From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Fri Sep 15 2006 - 22:58:09 ART
Yes Scott, Thank you very much for the clarification!
Gracias
Victor.-
-----Mensaje original-----
De: Scott Morris [mailto:swm@emanon.com]
Enviado el: Viernes, 15 de Septiembre de 2006 09:55 p.m.
Para: 'Victor Cappuccio'; 'AllaboutCisco'; 'srdja blagojevic';
ccielab@groupstudy.com
CC: 'Chee Chew Leong'
Asunto: RE: IPv6 Global ID - is this right?
The "00" you have inserted would make it wrong there.. You have an extra
bit not needed.
7 bits are specified (giving FC), 1 bit is the L-bit (giving FC or FD).
The next 40 bits are the unique ID. This gets you to 48 bits total.
The next 16 bits are for your own subnet choice. This brings you to 64
bits total.
The next 64 bits are your host address. EUI-64, or manually assigned.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPExpert VP - Curriculum Development
IPExpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Victor Cappuccio
Sent: Friday, September 15, 2006 9:35 PM
To: 'AllaboutCisco'; 'srdja blagojevic'; ccielab@groupstudy.com
Cc: 'Chee Chew Leong'
Subject: RE: IPv6 Global ID - is this right?
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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>
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