Extended ACL Configuration Example

Extended acl with packet tracer

Packet Tracer Extended Access Lists Configuration


In this lesson we will focus on Cisco Extended ACL Configuration with Cisco Packet Tracer. We will use the below topology for our packet tracer configuration.


Extended acl with packet tracer


You can DOWNLOAD the Cisco Packet Tracer example with .pkt format at the End of This Lesson.


Like Standard ACL configuration example, we will use one router, one destination server and 3 PCS in common. The switches in the topology will onlu used for port need.


Extended ACLs are a little complex if we compare with Standard ACLs. With Extended ACLs, we can restrict or allow specific things like destination, protocol or port.


In this Cisco Extended ACL Configuration example, we will allow/deny ICMP protocol through the server. As you know, ICMP is ping protocol. Here, PC0 and PC1 will be allowed and PC2 will be denied.



Extended Access-List Configuration


Let’s start to configure router for our Cisco Extended ACL Configuration.

For Extended ACLs, we can use Extended Access-List Number range 100 to 199. Here, we will use 100.


Router # configure terminal
Router (config)# ip access-list extended 100
Router (config-ext-nacl)# permit icmp host
Router (config-ext-nacl)# deny icmp host host host-unreachable
Router (config-ext-nacl)# end
Router # copy run start


You can also DOWNLOAD all the Packet Tracer examples with .pkt format in Packet Tracer Labs section.


Lesson tags: ACL, access-list, Extended ACL
Back to: CCNP Enterprise 300-410 ENARSI > Access Lists

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