Alcatel Carrier Internetworking Solutions Switch/Router 사용자 설명서

Page 22-4

. Network address policies enable you to define membership in the 

VLAN

 on the basis of network address criteria. 

For example, you can specify that all 

IP

 users with a specific subnet mask be included in the 

VLAN

. Or, you can specify that all 

IPX

 users in a specific network address area using a certain 

encapsulation type be included in the 

VLAN

.

If you define network address and port or protocol rules in the same 

VLAN

, the network 

address rules will take precedence over the port and protocol rules should any conflict arise. 
To reverse this precedence (i.e., port and protocol rules take precedence over network 
address rules) you must add the following line to the switch’s 

 file:

. User-defined policies enable you to define membership in the 

VLAN

 on 

the basis of a specific pattern within a frame. All devices that originate frames containing this 
pattern are assigned to the 

VLAN

. The pattern is specified by defining an offset, a value, and a 

mask.

. A port binding policy specifies a particular device to be included in the 

mobile group or AutoTracker VLAN. You can bind a device’s IP address to a switch port and 
a MAC address, or bind a device’s MAC address to a protocol and a switch port.

. These policies are similar to standard port policies, but apply to switch 

ports to which DHCP client workstations are attached.

. These policies are similar to standard MAC address policies, but 

apply to the MAC addresses of DHCP client workstations only.

The default AutoTracker 

VLAN

, also referred to as 

VLAN #1

, is different from other AutoTracker 

VLAN

s. The following list outlines some of these differences.

1. The default 

VLAN

 is automatically created when you create a new Group. Non-default 

VLAN

s must be created through the 

 command. 

2. The default 

VLAN

 cannot be removed. Other 

VLANs

 can be removed through the 

 

command.

3. You cannot apply AutoTracker policies to the default 

VLAN

. Other non-default 

AutoTracker VLANs allow you to apply any policy to them. 

You can enable routing on the default VLAN. You enable the default VLAN virtual router 
through the 

 or 

 command. See Chapter 19, “Managing Groups and Ports,” for 

further information on the virtual router port on the default VLAN.

All ports and devices in a Group initially belong to default 

VLAN #1

. All physical switch ports 

always remain members of the default 

VLAN

, but they can also become members of other 

VLAN

s. It is not possible to delete a physical switch port from 

VLAN #1

. Individual network 

devices, however, can move out of 

VLAN #1

. All 

MAC

 devices are also initially part of default 

VLAN #1

. However, when a 

MAC

 device is removed from default 

VLAN #1

 and moved into a 

non-default 

VLAN

, it is deleted from default 

VLAN #1

.

The default VLAN is explained further in other sections of this chapter. See How Devices are 
Assigned to AutoTracker VLANs on page 22-5 for a discussion of default VLAN membership 
issues and the 

 command. Also, see Application Example 4 in Chapter 24, “AutoTracker 

VLAN Application Examples,” for discussions of routing issues and the default VLAN.