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Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
OL-8915-03
Chapter 31 Configuring Network Security with ACLs
Configuring VLAN Maps
•
You can configure VLAN maps on primary and secondary VLANs. However, we recommend that
you configure the same VLAN maps on private-VLAN primary and secondary VLANs.
•
When a frame is Layer-2 forwarded within a private VLAN, the same VLAN map is applied at the
ingress side and at the egress side. When a frame is routed from inside a private VLAN to an external
port, the private-VLAN map is applied at the ingress side.
–
For frames going upstream from a host port to a promiscuous port, the VLAN map configured
on the secondary VLAN is applied.
–
For frames going downstream from a promiscuous port to a host port, the VLAN map
configured on the primary VLAN is applied.
To filter out specific IP traffic for a private VLAN, you should apply the VLAN map to both the
primary and secondary VLANs. For more information about private VLANs, see
Chapter 14,
“Configuring Private VLANs.”
For configuration examples, see the
“Using VLAN Maps in Your Network” section on page 31-33
.
For information about using both router ACLs and VLAN maps, see the
“VLAN Maps and Router ACL
Configuration Guidelines” section on page 31-36
.
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 enforce the default action, which is to forward.
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
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.
Step 3
action
{
drop
|
forward
}
(Optional) Set the action for the map entry. The default is to forward.
Step 4
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.
Step 5
end
Return to global configuration mode.
Step 6
show running-config
Display the access list configuration.
Step 7
copy running-config startup-config
(Optional) Save your entries in the configuration file.
