Alcatel Omni Switch/Router, User Manual

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Application Example 1
Page 24-2
Application Example 1
VLAN
s Based on Logical Policies
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.
Group and
VLAN
Membership
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.
Benefits
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.