Hello again, this is your host Habib's a Korea. And in our first case, as it states here it says denied network 172 dot 16 dot 15 dot 32 slash 27. As you know slide 27 means it's 2552 255-225-5224 that's the subnet mask of this network and to permit all other networks so let's go ahead and apply the prefix list to the router and and that will exactly and it will exactly to this now the router that we can apply the prefix list to is going to be our one since it's the main router that is actually cutting a cut ties moments from r three and r two Having said that, I mean, the routing tables on each of the routers are sinking because all the tree routers are participating in the eigrp domain. So let's look at the routing table in r1 and apply to prefix list.
We're just bringing up the console and we will check the routing table. Let me just fix the font let me re type this show IP route. We can see there's a network here 172 dot 16 dot 15 dot 32 slash 27. Now we added this route by creating a loopback interface. This loopback address is added in our to just as an example to see how we can filter it. So now we are creating the prefix list we'll go to config.
Service very simple just follow my steps. IP prefix list. First we will give it a name. Name is statement. Deny And the network is 172 dot 16 dot 15 to 32 slash slash 27. Now as you can see slash 27 is accepted.
Now the second statement is to allow all other networks IP prefix list statement are meant zero dot zero dot zero dot zero slash zero less than or equal to 32 into so now our prefix list statement is done in this case. Now as you know we will apply this state member we have to To know from which direction this network is getting learned from. And we have indicated that this network is coming from our two which is actually the interface F Zero slash one. That is our interface that we can appoint this prefix list r1 is receiving it from the correction that's pointing from r two to r one on its interface FA zero slash one. So the way we applied the, the prefixes to go into the router, ei, GRP, 10 process, and then we'll write distribute list. prefix and then the name of the prefix list, which is a statement.
You can name anything We will put it inward because it's coming from inward direction. And FA zero slash one is the interface. Now I will accept an exit and I'll save the configuration. You can imaginarily see the resync is happening right away once the prefix list was applied to that interface. Now if I do show IP route and pull the routing table as you can see, I don't see the network 172 dot 16 dot 16 dot 32 slash 27. I don't see that means it's been filtered.
And now case one is resolved and we have achieved our purpose. Thank you very much. Bye bye