Cisco 2950G 24 Software Configuration Guide - Page 515
Displaying Access Groups, Examples for Compiling ACLs
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Chapter 25 Configuring Network Security with ACLs Examples for Compiling ACLs Displaying Access Groups Note This feature is available only if your switch is running the EI. You use the ip access-group interface configuration command to apply ACLs to a Layer 3 interface. When IP is enabled on an interface, you can use the show ip interface interface-id privileged EXEC command to view the input and output access lists on the interface, as well as other interface characteristics. If IP is not enabled on the interface, the access lists are not shown. This example shows how to view all access groups configured for VLAN 1 and for Gigabit Ethernet interface 0/2: Switch# show ip interface vlan 1 GigabitEthernet0/2 is up, line protocol is down Internet address is 10.20.30.1/16 Broadcast address is 255.255.255.255 Address determined by setup command MTU is 1500 bytes Helper address is not set Directed broadcast forwarding is disabled Outgoing access list is permit Any Inbound access list is 13 Switch# show ip interface fastethernet0/9 FastEthernet0/9 is down, line protocol is down Inbound access list is ip1 The only way to ensure that you can view all configured access groups under all circumstances is to use the show running-config privileged EXEC command. To display the ACL configuration of a single interface, use the show running-config interface interface-id command. This example shows how to display the ACL configuration of Gigabit Ethernet interface 0/1: Switch# show running-config interface gigabitethernet0/1 Building configuration... Current configuration :112 bytes ! interface GigabitEthernet0/1 ip access-group 11 in snmp trap link-status no cdp enable end! Examples for Compiling ACLs For detailed information about compiling ACLs, refer to the Security Configuration Guide and the "IP Services" chapter of the Cisco IOS IP and IP Routing Configuration Guide for IOS Release 12.1. Figure 25-2 shows a small networked office with a stack of switches that are connected to a Cisco router. A host is connected to the network through the Internet using a WAN link. 78-14982-01 Catalyst 2950 Desktop Switch Software Configuration Guide 25-23
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