I have real IPv6 connectivity through my ISP Clearrate that gets its 
> allocation from Verizon. I have a /48 allocation.
> 
> Does sixxs.net give you a prefix allocation and you run RADVD yourself 
> or do you get the router advertisements through the tunnel? The key is 
> to look for Scope:Global.

The information I got from sixxs was:
-------
  Tunnel Id          : T20165
  PoP Name           : iedub01 (ie.heanet [AS1213])
  Your Location      : Dun Laoghaire, ie
  SixXS IPv6         : 2001:770:100:134::1/64
  Your IPv6          : 2001:770:100:134::2/64
  SixXS IPv4         : 193.1.31.74
  Tunnel Type        : Static (Proto-41)
  Your IPv4          : 86.43.71.228
-------
On starting aiccu I got the message
-------
Starting AICCU (Automatic IPv6 Connectivity Configuration Utility) services: 
Tunnel Information for T20165:
POP Id      : iedub01
IPv6 Local  : 2001:770:100:134::2/64
IPv6 Remote : 2001:770:100:134::1/64
Tunnel Type : 6in4-static
Adminstate  : enabled
Userstate   : enabled
-------

>> it seems I have to wait until shorewall6 comes along for Centos,
>> which apparently needs a more recent kernel and iptables
>> than currently running under Centos, according to
>> <http://www.shorewall.net/IPv6Support.html>.

> Hold your breath. I am working with some FC9 and FC10 boxes to work with 
> shorewall6. My plan is to work out the resulting IP6tables and copy 
> those to Centos boxes. At least those rules that should work with the 
> Centos kernel.

Please let us (particularly me!) know of any progress along this line.

As will be apparent, I am more or less completely at sea with IPv6 -
I'm stumbling in the dark.
Basically, I would like a very simple document
(preferably not starting with 10 pages on the history of IPv6,
and a lecture on the size of 2^128)
which explains eg the roles of aiccu and radvd in terms of a home network
with a fixed IPv4 address,
and what is meant by Scope:Link and Scope:Global, etc.


-- 
Timothy Murphy  
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland


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