Alcatel Carrier Internetworking Solutions Switch/Router 用户手册

Page 24-2

Example 1 shows a network organized logically. The network is organized according to 

IP

 

networks, but this organization is achieved through the application of logical policies rather 
than physical segmentation. The use of logical policies provides the flexibility of moving 

IP

 

users from segment to segment and preserving their original 

VLAN

 membership – without 

reconfiguring AutoTracker or the workstations.

The network shown in Example 1 contains one Group – Group 2 – that consists of ports 1, 2, 
3, and 4. Note that a Group defines a physical area – a set of ports – within the network. 
When 

VLAN

s with logical policies are created within a Group, the logical policies are applied 

to traffic received from all ports within the Group – but not to traffic from ports outside the 
Group – to determine if any source device should be a 

VLAN

 member.

As shown on the facing page, two 

VLAN

s were created within Group 2, each with a logically-

based Network Address policy. The Network Address policy for 

VLAN

 A defines 

IP

 network 

125.0.0.0 and the Network Address policy for 

VLAN

 B defines 

IP

 network 130.0.0.0. All traffic 

received on ports 1, 2, 3, and 4 will be checked for possible membership in these two 

VLAN

s.

Routing was enabled on both 

VLAN

 A and 

VLAN

 B so that traffic can move between the two 

VLAN

s, as is shown in this example by the presence of the internal 

IP

 router. 

This network configuration shown in this example provides flexibility. As explained on the 
following page, this logical network organization enables the Network Manager to move 

IP

 

users between segments while preserving their original 

VLAN

 membership – without reconfig-

uring AutoTracker or the workstations.