From: Scott Morris (swm@emanon.com)
Date: Wed Mar 14 2007 - 09:20:27 ART
1. Link local exists for you (if you don't do anything) or you can
configure it yourself to save on typing.
E.g. using "ipv6 address fe80::1 link-local" on R1's interfaces makes things
predictable and easier to type in that having to look up whatever MAC
address there is! Otherwise, you follow whatever the lab asks you to do in
terms of global unicast or site-local or whatever. They are simply
addresses.
2. The different is that with your first address if you forget to put the
"eui-64" at the end, ".0" IS indeed a valid address in the IPv6 world, and
you could not only confuse yourself, but also end up with duplicate address
warnings and be very irritated!
EUI-64 will auto-assign the host portion for you. The ::1 option you used
means that YOU can choose the host portion as well. Auto-addressing is a
feature of IPv6, but not one that you are required to use if you don't want
to!
3. Same rules as IPv4. If you are on the same subnet, you'll want to have
Layer3 to Layer2 mapping (otherwise you'd get "encapsulation failed"
messages in "debug ipv6 packet") just like in Ipv4! The difference here is
that you have multiple addresses to use!
The same logic applies though as it does for IPv4. So I think you just may
be making this more complicated in your head than need be! The only
difference is that we have more address (link local + others), and that the
addresses are bigger and uglier.
Relax... Breathe deeply (not too much or you'll hyperventilate!), and just
take it one step at a time!
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
Salau,Olayemi
Sent: Wednesday, March 14, 2007 7:31 AM
To: Cisco certification
Subject: IPv6 on Frame-Relay
Hello Guys,
Apologies if so many of you find this appalling, I have searched through GS
archives and have gone through so many posts on this topic.
Unfortunately, I still don't get it straight. I know that I don't have to
get 100% to pass my CCIE in 12 days time, but I am genuinely aspiring for
120% to be honest.
IPv6 is the only topic that I still don't have a good grasp with; I've read
DocCD on IPv6 and personally found this to be the most insufficient. I have
even gone as far as looking through the RFCs documentations and all stuff,
but I see GS as my last resort in understanding the "Behind the doors"
principles with this IPv6.
Knows:-
I know what IPv6 is all about and why we have them.
I know the difference between IPv6 and IPv4 and "How" to configure them
I know IPv6 is 128bits, first 64bits representing network and the last
64bits representing hosts
I know the theoretical difference between Site-Link, Link-Local and Global
Addresses
I know theoretically that you'll have to map remote link-local Addresses to
respective frame-relay pvc only when you're using Dynamic Routing Protocol
within the IPv6 domain.
Don't knows:-
1. When would I need to configure Global Addresses and when to
configure Site-Link/Link-Local Addresses?
- Will this be based on what's given in the question
2. What is the difference between configuring something like
2001:CC1E:1234::/64 on an interface, and something like
2001:CC1E:1234::1/64
- What's the technical difference between this one, since I can
manually configure link-local FE80::1/64 to influence the host portion for
2001:CC1E:1234::/64
3. When would I need to use just static route to get to remote
link-local/global addresses and when to just use frame-relay map ipv6 <addr>
<dlci> [b] command for local-link addresses.
- Will this be based on what's given in the question with
regards to using ipv6 static route or dynamic protocol
- Is the reason for 3. because routers don't forward link-local
address by default?
Once again, I apologise if this happen to disturb anyone considering the
fact that there are some posts within the archives and my Lab is in 12 days
time, I just don't want to memorise configuration steps, my preparation as
be centred around understanding the principles behind things. In this case,
DocCD has been inadequate for me.
So many people have mentioned the IPv6 seminar delivered by IE and IPExpert,
I've searched everywhere on their websites but couldn't find
IPv6 seminar in their archives. Please if any of you have the free archived
seminar by IE/IPExpert, let me know ... Don't know if IPv6 can take up to 8
points in the exam, but this can make a difference as you'll agree with me.
Many Thanks
This archive was generated by hypermail 2.1.4 : Sun Apr 01 2007 - 06:35:51 ART