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Date:      Tue, 07 Mar 2000 13:30:01 +0100
From:      "Jose M. Alcaide" <jose@we.lc.ehu.es>
To:        Yoshinobu Inoue <shin@nd.net.fujitsu.co.jp>
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: IPv6: can a link-site (or global) address be configured inrc.conf?
Message-ID:  <38C4F649.501C98CA@we.lc.ehu.es>
References:  <38C3C9A6.28E3A38@we.lc.ehu.es> <20000307102149S.shin@nd.net.fujitsu.co.jp>

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Yoshinobu Inoue wrote:
> 
> There seems to be already another answers and I might be
> missing a point, but you might mean you want to assigne an
> address with simple number in its lower 8byte?
> 
> Such as,
>     3ffe:501:100e:2000::1
> or
>     3ffe:501:100e:2000::2
> 
> not like
>     3ffe:501:100e:2000:200:eff:fe74:41d2
> ?
> 
> In that case, yes, you need to do ifconfig to assign former
> kind of address. They are relatively easy to memorize and
> useful as server addr.  But you don't necessarily need to
> manually assign it.  You can use existing
> 
>  ifconfig_ifname=
> 
> and
> 
>  ifconfig_ifname_aliasnum=
> 
> also for IPv6.
> (But there is no example for IPv6. I'll add examles.)
> 
> E.g. if you want to assign
>  3ffe:501:100e:2000::1 and 3ffe:501:100e:2000::2
> to ed0, I think following configuration works.
> 
> ifconfig_ed0_alias0="inet6 3ffe:501:100e:2000::1 prefixlen 64"
> ifconfig_ed0_alias1="inet6 3ffe:501:100e:2000::2 prefixlen 64"
> 
> (By the way, this is local addr here, and please not use
> exactly same prefix at another place. :-)
> 

Yes, I am using site-local addresses like "fec0::9ee3:6b4", where I
am coding the IPv4 address in the lower 32 bits, and I am using
a prefixlen=120.

Just wondering: is the "alias" necessary? I can add a site-local IPv6
address to the same interface without the "alias" ifconfig keyword. If this
is valid, then something as

ifconfig_fxp0="inet 158.227.6.180 netmask 255.255.255.0 inet6 fec0::9ee3:6b4 prefixlen 120"

should be OK.

-- JMA
-----------------------------------------------------------------------
José Mª Alcaide                         | mailto:jose@we.lc.ehu.es
Universidad del País Vasco              | mailto:jmas@FreeBSD.org
Dpto. de Electricidad y Electrónica     | http://www.we.lc.ehu.es/~jose
Facultad de Ciencias - Campus de Lejona | Tel.:  +34-946012479
48940 Lejona (Vizcaya) - SPAIN          | Fax:   +34-946013071
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 "Beware of Programmers who carry screwdrivers"  --  Leonard Brandwein


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