From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Wed Oct 12 2005 - 17:21:55 GMT-3
Manoj,
It depends on what routing protocol you're using. Configure an IPv6 loopback on each of these devices and then run RIPng on all the links. Run OSPFv3 with the broadcast and non-broadcast network types. Run OSPFv3 with the point-to-multipoint and point-to-multipoint non-broadcast network types. Look at the routing tables and test reachability. How are these scenarios similar or different?
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
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________________________________________
From: manoj menon [mailto:manojmenon123@yahoo.com]
Sent: Wednesday, October 12, 2005 3:06 PM
To: Brian McGahan; Stefan Grey; Lee.Donald@t-systems.co.uk; ccielab@groupstudy.com
Subject: RE: IPV6 addressing
Brian,
I have a question in addition to this below topic:- I understand the need to have link-local addressing mapping between two framer-relay end-points. However, considering the below scenario,
R1---------> R3 <----------R2,
where R1, R2 are spokes and R3 is the hub, FE80::1, FE80::2, F80::3 are the respective link-local address (R1, R2, R3)
R1#
interface
frame-relay map ipv6 FE80::2 103 --??? (Spoke-to-Spoke), I thinnk its not required as link-local address significant only that particular link, unlike global unicast address...
all other mappings are omitted ....
Kindly Advise
Regards,
Manoj
Brian McGahan <bmcgahan@internetworkexpert.com> wrote:
> In such a case should frame-relay map ipv6 also be configured for the
> link-local address of the other side or not. And when configured what
> could
> be the purpuse?? Because if not configured link-local addresses are
just
> unusefull there because they can't ping each other directly.
> Just some of my thoughts about it.
Yes it must be configured because the link-local addresses are
used for route recursion. Unless you provide layer 3 to layer 2
resolution for them traffic cannot be encapsulated on the interface.
This however is not to say that the link-local addresses need to be
resolved just to exchange routing information, since OSPFv3 uses
multicast to FF02::5 and FF02::6 (like 224.0.0.5 and 224.0.0.6 in IPv4).
Look at the OSPFv3 installed in the routing table and look at the next
hop value. If you "debug ipv6 packet" you will see encapsulation
failing for the remote link-local address unless you have resolution for
it.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
24/7 Support: http://forum.internetworkexpert.com
Live Chat: http://www.internetworkexpert.com/chat/
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Stefan Grey
> Sent: Wednesday, October 12, 2005 5:05 AM
> To: Lee.Donald@t-systems.co.uk; ccielab@groupstudy.com
> Subject: RE: IPV6 addressing
>
> Sure I have read about ipv6 Ospf and ipv6 over frame-relay. But now I
am
> still a little bit confused about the link-local addresses:
>
> look:
> R1 - R2 when we configure ipv6 addresses on R1 interface and R2
interface
> their serial interfaces have 2 ipv6 addresses one which we have
> configured
> and 2nd which is link-local ipv6 address and it has it by default.
Next we
> can configure by ipv6 ospf 1 area 0 command ipv6 ospf between them.
And
> sure
> we configure frame-relay map ipv6 address for the ipv6 address which
we
> have
> configured: Now we have just normal ipv6 ospf configuration of ospf.
> (which
> is documented in the doccd)
>
> My question is in other thing.
> 1. How to be with link local addresses which they have by default. by
ipv6
> ospf 1 area 0 command they are also involved to the ospf. but untill
> specially configured they can't be used because they have not
frame-relay
> map ipv6 command. But when we configure it, ipv6 ospf protocol is
between
> those addresses which we have configured and between link-local
interfaces
> as well.
>
> In such a case should frame-relay map ipv6 also be configured for the
> link-local address of the other side or not. And when configured what
> could
> be the purpuse?? Because if not configured link-local addresses are
just
> unusefull there because they can't ping each other directly.
> Just some of my thoughts about it.
>
> What do you think??
>
> Thaks,
>
>
> >From: Lee Donald
> >Reply-To: Lee Donald
> >To: Stefan Grey , pv.ryan@gmail.com,
> >ccielab@groupstudy.com
> >Subject: RE: IPV6 addressing
> >Date: Wed, 12 Oct 2005 10:05:23 +0100
> >
> >Stefan,
> >
> >If you are given the whole address then use it, if not, add the
eui-64
> >keyword at the end which will make up the rest of the address using
part
> of
> >the mac.
> >
> >Pretty straight forward really, for example if you have
> >2001:CC1E:192:10:1::254/128 this is the subnet and the host address
and
> >does
> >not require a supplement from the mac so you would not use the eui
part.
> >
> >If I had the address 2001:CC1E:192:10:1::/64 eui then this is only
the
> >subnet and would need supplementing with the mac to make up a full
> address.
> >
> >Does that help you?
> >
> >Regards
> >
> >Lee.
> >
> >
> >
> >-----Original Message-----
> >From: Stefan Grey [mailto:examplebrain@hotmail.com]
> >Sent: 12 October 2005 09:46
> >To: pv.ryan@gmail.com; ccielab@groupstudy.com
> >Subject: Re: IPV6 addressing
> >
> >Sure, but how to understand from the task which address type to use??
> >ipv6 address 2080:1:1:43::3/64
> >
> >or ipv6 address 2080:1:1:43:3/64 eui-64???
> >
> >
> >
> > >From: The Great Ryan
> > >Reply-To: The Great Ryan
> > >To: Stefan Grey
> > >CC: ccielab@groupstudy.com
> > >Subject: Re: IPV6 addressing
> > >Date: Wed, 12 Oct 2005 16:29:17 +0800
> > >
> > >for 1, you need to assign host address
> > >for 2, it will mac-address (plus insert something) as host address
> > >for 3, you can assign ipv6 address (not limited to /128) on
loopback
> > >interface
> > >
> > >
> > >Ryan
> > >
> > >
> > >2005/10/12, Stefan Grey :
> > > > Hi group,
> > > >
> > > > I wonder what is in reallity the diiference in using following
ipv6
> > > > addresses (and what is the difference??)
> > > >
> > > > on physical interfaces like serial and ethernet:
> > > >
> > > > 1. (ipv6 address)/64
> > > >
> > > > or
> > > >
> > > > 2. (ipv6 address)/64 eui-64
> > > >
> > > > How could be know from the task which one should be configured
in
> any
> > > > particular situaltion???
> > > >
> > > > 3. for loopbacks as I understand always just (ipv address)/128
> address
> > > > should be used???
> > > >
> > > > Thanks,
> > > >
> > > >
This archive was generated by hypermail 2.1.4 : Sun Nov 06 2005 - 22:00:50 GMT-3