WGSW-Series (V3) User Manual
Table Of Contents
- 1. INTRODUCTION
- 2. INSTALLATION
- 3. SWITCH MANAGEMENT
- 4. WEB CONFIGURATION
- 4.1 Main Web Page
- 4.2 System
- 4.2.1 Management
- 4.2.1.1 System Information
- 4.2.1.2 IP Configuration
- 4.2.1.3 IP Status
- 4.2.1.4 ARP Configuration
- 4.2.1.5 Users Configuration
- 4.2.1.6 Privilege Levels
- 4.2.1.7 NTP Configuration
- 4.2.1.7.1 System Time Correction Manually
- 4.2.1.8 Time Configuration
- 4.2.1.9 UPnP
- 4.2.1.10 DHCP Relay
- 4.2.1.11 DHCP Relay Statistics
- 4.2.1.12 CPU Load
- 4.2.1.13 System Log
- 4.2.1.14 Detailed Log
- 4.2.1.15 Remote Syslog
- 4.2.1.16 SMTP Configuration
- 4.2.2 Simple Network Management Protocol
- 4.2.3 RMON
- 4.2.4 DHCP server
- 4.2.5 Remote Management
- 4.2.1 Management
- 4.3 Switching
- 4.3.1 Port Management
- 4.3.2 Link Aggregation
- 4.3.3 VLAN
- 4.3.3.1 VLAN Overview
- 4.3.3.2 IEEE 802.1Q VLAN
- 4.3.3.3 VLAN Port Configuration
- 4.3.3.4 VLAN Membership Status
- 4.3.3.5 VLAN Port Status
- 4.3.3.6 Private VLAN
- 4.3.3.7 Port Isolation
- 4.3.3.8 VLAN setting example:
- 4.3.3.8.1 Two Separate 802.1Q VLANs
- 4.3.3.8.2 VLAN Trunking between two 802.1Q aware switches
- 4.3.3.8.3 Port Isolate
- 4.3.3.9 MAC-based VLAN
- 4.3.3.10 IP Subnet-based VLAN
- 4.3.3.11 Protocol-based VLAN
- 4.3.3.12 Protocol-based VLAN Membership
- 4.3.4 VLAN Translation
- 4.3.5 Spanning Tree Protocol
- 4.3.6 Multicast
- 4.3.6.2 Profile Table
- 4.3.7 MLD Snooping
- 4.3.8 MVR (Multicast VLAN Registration)
- 4.3.9 LLDP
- 4.3.10 MAC Address Table
- 4.3.11 Loop Protection
- 4.3.12 UDLD
- 4.3.13 GVRP
- 4.4 Quality of Service
- 4.5 Security
- 4.6 Power over Ethernet (For WGSW-20160HP/WGSW-24040HP_24040HP4)
- 4.7 ONVIF
- 4.8 Maintenance
- 4.8.1 Web Firmware Upgrade
- 4.8.2 Save Startup Config
- 4.8.3 Configuration Download
- 4.8.4 Configuration Upload
- 4.8.5 Configure Activate
- 4.8.6 Configure Delete
- 4.8.7 Image Select
- 4.8.8 Factory Default
- 4.8.9 System Reboot
- 4.8.10 Ping
- 4.8.11 IPv6 Ping
- 4.8.12 Remote IP Ping
- 4.8.13 Cable Diagnostics
- 4.8.14 Traceroute (IPv4)
- 4.8.15 Traceroute (IPv6)
- 5. SWITCH OPERATION
- APPENDIX A: Networking Connection
User’s Manual of WGSW Series Managed Switch
126
■ 802.1Q VLAN Tags
The figure below shows the 802.1Q VLAN tag. There are four additional octets inserted after the source MAC address. Their
presence is indicated by a value of 0x8100 in the Ether Type field. When a packet's Ether Type field is equal to 0x8100, the
packet carries the IEEE 802.1Q/802.1p tag. The tag is contained in the following two octets and consists of 3 bits of user priority,
1 bit of Canonical Format Identifier (CFI - used for encapsulating Token Ring packets so they can be carried across Ethernet
backbones), and 12 bits of VLAN ID (VID). The 3 bits of user priority are used by 802.1p. The VID is the VLAN identifier and is
used by the 802.1Q standard. Because the VID is 12 bits long, 4094 unique VLAN can be identified.
The tag is inserted into the packet header making the entire packet longer by 4 octets. All of the information originally contained
in the packet is retained.
802.1Q Tag
User Priority CFI VLAN ID (VID)
3 bits 1 bit 12 bits
TPID (Tag Protocol Identifier) TCI (Tag Control Information)
2 bytes 2 bytes
Preamble Destination
Address
Source
Address
VLAN TAG Ethernet
Type
Data FCS
6 bytes 6 bytes 4 bytes 2 bytes 46-1500 bytes 4 bytes
The Ether Type and VLAN ID are inserted after the MAC source address, but before the original Ether Type/Length or Logical
Link Control. Because the packet is now a bit longer than it was originally, the Cyclic Redundancy Check (CRC) must be
recalculated.
Adding an IEEE802.1Q Tag
Dest. Addr. Src. Addr. Length/E. type Data Old CRC
Dest. Addr. Src. Addr. E. type Tag Length/E. type Data New CRC
Priority CFI VLAN ID
■ Port VLAN ID
Packets that are tagged (are carrying the 802.1Q VID information) can be transmitted from one 802.1Q compliant network
device to another with the VLAN information intact. This allows 802.1Q VLAN to span network devices (and indeed, the entire
network – if all network devices are 802.1Q compliant).
Every physical port on a switch has a PVID. 802.1Q ports are also assigned a PVID, for use within the switch. If no VLAN are
Original Ethernet
New Tagged Packet