Figure 2-7 displays the various VLAN membership modes.
Figure 2-7 VLAN Membership Modes
The VLAN membership mode Characteristics of Cisco Catalyst switch ports are as follows:
?– Static VLAN: An administrator statically con?¬?gures the assignment of VLANs to
ports.
?– Dynamic VLAN: Cisco Catalyst switches support dynamic VLANs using a VLAN
Membership Policy Server (VMPS). Some Cisco Catalyst switches can be designated
as the VMPS; you can also designate an external server as the VMPS. The VMPS
contains a database that maps MAC addresses to VLAN assignments. When a frame
arrives at a dynamic port on the Cisco Catalyst access switch, the switch queries the
VMPS server for the VLAN assignment based on the source MAC address of the
arriving frame. A dynamic port can belong to only one VLAN at a time. Multiple hosts
can be active on a dynamic port only if they belong to the same VLAN.
?– Voice VLAN: A voice VLAN port is an access port attached to a Cisco IP phone,
con?¬?gured to use one VLAN for voice traf?¬?c and another VLAN for data traf?¬?c.
Understanding Trunking with 802.1Q
A trunk is a point-to-point link between one or more Ethernet switch interfaces and another
networking device such as a router or a switch.
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