From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Fri Sep 15 2006 - 22:35:20 ART
Hi All_About et all,
I could be completely wrong here but while RFC Reference you are showing us,
was nice to read, I think of that FC00/7 with the Universal/Local (U/L)
modification part, is for Pseudo-Random Global ID automatic IPV6 global ID.
Now doing another browse, I found this
http://tools.ietf.org/html/draft-hinden-ipv6-global-local-addr-00
Is almost the same document as the RFC you pointed out.
Now for the Structure part of the IPV6 Addressing shown in that Draft Link
| n |
| bits | m bits | 16 bits | 64 bits |
+--------+------------+-----------+-----------------------------+
| prefix | global ID | subnet ID | interface ID |
+--------+------------+-----------+-----------------------------+
The one you purpose for *me* is not right "FDA1:B2C3:D4E5:5::5/64"
So I think here that the correct IPV6 here Global ID is
Int lo0
Ipv6 add FC00:A1B2:C3D4:E5::/64 eui-64
Again I could be completely off here, so do not take my opinion as correct
Thanks
Victor.-
-----Mensaje original-----
De: nobody@groupstudy.com [mailto:nobody@groupstudy.com] En nombre de
AllaboutCisco
Enviado el: Viernes, 15 de Septiembre de 2006 08:09 p.m.
Para: srdja blagojevic; ccielab@groupstudy.com
CC: 'Chee Chew Leong'
Asunto: IPv6 Global ID - is this right?
Interesting bit.. after having read thru on Global ID, would this be the
correct way of addressing it given the 40-bit global ID A1B2C3D4E5:
FDA1:B2C3:D4E5:5::5/64
Prefix: FC00/7 with L-bit = 1, therefore we get FD
--According to RFC4193--
Concatenate FC00::/7, the L bit set to 1, and the 40-bit Global ID to create
a Local IPv6 address prefix.
Then the rest of the 40-bit (A1B2C3D4E5) is concatenated, leaving now 16-bit
for our SubnetID ("5" was randomly chosen, maybe picked off from R5?) and
finally 64-bit for interfaceID.
Appreciate any feedback on this one..
Thanks.
Cheers,
K
----- Original Message -----
From: "srdja blagojevic" <srdja1@pexim.co.yu>
To: "'Chee Chew Leong'" <cleong3@csc.com>; <ccielab@groupstudy.com>
Sent: Wednesday, September 13, 2006 5:10 PM
Subject: RE: ipv6 addressing
> Chee,
>
> I think that this is what you are looking for (general ID <=>
> general-prefix):
>
>
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/ipv6
> _c/v6addres.htm#wp1132473
>
>
> hth,
> Srdja
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Chee
> Chew Leong
> Sent: Monday, September 11, 2006 09:19
> To: ccielab@groupstudy.com
> Subject: ipv6 addressing
>
> The question said
>
> Each router should have a Unique-Local address assigned to a loopback
> interface. Your global ID is A1B2C3D4E5.
>
> I have search a round what is the meaning of the global ID and how is it
> relates to unique-local address.
>
> How to interprete this?
>
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