From: AllaboutCisco (frenzeus@streamyx.com)
Date: Sat Sep 16 2006 - 02:01:34 ART
Hi Scott,
Thanks a lot. Excellent piece of info u've got there.. thanks for clearing
up.
Cheers,
K
----- Original Message -----
From: "Scott Morris" <swm@emanon.com>
To: "'Victor Cappuccio'" <cvictor@protokolgroup.com>; "'AllaboutCisco'"
<frenzeus@streamyx.com>; "'srdja blagojevic'" <srdja1@pexim.co.yu>;
<ccielab@groupstudy.com>
Cc: "'Chee Chew Leong'" <cleong3@csc.com>
Sent: Saturday, September 16, 2006 9:55 AM
Subject: 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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