VLANs and the Logical Network

Systems, Inc. All rights reserved.

When mapping VLANs onto the new hierarchical network design, keep these parameters in mind.

■ Examine the subnetting scheme that has been applied to the network and associate a VLAN to each subnet.

■ Configure routing between VLANs at the distribution layer using multilayer switches.

■ Make end-user VLANs and subnets local to a specific switch block.

■ Ideally, limit a VLAN to one access switch or switch stack. However, it may be necessary to extend a VLAN across multiple access switches within a switch block to support a capability such as wireless mobility.

© 2006 Cisco Systems, Inc. Defining VLANs 2-13

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