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

From: Yuji Sekiya (sekiya@sfc.wide.ad.jp)
Date: Wed Oct 09 2002 - 16:46:16 EST


At Wed, 9 Oct 2002 17:00:18 +0100,
Derek Fawcus <dfawcus@cisco.com> wrote:

> Without reading the kernel routing table code a bit more, I'm not certain
> what that change does, but it looks as if it might be changing the
> connected route for a link local from fe80::/10 to fe80::/64.

Why do you want to use /10 prefix for link-local address ?
RFC2373 defines link-local address format as below.

   | 10 |
   | bits | 54 bits | 64 bits |
   +----------+-------------------------+----------------------------+
   |1111111010| 0 | interface ID |
   +----------+-------------------------+----------------------------+

> 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.

If you wan to use /10 prefix for link-local address, you can add the
link-local address with /10 prefix to interfaces and routing table
manually at your own risk, but it should not be a default behavior.

-- Yuji Sekiya
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Tue Oct 15 2002 - 22:00:33 EST