Chapter 11: Setting Port-based and Tagged VLANs
132
Overview
A VLAN is a group of ports that form a logical Ethernet segment on an
Ethernet switch. The ports of a VLAN form an independent broadcast
domain in which the traffic generated by the nodes remains within the
VLAN.
VLANs let you segment your network through the switch’s management
software so that you can group nodes with related functions into their own
separate, logical LAN segments. These VLAN groupings can be based on
similar data needs or security requirements. For example, you can create
separate VLANs for the different departments in your company, such as
one for Sales and another for Accounting. Setting port-based and tagged
VLANs is supported via the web interface.
Port-based
VLANs
A port-based VLAN is a group of ports on an Ethernet switch that form a
logical Ethernet segment. Each port of a port-based VLAN can belong to
only one VLAN at a time. A port-based VLAN can have as many or as few
ports as needed. The VLAN can consist of all the ports on an Ethernet
switch, or just a few ports. In addition, a port-based VLAN can span
switches and consist of ports from multiple Ethernet switches.
Ports in a port-based VLAN are referred to as
untagged ports
and the
frames received on the ports as
untagged frames
. The names derive from
the fact that the frames received on a port do not contain any information
that indicates VLAN membership, and that VLAN membership is
determined solely by a port’s port VLAN identifier (PVID).
Port VLAN
Identifier
Each port in a port-based VLAN must have a PVID. The switch associates
a frame to a port-based VLAN by the PVID assigned to a port on which a
frame is received, and forwards a frame only to those ports with the same
PVID. Consequently, all ports of a port-based VLAN must have the same
PVID. In addition, the PVID of the ports in a VLAN must match the VLAN’s
VID.
For example, if you create a port-based VLAN on the switch and assign it
the VID 5, the PVID for each port in the VLAN must be assigned the value
of 5.
Tagged VLANs
The second type of VLAN is the tagged VLAN. VLAN membership in a
tagged VLAN is determined by information within the frames that are
received on a port. This differs from a port-based VLAN, where the PVIDs
assigned to the ports determine VLAN membership.
Содержание AT-8100L/8POE
Страница 4: ......
Страница 10: ...Contents 10...
Страница 14: ...Figures 14...
Страница 22: ...Chapter 1 AT 8100 Series Version 2 2 5 0 Web Browser Interface 22...
Страница 84: ...Chapter 5 Setting Port Statistics 84...
Страница 90: ...Chapter 6 Port Mirroring 90 6 Click Apply 7 Click SAVE to save your changes to the startup configuration file...
Страница 92: ...Chapter 6 Port Mirroring 92...
Страница 100: ...Chapter 7 Spanning Tree Protocol on a Port 100...
Страница 120: ...Chapter 9 Link Aggregation Control Protocol LACP 120...
Страница 130: ...Chapter 10 Setting Static Port Trunks 130...
Страница 148: ...Chapter 12 Spanning Tree Protocols on the Switch 148...
Страница 158: ...Chapter 13 Internet Group Management Protocol IGMP Snooping 158...
Страница 168: ...Chapter 14 IGMP Snooping Querier 168...
Страница 178: ...Chapter 15 Power Over Ethernet PoE 178...
Страница 230: ...Chapter 19 Setting IPv4 and IPv6 Addresses 230...
Страница 242: ...Chapter 20 Access Control Lists ACL 242...
Страница 246: ...Chapter 21 Setting Static Routes 246 8 Click Apply 9 Click SAVE...
Страница 250: ...Chapter 21 Setting Static Routes 250...
Страница 319: ...AT 8100 Series Version 2 2 5 0 Web Interface User s Guide 319 Model Name Asset ID...
Страница 320: ...Chapter 25 LLDP and LLDP MED 320...