AT-8100 Series Version 2.2.5.0 Web Interface User’s Guide
133
The VLAN information within an Ethernet frame is referred to as a
tag
or
tagged header
. A tag, which follows the source and destination addresses
in a frame, contains the VID of the VLAN to which the frame belongs (IEEE
802.3ac standard). This number uniquely identifies each VLAN in a
network.
When the switch receives a frame with a VLAN tag, referred to as a
tagged
frame
, the switch forwards the frame only to those ports that share the
same VID.
A port that receives or transmits tagged frames is referred to as a
tagged
port
. Any network device connected to a tagged port must be IEEE
802.1Q-compliant. This is the standard that outlines the requirements and
standards for tagging. The device must be able to process the tagged
information on received frames and add tagged information to transmitted
frames.
Tagged and
Untagged Ports
You need to specify which ports are members of the VLAN. In the case of
a tagged VLAN, it is usually a combination of both untagged ports and
tagged ports. You specify which ports are tagged and which are untagged
when you create the VLAN.
An untagged port, whether a member of a port-based VLAN or a tagged
VLAN, can be in only one VLAN at a time. However, a tagged port can be
a member of more than one VLAN. A port can also be an untagged
member of one VLAN and a tagged member of different VLANs
simultaneously.
Native VLAN
A tagged port supports traffic coming from multiple VLANs (tagged traffic)
as well as traffic that does not come from a VLAN (untagged traffic). If a
native VLAN is assigned to the tagged port, when the tagged port receives
untagged frames, it forwards those frames to the native VLAN.
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...