Examples Of Acls And Vlan Maps - Cisco 4500M Software Manual

Configuring VLAN Maps
Command
Step 6
Switch(config)# show
running-config
Step 7
Switch(config)# copy
running-config startup-config
You can use the no vlan access-map name global configuration command to delete a map. You can use
the no vlan access-map name number global configuration command to delete a single sequence entry
from within the map. You can use the no action access-map configuration command to enforce the
default action, which is to forward.
VLAN maps do not use the specific permit or deny keywords. To deny a packet by using VLAN maps,
create an ACL that would match the packet, and then set the action to drop. A permit in the ACL is the
same as a match. A deny in the ACL means no match.

Examples of ACLs and VLAN Maps

These examples show how to create ACLs and VLAN maps that for specific purposes.
Example 1
This example shows how to create an ACL and a VLAN map to deny a packet. In the first map, any
packets that match the ip1 ACL (TCP packets) would be dropped. You first create the ip1 ACL to permit
any TCP packet and no other packets. Because there is a match clause for IP packets in the VLAN map,
the default action is to drop any IP packet that does not match any of the match clauses.
Switch(config)# ip access-list extended ip1
Switch(config-ext-nacl)# permit tcp any any
Switch(config-ext-nacl)# exit
Switch(config)# vlan access-map map_1 10
Switch(config-access-map)# match ip address ip1
Switch(config-access-map)# action drop
This example shows how to create a VLAN map to permit a packet. ACL ip2 permits UDP packets; and
any packets that match the ip2 ACL are forwarded.
Switch(config)# ip access-list extended ip2
Switch(config-ext-nacl)# permit udp any any
Switch(config-ext-nacl)# exit
Switch(config)# vlan access-map map_1 20
Switch(config-access-map)# match ip address ip2
Switch(config-access-map)# action forward
In this map, any IP packets that did not match any of the previous ACLs (that is, packets that are not TCP
packets or UDP packets) would get dropped.
Software Configuration Guide—Release 12.2(25)EW
35-14
Purpose
Displays the access list configuration.
(Optional) Saves your entries in the configuration file.
Chapter 35 Configuring Network Security with ACLs
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