This is one of multiple videos discussing IP version 6.
Writing in this example writer 1 and writer 2 are connected via a serial interface.
These writers have just booted up and have no configuration apart from a default Genesis 3 configuration
so as an example if we use the command show IP interface brief we don't see any IP addresses configured
on the routers and all interfaces on the As are shut down
show IP vs 6 round shows no grants in the IP version 6 routing table because no IP version 6 addresses
have been configured on the router and we can see that by using the command show IP version 6 interface
brief output gives a similar information to what we would see using show IP interface brief all interfaces
are shut down so on Route 1 I'm going to enable IP version 6 a unique cost routing and then go on to
the serial interface and no shut the interface and configure an IP version 6 address of 2001 colon 1
colon colon 1 slash 64.
Now when we look at the IP version 6 routing table we see that a connected network exists as well as
a local network the local network is the IP address configured on that interface.
So this is the IP address that's configured on the serial zero interface which we can see as follows.
We're using a slash 64 mask so the connected network is displayed with a slash 64 mask but the 128 but
IP address is shown in the output as well routers will create IP version 6 of routes based on the unique
cast IP version 6 address configured on the interface.
So this command results in this network appearing in the writing table.
The writer also creates the host rot or local route using 128 but prefix for the IP version 6 address
configured on the interface.
If we shut that interface down and then look at the writing table again you can see that the IP address
has been removed from the writing table.
So in the same way as we have with IP version 4 the rot only appears in the writing table when the interface
comes up so interface serial to slash 0 is now up up.
So we have the subnet or connected route and to the local route or host route added to the routing table.
If the interface goes down the route is removed from the routing table or create a loop back address
on this rather with an IP version 6 address of 2001 face colon 1 colon colon 1 slash 64.
So show IP vs 6 rort should show us that that roster is added.
Here it is.
There's the connected network and there's the local or Rata IP address on it too.
We still don't have any IP addresses configured so show IP vs 6 rot shows us no rights in the IP version
6 routing table I'll enable IP version 6 unit cost routing and then go into the serial interface and
shut it and configure an IP version 6 address on the interface of two thousand and one.
Colin one.
Colon colon 2 slash 64.
While I'm here I'll configure the loop back address as you can see the several interfaces now come up
on both sides so the loop back interface will be 2001.
Colon face colon to Colon colon 1 so show IP vs 6 rot we can see multiple routes in the writing table
here's the connected root for the serial connected route for the loop back local ranked or route around
for the serial and loop back now wool brought it to be able to ping rider one on the serial interface.
Answer is yes and that's because they are directly connected to one another and they are configured
in the same subnet so rider 1 can also ping right at 2.
We can prove that by doing a debug commands a very similar type of vision for so debug IP vs 6 ICMP
when we do the ping we can see the output here in a similar way to IP version 4 notice IP version 4
shows no ruts in the writing table because we haven't configured any IP version for addresses on these
riders this network is running a peer IP vs 6 implementation wheel rather to be able to ping the loop
back of wrought a 1 What do you think we'll run it to be able to ping the loop back of wrought a 1 debug
IP packet will show us the results.
So lets paying the loop back of wrought a 1 echo request is being sent and I did the wrong debug there.
Be careful of that mistake let she's debug IP vs six pack it rather and see what happens now so this
is better.
We could see an echo is being sent to stop that ping now so an echo is being sent the road has picked
this address as the source address.
In other words the serial interface or outgoing interface is used as the source address for ICMP traffic
something very similar will happen in IP vision for it's trying to send an echo to that address using
this local IP address.
With a destination set to that and the important piece is notice raft is not found again raft is not
found.
Roger is not found the rudder can not send traffic to that destination network because it doesn't appear
in the IP version 6 routing table.
So what we need to do here is configure static ruts.
In this example because we are using a serial interface we can configure a runt using the local outgoing
interface so very similar to IP version 4.
You're going to use the IP vs 6 right command and specify the destination right which is 2001 face colon
1 colon colon slash 64 and the local outgoing interface is going to be serial to slash zero.
So now can we ping that network.
Yes we can.
We're getting a lot of debug information so I'll turn off the debug scrolling up you can see that the
ping succeeded and if we do that again notice we can ping the loop back of route of one a of one doesn't
know about the loop back brought it to.
So we need to configure that so IP v 6 runs destination is two thousand and one colon face colon two
colon colon one slash 64 outgoing interface is gonna be serial to slash zero so show IP six round we
can see that romped added to the writing table and we should be able to paying two thousand or one face
to Colon column one and that works.
So again just like with IP version for you need to have a root in the routing table to be able to reach
a destination network.
In this example we've added routes using static routes to the IP version 6 routing table and using the
local outgoing interface rather than next top address so show run pipe include route shows us that we
are using the outgoing local interface to get to the destination network that works well in point to
point serial connection such as this but won't work well when using ethernet when using ethernet you
should use the next hop IP address these riders are using C 30 725 software version 12 that four of
the Iaw in a subsequent video I'll configure static graphs using next top IP address but I'll use version
15 software and I'll use viral images to do that.
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