Alcatel Carrier Internetworking Solutions Switch/Router ユーザーズマニュアル

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 How Ports Are Assigned to Groups
Page 19-3
How Dynamic Port Assignment Works
Initially each port is assigned to the default Group. In this example, all three ports have work-
stations that belong to three different 
IP
 subnets (130.0.0.0, 138.0.0.0, and 140.0.0.0). All three 
ports start out in the default Group.
Group Mobility examines traffic coming from OmniS/R ports. Three mobile groups are 
defined on the switch and each uses a different IP policy. Traffic that matches IP policies for a 
Group will trigger the movement of the port to the matching Group.
Initial Configuration: All Ports in Default Group
As soon as the workstations start transmitting traffic, Group Mobility checks the source subnet 
of the frames and looks for a match with any configured IP policies. If a match is found—and 
in this example all three ports can be matched with a corresponding Group—the port is 
moved to the matching Group.
Devices matching a policy trigger the assignment of a port to a mobile group. Therefore, the 
device is moved to the mobile group at the same time as the port to which it is attached. If 
more than one device comes in on a port, then that port can belong to more than one mobile 
group. Similarly, if a device transmits more than one protocol—such as IP and IPX—then the 
port to which it is attached can belong to more than one mobile group.
OmniS/R
12345678
123456
Port 2
Group 2
Group 1
Group 4
IP
 Network 130.0.0.0
Default Group
IP
 Network 140.0.0.0
Port 1
130.0.0.1
138.0.0.5
140.0.0.3
Group 3
IP
 Network 138.0.0.0
Port 3