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CLI
8.1.4
8.1.5
238
Subnet-based VLAN
An IP address contains two parts: a subnet identifier and a station identifier. The switch
performs two operations to create IP subnet-based VLANs.
Parse the protocol type to determine if the frame encapsulates an IP datagram.
•
Examine and extract the IP subnet portion of the IP Source Address in the encapsu-
•
lated datagram.
Once it is known that a given frame carries an IP datagram belonging to a given subnet,
the switch can transmit the frame as needed within the confines of the subnet to which it
belongs. If a device with a given IP address moves within the VLAN-aware network, the
boundaries of its IP subnet can automatically adjust to accommodate the station's ad-
dress.
VLAN 1
IP Subnet 192.168.10.0
Fig. 8.2
Subnet-based VLAN
To configure subnet-based VLAN, use the following command.
Command
vlan subnet A.B.C.D/M VLANS
To clear subnet-based VLAN configuration, use the following command.
Command
no vlan subnet [A.B.C.D/M]
Tagged VLAN
In a VLAN environment, a frame's association with a given VLAN is soft; the fact that a
given frame exists on some physical cable does not imply its membership in any particu-
lar VLAN. VLAN association is determined by a set of rules applied to the frames by
VLAN-aware stations and/or switches.
VLAN 2
IP Subnet 192.168.20.0
Mode
Configures subnet based VLAN.
Bridge
VLANS: VLAN ID (1-4094)
Mode
Bridge
Clears configured VLAN based on subnet.
Management Guide
TigerAccess™ EE
VLAN 3
IP Subnet 192.168.30.0
Description
Description
SMC7824M/VSW
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