Cisco 1710 Specifications download pdf (Page 54)

Chapter 3 Overview of Routing Between Virtual LANs

VLAN Colors

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Cisco 1710 Security Router Software Configuration Guide

78-12696-01

Performance

The logical grouping of users allows an accounting group to make intensive use

of a networked accounting system assigned to a VLAN that contains just that

accounting group and its servers. That group’s work will not affect other users.

The VLAN configuration improves general network performance by not slowing

down other users sharing the network.

Network Management

The logical grouping of users allows easier network management. It is not

necessary to pull cables to move a user from one network to another. Adds,

moves, and changes are achieved by configuring a port into the appropriate

VLAN.

Communication Between VLANs

Communication between VLANs is accomplished through routing, and the

traditional security and filtering functions of the router can be used. Cisco IOS

software provides network services such as security filtering, quality of service

(QoS), and accounting on a per VLAN basis. As switched networks evolve to

distributed VLANs, Cisco IOS provides key inter-VLAN communications and

allows the network to scale.

VLAN Colors

VLAN switching is accomplished through frame tagging, in which traffic

originating and contained within a particular virtual topology carries a unique

VLAN identifier (VLAN ID) as it traverses a common backbone or trunk link.

The VLAN ID enables VLAN switching devices to make intelligent forwarding

decisions based on the embedded VLAN ID. Each VLAN is differentiated by a

color, or VLAN identifier. The unique VLAN ID determines the frame coloring

for the VLAN. Packets originating and contained within a particular VLAN carry

the identifier that uniquely defines that VLAN (by the VLAN ID).

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Cisco 1710 Specifications Page 54