This video I'm going to demonstrate how OSPF version 3 Radice conform neighbor relationships without
manually configuring IP addresses on interfaces.
In other words in the topology we'll form a neighbor relationship between Rotto one and Rodda two without
configuring IP version 6 addresses on the gigabit 00 interfaces.
This will demonstrate how a way SPF forms neighbor relationships using link local addresses and doesn't
require IP version 6 addresses to be configured or IP version 4 addresses.
So in the apology the two routers have just booted up.
There is no configuration on the routers.
I'll bypass the initial configuration dialog so that we can configure the routers manually so the right
on the left will call rodded one show IP route shows us that they are no IP version formats available
on this router show IPV 6 raht shows us that there are no IP version 6 Roths available on the Sprouter
at the moment.
These routers have just booted up again with no configuration.
So show IP Brauch no IP version for Roth's show IPV 6 route no IP version 6 runs show IP interface brief
No IP addresses configured on of one show IPV 6 interface brief shows us that they on no IP version
6 addresses
same on the side show IP interface brief No IP version for addresses show IPV 6 interface brief No IP
version 6 addresses configured.
OK so IPV 6 unicast routing needs to be enabled for us to use SPF what we'll do now is enable what we
speak as a routing protocol the router will complain.
As you can see there are no Rodda ID can be selected and that's because we have no IP version 4 addresses
configured so I need to select a route ID in dotted decimal notation such as the following IPV 6 unit
cost routing IP V-6 Rodda SPF 1.
Once again we need to configure a route ID.
I'll configure this side as two door to door to talk to show IPV six SPF interface brief shows us that
OSPF is not enabled on any interfaces on the router.
What we have to do is go on to interface's
and enable IPV 6 on an interface
and then enable OSPF on that interface on the side to kickabout 0 0 IP V-6 enable to enable IP V-6 on
the gigabit 00 interface and then IPV 6 OSPF process ID is one area we'll set to zero.
So now show IPV 6 OSPF interface brief shows us that OSPF is enabled on gigabit 0 0 with a process id
of one in area zero.
At the moment the stage is down and thats probably because I didn't enable the interface so let's do
that.
So now show IP V-6 OSPF interface brief.
Notice the stage is set to wait all no shut the interface on the side.
Show IP the CICS interface who is P.F. interface brief OSPF is enabled on gigabit to 00 in area 0 using
P.F. process 1.
The state is white at the moment.
Sure IP V-6 neighbor we are forming a new relationship with a broad with neighbor ID wondered wondered
wondered what on the side show IPV V-6 OSPF and neber notice the neighbor relationship has now moved
to extort and has just moved to full so you can see the neighbor relationship went to fall there.
Brought a one is a PDR and on the side we can see that Rodda T is the designated Rodda.
So we formed a neighbor relationship
with the other rodder without enabling an IP version 6 address on the gigabit 00 interface.
So notice there's no IP version 4 address and there is no IP V-6 address enabled on the interface and
the same is true on the site.
But we do have a neighbor relationship with the other router and if we look at the writing table we
can see at the moment that we have a local network in the running table but no other routes exist.
The show IP V-6 router shows us that a link local address is configured on gigabit 00.
So show IP V-6 interface gigabit 00 shows us that the interfaces up IPV 6 is enabled.
This is the link local address on the interface.
The router has joined various multicast groups including two OSPF groups.
This is all devices on the local segment on the side show run interface gigabit 00 for show IP V-6 interface
Keiga.
But 00 Raba shows us the link a local address on the side so to prove that routing works on Route 1
I'll configure a loopback IP address so IPV 6 address.
And in this case we'll call it 2001 Facebook one.
Colin Colan one slash 1:28 on the site interface link back.
Zero PV 6 address 2001 Facebook
colon colon to 128.
Notice those all 128 networks.
So these two are separate networks.
Show IPV six route.
We have a loopback address in the writing table but we don't see the address because we need to advertise
that network into OSPF.
So now once that network gets advertised we should see it available in the writing table of rodded too.
And there you go.
We have learnt about Facebook one via the link local address of Rotto one once again shows like PV 6
interface gigabit 00.
This is the link local address of router one and that's the address that we are learning the Rampton
from on the side show IPV 6 route we haven't learnt about the loop back on the site and I think I made
a mistake.
So let me double check the configuration I made to the zeros rather than a 2.
So what I'll do is remove that IP address and put it back
to call on column 2 IPV 6 SPF 1 area zero.
Once that network gets advertised we should see it on Broadway one.
And there you go the route is now available on Radu 1.
So we've learnt that the address via OSPF.
Let's try and ping the address.
What do you think.
Will it work.
So Ping IPV 6 address.
Does it work.
Yes it does.
We can ping the loop back of product to the side show IPV 6 ROFFT can we paying
the loop back.
Yes we can notice you don't have to specify IPV 6 The router is intelligent enough to work out that
this is an IPV six ping debug IPV six ICMP.
Let's do that ping again
notice we see that an echo request was received and a reply was sent.
So again the gigabit 0 0 interfaces of both these routers don't have either not provision for address
or an IP version 6 address configured as soon as we enabled IP version 6 on the interface a link a local
address was allocated as shown here.
And OSPF uses a link local addresses for neighbor establishment and romped advertisement and that's
what of demonstrated here.
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