From: mmmmmmmmmmmm mmmmmmmmmmmm (now_on_the_dark_side@hotmail.co.uk)
Date: Mon Mar 12 2007 - 07:14:48 ART
Hi, All
I feel it's best practise to use your own link-local addresses for fram maps
for another reason also.
The link-local addresses that are generated include the mac address on one
of your interfaces in the host portion. If you configure a fram map using
this your config won't work on other equipment.
As most labs these days are zipped up and marked by another theatre your
configs will most likely be on differnt kit when they are marked.
HTH
C
>From: "Lab Dude" <ccielabdude@gmail.co
>Reply-To: "Lab Dude" <ccielabdude@gmail.com>
>To: "anthony.sequeira@thomson.com" <anthony.sequeira@thomson.com>
>CC: ccielab@groupstudy.com
>Subject: Re: IPv6 Link local addressing and FR maps
>Date: Sun, 11 Mar 2007 12:57:36 +0000
>
>Hi Anthony
>Thanks for the response. It makes it clear. Appreciate your help.
>
>Some questions for you regarding FR maps:
>
>1. According to (4) below, it is my understanding that we need link-local
>maps for routing protocols. Would we need to have maps only for remote
>link-local address on FR? Or would we need to have FR maps for both
>'link-local' AND 'global' IPv6 addresses in the event that we are running
>OSPFover FR? How about a scenario when we have RIP running over FR?
>
>Basically, what I am trying to get to is, when do we need global IPv6
>address FR maps and when do we need link-local FR maps, and when do we need
>both link-local and global IPv6 address FR maps.
>
>2. Consider a following scenario, where we need to have IPv6 as follows:
>
>BB1-R1-R2-R5
>
>R1 and R2 are connected over FR. R1 is point-to-point sub, and R2 is main
>interface with FR enabled. R2-R5 is a Ethernet broadcast segment. R1 is
>connected to BB2 over Ethernet. All these links need to have IPv6 enabled
>on
>them. We have been given Global IPv6 addresses for all.
>
>a. Do I need to configure both Link local and Global FR maps on R2?
>
>b. When I configure FR maps using neighbors IPv6 Global address, OSPF
>adjacency does come up. So why do I need to have link-local map on R2?
>
>Thanks for your help.
>
>Lab Dude
>On 3/10/07, anthony.sequeira@thomson.com <anthony.sequeira@thomson.com>
>wrote:
>
> > Hey - Lab Dude - great name!
> >
> >
> > 1. When you enable IPv6 on an interface - using the ipv6 enable command
> > or the ipv6 address command - you immediately get a link local address
> > there! IPv6 requires it and uses it for a variety of purposes. Lots of
> > candidates like to manually configure an IPv6 link-local address
> > replacing the difficult to remember one that gets created by default.
> > They do this so it is easier to reference it in later configurations -
> > such as frame maps!
> >
> > 2. You always have a link local address - it is required. Check this by
> > configuring a global address and the run show ipv6 address.
> >
> > 3. Routing protocols use the link local address - so your maps need to
> > reference the link local address. This is an example of when students
> > like to override the link local address with one that is easy to
> > remember.
> >
> > 4. The routing protocols use link local as next hop - this necessitates
> > the link local frame maps.
> >
> > I think you should start with this set of documents in your studies -
> > especially considering you will have access in the lab:
> >
> > http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/hi
> > pv6_c/index.htm
> >
> > The Brians at InternetworkExpert recommended this book which I really
> > enjoyed:
> >
> > http://www.amazon.com/IPv6-Second-Protocol-Practice-Networking/dp/155860
> > 8109/ref=pd_bbs_sr_8/103-7726709-8680640?ie=UTF8&s=books&qid=1173569643&
> > sr=8-8
> >
> > Also, I assisted NetMasterClass in creating the following product - it
> > covers everything you might see in the lab and then some:
> >
> >
> > http://wwww.netmasterclass.com/site/cod_ipv6.php
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > Lab Dude
> > Sent: Saturday, March 10, 2007 6:02 PM
> > To: ccielab@groupstudy.com
> > Subject: IPv6 Link local addressing and FR maps
> >
> > Hi
> >
> > I am a bit confused about Link local addressing on IPV6. A couple of
> > questions:
> >
> > 1. In what scenarios do I need to configure IPv6 Link-local address on a
> > particular interface?
> >
> > 2. Can I just do with a global address on an interface? Or do I need to
> > have
> > a link-local interface on an interface as well?
> >
> > 3. When configuring FR maps, do I need to have link local FR maps in
> > addition to Global IPv6 address maps? Or can I just do it with Global
> > address map to the spoke/hub?
> >
> > 4. What routing protocols (OSPF, RIP) over FR require for me to
> > configure
> > Link-local ip addresses/FR maps in addition to Global addresses?
> >
> > Your help in this regard or some good documentation that explains the
> > differences between Global and Link-local IP addresses and their usage
> > for
> > IPv6 would be highly appreciated.
> >
> > Thanks
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
>_______________________________________________________________________
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sun Apr 01 2007 - 06:35:51 ART