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Software Configuration Guide—Release 12.2(25)EW
OL-6696-01
Chapter 10 Understanding and Configuring VLANs
Overview of VLANs
Figure 10-1 Sample VLANs
VLANs are often associated with IP subnetworks. For example, all of the end stations in a particular IP
subnet belong to the same VLAN. Traffic between VLANs must be routed. You must assign LAN
interface VLAN membership on an interface-by-interface basis (this is known as interface-based or
static VLAN membership).
You can set the following parameters when you create a VLAN in the management domain:
• VLAN number
• VLAN name
• VLAN type
• VLAN state (active or suspended)
• Maximum transmission unit (MTU) for the VLAN
• Security Association Identifier (SAID)
• VLAN number to use when translating from one VLAN type to another
Note When the software translates from one VLAN type to another, it requires a different VLAN number for
each media type.
Floor 1
Floor 2
Engineering
VLAN
Cisco router
Fast
Ethernet
Floor 3
Marketing
VLAN
Accounting
VLAN
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