![ZyXEL Communications GS2200-24 Series Скачать руководство пользователя страница 88](http://html.mh-extra.com/html/zyxel-communications/gs2200-24-series/gs2200-24-series_user-manual_945727088.webp)
Chapter 9 VLAN
GS2200-24 User’s Guide
88
dynamically through GVRP. The VLAN ID associates a frame with a specific VLAN
and provides the information that switches need to process the frame across the
network. A tagged frame is four bytes longer than an untagged frame and
contains two bytes of TPID (Tag Protocol Identifier, residing within the type/length
field of the Ethernet frame) and two bytes of TCI (Tag Control Information, starts
after the source address field of the Ethernet frame).
The CFI (Canonical Format Indicator) is a single-bit flag, always set to zero for
Ethernet switches. If a frame received at an Ethernet port has a CFI set to 1, then
that frame should not be forwarded as it is to an untagged port. The remaining
twelve bits define the VLAN ID, giving a possible maximum number of 4,096
VLANs. Note that user priority and VLAN ID are independent of each other. A
frame with VID (VLAN Identifier) of null (0) is called a priority frame, meaning
that only the priority level is significant and the default VID of the ingress port is
given as the VID of the frame. Of the 4096 possible VIDs, a VID of 0 is used to
identify priority frames and value 4095 (FFF) is reserved, so the maximum
possible VLAN configurations are 4,094.
9.3.2 Forwarding Tagged and Untagged Frames
Each port on the Switch is capable of passing tagged or untagged frames. To
forward a frame from an 802.1Q VLAN-aware switch to an 802.1Q VLAN-unaware
switch, the Switch first decides where to forward the frame and then strips off the
VLAN tag. To forward a frame from an 802.1Q VLAN-unaware switch to an 802.1Q
VLAN-aware switch, the Switch first decides where to forward the frame, and then
inserts a VLAN tag reflecting the ingress port's default VID. The default PVID is
VLAN 1 for all ports, but this can be changed.
A broadcast frame (or a multicast frame for a multicast group that is known by the
system) is duplicated only on ports that are members of the VID (except the
ingress port itself), thus confining the broadcast to a specific domain.
9.3.3 Automatic VLAN Registration
GARP and GVRP are the protocols used to automatically register VLAN
membership across switches.
9.3.4 GARP
GARP (Generic Attribute Registration Protocol) allows network switches to register
and de-register attribute values with other GARP participants within a bridged
TPID
2 Bytes
User Priority
3 Bits
CFI
1 Bit
VLAN ID
12 bits
Содержание GS2200-24 Series
Страница 2: ......
Страница 8: ...Safety Warnings GS2200 24 User s Guide 8 ...
Страница 22: ...Table of Contents GS2200 24 User s Guide 22 ...
Страница 24: ...24 ...
Страница 30: ...Chapter 1 Getting to Know Your Switch GS2200 24 User s Guide 30 ...
Страница 34: ...Chapter 2 Hardware Installation and Connection GS2200 24 User s Guide 34 ...
Страница 42: ...42 ...
Страница 70: ...Chapter 7 System Status and Port Statistics GS2200 24 User s Guide 70 ...
Страница 84: ...Chapter 8 Basic Setting GS2200 24 User s Guide 84 ...
Страница 86: ...86 ...
Страница 104: ...Chapter 9 VLAN GS2200 24 User s Guide 104 Figure 51 Port Based VLAN Setup Port Isolation ...
Страница 110: ...Chapter 10 Static MAC Forward Setup GS2200 24 User s Guide 110 ...
Страница 138: ...Chapter 13 Spanning Tree Protocol GS2200 24 User s Guide 138 ...
Страница 142: ...Chapter 14 Bandwidth Control GS2200 24 User s Guide 142 ...
Страница 146: ...Chapter 15 Broadcast Storm Control GS2200 24 User s Guide 146 ...
Страница 150: ...Chapter 16 Mirroring GS2200 24 User s Guide 150 ...
Страница 160: ...Chapter 17 Link Aggregation GS2200 24 User s Guide 160 ...
Страница 168: ...Chapter 19 Port Security GS2200 24 User s Guide 168 ...
Страница 180: ...Chapter 21 Policy Rule GS2200 24 User s Guide 180 ...
Страница 192: ...Chapter 23 VLAN Stacking GS2200 24 User s Guide 192 ...
Страница 214: ...Chapter 25 AAA GS2200 24 User s Guide 214 ...
Страница 240: ...Chapter 26 IP Source Guard GS2200 24 User s Guide 240 ...
Страница 250: ...Chapter 28 Layer 2 Protocol Tunneling GS2200 24 User s Guide 250 ...
Страница 251: ...251 PART IV IP Application Static Route 253 Differentiated Services 257 DHCP 261 ...
Страница 252: ...252 ...
Страница 256: ...Chapter 29 Static Route GS2200 24 User s Guide 256 ...
Страница 270: ...270 ...
Страница 300: ...Chapter 33 Access Control GS2200 24 User s Guide 300 ...
Страница 306: ...Chapter 35 Syslog GS2200 24 User s Guide 306 ...
Страница 314: ...Chapter 36 Cluster Management GS2200 24 User s Guide 314 ...
Страница 318: ...Chapter 37 MAC Table GS2200 24 User s Guide 318 ...
Страница 323: ...323 PART VI Troubleshooting Product Specifications Troubleshooting 325 Product Specifications 329 ...
Страница 324: ...324 ...
Страница 336: ...Chapter 41 Product Specifications GS2200 24 User s Guide 336 ...
Страница 337: ...337 PART VII Appendices and Index Changing a Fuse 339 Common Services 341 Legal Information 345 Index 349 ...
Страница 338: ...338 ...
Страница 340: ...Appendix A Changing a Fuse GS2200 24 User s Guide 340 ...
Страница 348: ...Appendix C Legal Information GS2200 24 User s Guide 348 ...
Страница 358: ...Index GS2200 24 User s Guide 358 ...