From: Huang Laurence (huangyinxiao@gmail.com)
Date: Mon Mar 12 2007 - 07:50:23 ART
Hello guys,
As far as I know, Without link-local mapping in frame-relay, ping cannot go
through frame-relay.
Just yesterday, when I configure ipv6 site-local address on frame-relay
interface without enabling link-local mapping,
the frame-relay router which enable ipv6 do have routes. But can not ping.
This is my experience.
Can anyone explain to me.
Cheers,
Laurence
On 12/03/07, mmmmmmmmmmmm mmmmmmmmmmmm <now_on_the_dark_side@hotmail.co.uk>
wrote:
>
> 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
> > >
> > >
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