Hello, this is your host again. And here in this case number two, the statements is telling us to allow a network that is not subnets. And to permit everything else. So when it comes to class, a network class is defined by the first bit of the octet, and it's set to zero. That indicates that this is a class a network and there are seven bits up to that. The seven bits are for the network.
And the rest of the bits, which are the 24 bits are for the hosts our statements which basically reflect that. So it says, class, a network is not subnets that means it's Not using anything, which is from big number nine. So the 24 bits are for the host. And anything that's less than bit number nine is actually defined as a network. So follow my statement, as we go ahead with the configuration and you will, you will have a better understanding of how this is implemented. So I'm going into the console of r1.
I can see the routing table from before but let me increase the font. And so we are here in r1. So let's let's apply the statement. So yeah, so we will go into the config key. And we'll start putting the prefix statement. So IP prefix We will give it a name, let's say statement statement a.
And we will deny zero dot zero dot zero slash, one. As we know Class A has only one and we will say greater or equal to nine. So we are denying anything that's greater or equal to up to nine bits. Apologies. So the statement is basically allowing everything else so IP prefix list statement a permit zero dot zero dot zero slash one less than or equal to 32. And now we will apply that to the route here GRP 10 process.
And let's see how that is kind of be implemented here. So router here eigrp 10 distribute less per prefix, take 28 and we know it's coming inward. So class data coming from 192 168 dot 10 dot one which is from the direction of our three router from and it's coming inward from Israel. Have a zero slash zero. Let's save the configuration there is a change with the routing table and it has resync. If I do show IP route, we can only see now we can see now we can see only the Class A networks that are not selected.
And the rest of the networks are filtered. As you can see all the other networks are taken out from the routing table that were submitted. I hope this was useful and thank you very much