Re: [PATCH] IPv6: Fix Prefix Length of Link-local Addresses

From: Pekka Savola (pekkas@netcore.fi)
Date: Wed Oct 09 2002 - 12:16:39 EST


On Thu, 10 Oct 2002, YOSHIFUJI Hideaki / [iso-2022-jp] $B5HF#1QL@(B wrote:
> In article <20021009170018.H29133@edinburgh.cisco.com> (at Wed, 9 Oct 2002 17:00:18 +0100), Derek Fawcus <dfawcus@cisco.com> says:
>
> > All link local's are currently supposed to have those top bits
> > ('tween 10 and 64) zero'd, however any address within the link local
> > prefix _is_ on link / connected and should go to the interface.
> >
> > i.e. it's perfectly valid for me to assign a link local of fe80:1910::10
> > to an interface and expect it to be work, likewise for a packet
> > destined to any link local address to trigger ND.
>
> First of all, please don't use such addresses.
>
> By spec, auto-configured link-local address is fe80::/64
> and connected route should be /64.
>
> If you do really want to use such addresses (like fe80:1920::10),
> you can put another route by yourself, at your own risk.
>
> We should not configure in such way by default.
> and, we should even have to add "discard" route for them
> by default for safe.

Personally I think the interfaces should be configured with a /64 but
there should be a discard route for the whole /10.

-- 
Pekka Savola                 "Tell me of difficulties surmounted,
Netcore Oy                   not those you stumble over and fall"
Systems. Networks. Security.  -- Robert Jordan: A Crown of Swords

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