In article <[EMAIL PROTECTED]> (at Thu, 15 Nov 2007 10:11:16 -0800), "Templin, 
Fred L" <[EMAIL PROTECTED]> says:

> Yoshifuji, 
> 
> > -----Original Message-----
> > From: YOSHIFUJI Hideaki / 吉藤英明 [mailto:[EMAIL PROTECTED] 
> > Sent: Thursday, November 15, 2007 3:48 AM
> > To: Templin, Fred L
> > Cc: netdev@vger.kernel.org; [EMAIL PROTECTED]; 
> > [EMAIL PROTECTED]
> > Subject: Re: [PATCH 01/01] ipv6: RFC4214 Support (v2.2)
> > 
> > In article 
> > <[EMAIL PROTECTED]
> > eing.com> (at Wed, 14 Nov 2007 22:44:17 -0800), "Templin, 
> > Fred L" <[EMAIL PROTECTED]> says:
> > 
> > > From: Fred L. Templin <[EMAIL PROTECTED]>
> > > 
> > > This patch includes support for the Intra-Site Automatic Tunnel
> > > Addressing Protocol (ISATAP) per RFC4214. It uses the SIT
> > > module, and is configured using extensions to the "iproute2"
> > > utility.
> > > 
> > > The following diffs are specific to the Linux 2.6.24-rc2 kernel
> > > distribution. This message includes the full and patchable 
> > diff text;
> > > please use this version to apply patches.
> > > 
> > > Signed-off-by: Fred L. Templin <[EMAIL PROTECTED]>
> > 
> > BTW, how will we handle DNS name (and TTL) and/or multiple PRL entries 
> > in RFC4214?
> > 
> > I'm doubting if we really need to handle PRL refresh in kernel.
> 
> DNS name and PRL refresh are done in a daemon that either exec's
> 'ip' or issues the device ioctl's directly. When there are multiple default
> router IPv4 addresses, the daemon picks one as the primary and writes
> it to the kernel. It can then change to a different primary later if it wants
> to. Also possible is something like VRRP to allow several routers for
> fault tolerance even though there is only a single default router address. 

Why?  All PRLs should be installed in kernel so that standard router 
selection can be used.  For this, I think we should have just one
isatap interface per set of PRLs provideing virtual link,
especially if each of them provides the same prefix.

--yoshfuji
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