On to show Id always be a neighbor noticed the neighbor relationship it's changed to use the loopback
address of quadrupole one so unable or is given route three to ensure full connectivity between all
subnets
show IP interface brief will allow me to see the interfaces configured on those Rodda and you can see
Foster Ethan at zero.
And the two serial interfaces serial once in Sarah and Syria once that one have IP addresses enabled
on them and the interfaces are up lets configure the loop for the Shradha interface Luebeck zero.
IP address may just make it of three topping the come on show IP protocols will allow me to see that
there are no protocols enabled in Misrata.
Once again show IP protocols displays no output as no routing protocols I enabled going into global
config mode Rodda OSPF and I could use Prozess ID three in this case I'm using different process IDs
just to prove the point that the process IDs a local to the router and do not have to be the same across
all routers in the real world it would make more sense to use the same process number on all of UROD
is if possible.
In other words standardize on a process id in this case I could tap a common network of 1.0 3.0 and
put in the wildcard MOS as follows.
In other words use the exact inverse of the network mosque.
And as you can see here a neighbor relationship was established between Route 3 and rockety.
I could use the command to show the OSPF neighbors to see that that neighbor relationship has established
I could then enable OSPF on serial 1 slash 1 so Network 10 on Wonder 5.0 with the wildcard mossed putting
it into areas Zira and now neighbor relationship has been established with Route 1.
So do show IP OSPF Naylor's shows me that on Route 3 I have 2 neighbor relationships with router 1 and
with router t topping that come on network 10 1 4 0 will enable OSPF on the fust.
Ethan 00 interface.
So now typing the command do show the OSPF interface allows me to see that OSPF is enabled on the first
Ethernet 00 interface the serial one slash wanting to base 0 1 selection Zira interface but not on the
loopback interface.
Even though OSPF is not enabled in the loopback interface the Rodda ID is set to the loopback IP address.
The last thing I should do this network are three exact match areas Zerah not topping that come on do
show B if interface
allows me to see that OSPF is enabled in the loopback interface.
Going back to privilege mode I can topic them on show IP OSPF neighbor to see my neighbors and once
again you can see Rotto one and rodded it but I could also do this C'mon show off the OSPF neighbor
and specify an individual neighbor.
And this allows me to see more detailed information about the neighbor.
You can see that the neighbor with Rodda ID quadruple one and interface address 10 1 5 1 is connected
by a serial one slash one and the neighbor relationship is full.
In other words we are exchanging updates with one another.
Bakra not one you can see that the relationship with router three came up right got that and ON-TOPIC
them on show ID ruffs and I can see that I've learned about network quadruple to network with triple
three as well as a Network 10 1 3 0 and Network 10 1 4 0 noticed this gap means that we doing load balancing
because the costs are the same.
In other words from Route 1 point of v to get to Network 10 1 3 0 we could either use this link which
is 128 kilobits per second or we could use this link which is also under twenty eight kilobits per second.
So there are two possible paths to use to get to this network.
OSPF supports equal cost load balancing hopping that come on show IP OSPF database allows me to view
the OSPF quality database.
And as you can see here for always be a router with ID quadruple one process id one area zero.
We have learnt about three routers ourselves.
Router 2 and router 3.
The number of links on Rotto one is 66.
The reason for that is a serial link as a link count of two Router one has two serial links 0 1 0 0
and serial 1 7 1.
In other words two plus two equals four.
Route 1 also has a loop like interface plus one equals five and it has a fast Ethan and zero zero interface
so plus one equals six.
I can see that in more detail by tapping.
C'mon show Id always be a database.
I noticed this option Rodda and then specifying the Rodda ID in this case ourselves.
And you can see once again that in area zero Rato with Russia ID quadruple one has a stub network which
is a loop back interface with an IP address of quadruple one.
And Moscow says that he as well as a point to point link connected to neighboring Rodek quadruple three
with a local IP address 10 1 5 1.
In other words this serial point to point link
as well as Network 10 1 5 0 slashed 24.
In other words the network on the serial link its also connected to Rodda quadrupled to with local IP
address 10 1 to 1.
In other words this interface and on that interface we have Network 10 1 2 0.
We are also connected to Network 10 1 1 0 if you count those networks we have 1 2 3 4 5 6 networks connected
to Rotto 1 notice on serial links there are two entries the entry connected to the neighboring router.
On the point to point link as well as the actual subnet on that point to point link.
So once again show Id always the database shows me that for a local router we have 6 as the link count
because they are two entries for the serial links.
This is the top alogical database which is shared by all rodders so unrounded te So IP OSPF database
will allow me to see that that router has the same information as router 1.
Its the same database on router 3 so IP OSPF database will Lami to see the exact same database link
state routing protocols shared the same database within the network or area.
These three routers on the same area.
So all three of them share the exact same database back and Rotto one I could talk to.
Come on debug.
IP Osugi if events do you see event information on Route 1.