34-32
Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide
OL-13270-01
Chapter34 Configuring Network Security with ACLs
Configuring VLAN Maps
Creating a VLAN Map
Each VLAN map consists of an ordered series of entries. Beginning in privileged EXEC mode, follow
these steps to create, add to, or delete a VLAN map entry:
Use the no vlan access-map name global configuration command to delete a map. Use the no vlan
access-map name number global configuration command to delete a single sequence entry from within
the map.
Use the no action access-map configuration command to enfor ce th e de f ault ac tion, w hic h is t o forw ar d.
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 set the action to drop. A permit in the ACL counts 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 b e dropped. You first create the ip1ACL 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
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 vlan access-map name [number] Create a VLAN map, and give it a name and (optionally) a number. The
number is the sequence number of the entry within the map.
When you create VLAN maps with the same name, numbers are assigned
sequentially in increments of 10. When modifying or deleting maps, you
can enter the number of the map entry that you want to modify or delete.
Entering this command changes to access-map configuration mode.
Step3 action {drop | forward} (Optional) Set the action for the map entry. The default is to forward.
Step4 match {ip | mac} address {name |
number} [name | number]Match the packet (using either the IP or MAC address) against one or more
standard or extended access lists. Note that packets are only matched
against access lists of the correct protocol type. IP packets are matched
against standard or extended IP access lists. Non-IP packets are only
matched against named MAC extended access lists.
Step5 end Return to global configuration mode.
Step6 show running-config Display the access list configuration.
Step7 copy running-config startup-config (Optional) Save your entries in the configuration file.