So he has ensemble network we have Rato one with Kid race 10 1 1 1 on Fosset Ethan in 0 0 10 1 2 1 1
cereal 1 slash 0 which is connected to our team or two is configured with 10 1:59 on Syria once left
zero and 10 1 3 1 on cereal 1 slash 1 or 3 is configured with 10 1 3 2 1 0 1 6 0 and 10 1 4 1 1 4.
Ethan It's 0 0 or 1 and all three are connected via another serial link and all configured with addresses
10 1 5 1 or 1 and 10 1 5 2 or 3.
Please note that the links feed the serial links have been set to 128 kilobits per second on Rotto 1
so run into phase serial once next Zerah will allow us to see the configuration in C it's got an IP
address and the bandwidth is being configured to 128 kilobits per second.
The same information can be viewed on serial once one IP address with bandwidth show IP protocols will
allow me to see that no routing protocols have been enabled on this router.
So going to level configuration mode I can now enable OSPF by copying the command Rodda OSPF and specifying
a process ID.
Once again this process ID is local to the Rodda and does not have to be the same on all of the route
as Zone Rotto one I'm going to specify one topping the command to show IP protocols will allow me to
see which routing protocols enable.
And as you can see OSPF is enabled with Prozess ID one and the router ID is set to 10 1 5 1.
However popping the commands to show IP OSPF interfaces will allow me to see that OSPF is not enabled
on any interfaces on the serrata OSPF will not fall neighbor relationships and will not exchange rates
for Naboo relationships to be established and for ops to be advertised.
You need to talk to them on network and then specify a network.
So I could specify 10 doc one and one of one the IP address of the FOS.
Ethan is 00 interface.
And then I can specify a wild card mosque.
This is an inverse mosque similar to an list with 0 in binary means match and one in binary means ignore.
So this is an exact match on that IP address.
OSPF will only be enabled on Phos.
Ethan It's 0 0.
You then need to specify an area.
And in this case I'm going to specify area 0.
The area can be specified as a decimal value in this range all inducted decimal IP address format.
We're just going to specify the area as Area 0.
Now topping the C'mon do show the OSPF interface allows me to see that OSPF is enabled on first.
Ethan It's 0 0.
The IP address on that interface is 10 1 1 1 slash 24 and the area that that interface is being put
into its areas Zira.
You can see once again that the process ID is one the router ID is 10 1 5 1 and the network type is
broadcast because phos Ethan its 0 0 is Ethernet OSPF will see this as a broadcast media but cost is
one once again referring back to the OSPF formula.
A hundred meg link will have a cost of 1.
Notice the priority is 12:54 which is the default.
There is no designated route on this network.
The hollow interval is 10 seconds.
The data interval is 40 seconds.
So a lot of information can be gathered just through the single C'mon topping that come on again.
Notice we have become that busy ignited Rodda our Rodda ideas 10 1 5 1 and the designated Rodda ID is
10 1 5 1.
In other words it's us.
Notice the interface IP address is 10 1 1 1 which is the IP address in this Fosset Ethan interface on
Ethernet as explained rodders will go through an election to determine the designated Rodda and backup
designator Rodda.
And that election has now taken place with our local Rodda becoming the designated Rodda because there
is no other Rodda on the segment.
So we are the defacto designated Rodda always be a high of it has not been enabled on the serial once
they've zero interface and serial once one interface.
So let's do that now.
I can talk the claim on network standard one to two to one the IP address of serial.
One slash zero.
Once again put in my wildcard mosque once again put in my area now stopping to come on show the OSPF
interface allows me to see that OSPF is enabled on cereal once selected 0 as well as FOSS.
Ethan its zero slash.
Hitting spacebar shows me that OSPF is not enabled on any other interfaces.
So once again Network 10 1 5 1 wildcard mosque and area will enable OSPF on the serial ones wanting
to face show Id always be if interface shows me that beef is now enabled on Syria one slice one cereal
one slice 0 as well as fast.
Ethan it is 0 0.
Being that come on again allows me to see information relating to the serial interfaces.
Notice that on both serial interfaces the Prozess ID is one as you would expect the Rodda ID is 10 1
5 1 as you would expect the network type however it's point to point OSPF is intelligent enough to realize
that this is a point to point link and thus the OSPF time sixty point point.
Notice the cost is 7 8 1 which is the cost of a 128 kilobits per second link.
Once again the hollow interval is 10 seconds.
The interval is 40 seconds.
But what you see here is designated Rodda and backup designated Rodda.
There is no need for an election on a point to point link because there are only two routers communicating
with each other.
So no election has taken place.
So just to give you the full Semitics of command control Zayde show IP OSPF interface shows me the interfaces
that OSPF is enabled on show IP protocols will allow me to see the writing protocols enabled in Misrata.
And as you can see here OSPF one has been unable the Rodda ID for the local raht is 10 1 5 1.
The number of areas configured on this route is one with one normal area.
Most of areas and no not so Stubley areas stubborn not to study areas or special types of OSPF areas
used to reduce the number of rats in the writing table.
The maximum number of parts that we will load balance across by default is four that could be changed
to 16.
We are opting for the following networks 10 1 1 1 10 1 2 1 10 1 5 1.
Notice the mosques we have specified the individual IP addresses.
When we entered the network command the referenced bandwidth is 100 megabits per second which is the
default the administrative distance of OSPF is 110.
Topping the come on show Aki Raat shows me that I only have directly connected routes in my writing
table.
The reason why is we have not enabled OSPF on Route 2 and Route 3 so we are not receiving rocks from
either of those routers.
I can top that come on show ID.
Yes which gives me a lot of information relating to the gif process running on this router.
Once again process one is being unable the Rodda IDs 10 1 5 1.
We can see timers and statistics like this for instance initial SPF schedule delay five 5000 milliseconds.
The Rotto will wait 5 seconds before running the Ischia algorithm when notified of a network going down
or a new network that's being added to the topology.
The idea of this is to allow the network to stabilize before running the OSPF algorithm.
Notice the minimum hold time between two consecutive SBF algorithm calculations is 10 seconds.
So in other words we will not run the SBF algorithm continuously.
There is a gap of 10 seconds between calculations.
We can see that the backbone area is 0 has been enabled in Misrata and three interfaces have been put
into this area.
No think occasion has been enabled on this area and we lost executed the SPF algorithm about five minutes
ago and it executed three times.
So let's enable OSPF and rockety and see how the output changes Conrado to show the interface brief
will allow me to see the interfaces configured on the router.