Cisco Catalyst 4500 Series, Руководство по настройке программного обеспечения, Страница: 1646 / 2086

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 62 Configuring Network Security with ACLs
Configuring VLAN Maps
Step 3
Use the vlan filter global configuration command to apply a VLAN map to one or more VLANs.
Note You cannot apply a VLAN map to a VLAN on a switch that has ACLs applied to Layer 2 interfaces (port
ACLs).
VLAN Map Configuration Guidelines
When configuring VLAN maps, consider these guidelines:
• VLAN maps do not filter IPv4 ARP packets.
•
If there is no router ACL configured to deny traffic on a routed VLAN interface (input or output),
and no VLAN map configured, all traffic is permitted.
• Each VLAN map consists of a series of entries. The order of entries in a VLAN map is important.
A packet that comes into the switch is tested against the first entry in the VLAN map. If it matches,
the action specified for that part of the VLAN map is taken. If there is no match, the packet is tested
against the next entry in the map.
•
If the VLAN map has at least one match clause for the type of packet (IP or MAC) and the packet
does not match any of these match clauses, the default is to drop the packet. If there is no match
clause for that type of packet in the VLAN map, the default is to forward the packet.
•
The system might take longer to boot if you have configured a very large number of ACLs.
Creating and Deleting VLAN Maps
Each VLAN map consists of an ordered series of entries. To create, add to, or delete a VLAN map entry,
perform this task:
Command Purpose
Step 1
Switch# configure terminal
Enters global configuration mode.
Step 2
Switch(config)# vlan access-map name
[ number ]
Creates 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.
This command enables access-map configuration mode.
Step 3
Switch(config-access-map)# action { drop |
forward }
(Optional) Sets the action for the map entry. The default is to
forward.