Planet GSD-802PS [82/87] Address table
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User’s Manual of GSD-800S / GSD-802S / GSD-802PS
5. SWITCH OPERATION
5.1 Address Table
The Switch is implemented with an address table. This address table composed of many entries. Each entry is used to
store the address information of some node in network, including MAC address, port no, etc. This information comes from
the learning process of Ethernet Switch.
5.2 Learning
When one packet comes in from any port, the Switch will record the source address, port no. And the other related
information in address table. This information will be used to decide either forwarding or filtering for future packets.
5.3 Forwarding & Filtering
When one packet comes from some port of the Ethernet Switching, it will also check the destination address besides the
source address learning. The Ethernet Switching will lookup the address-table for the destination address. If not found,
this packet will be forwarded to all the other ports except the port, which this packet comes in. And these ports will transmit
this packet to the network it connected. If found, and the destination address is located at different port from this packet
comes in, the Ethernet Switching will forward this packet to the port where this destination address is located according to
the information from address table. But, if the destination address is located at the same port with this packet comes in,
then this packet will be filtered. There by increasing the network throughput and availability.
5.4 Store-and-Forward
Store-and-Forward is one type of packet-forwarding techniques. A Store-and-Forward Ethernet Switching stores the
incoming frame in an internal buffer, do the complete error checking before transmission. Therefore, no error packets
occurrence, it is the best choice when a network needs efficiency and stability.
The Ethernet Switch scans the destination address from the packet-header, searches the routing table provided for the
incoming port and forwards the packet, only if required. The fast forwarding makes the switch attractive for connecting
servers directly to the network, thereby increasing throughput and availability. However, the switch is most commonly
used to segment existing hubs, which nearly always improves overall performance. An Ethernet Switching can be easily
configured in any Ethernet network environment to significantly boost bandwidth using conventional cabling and adapters.
Due to the learning function of the Ethernet switching, the source address and corresponding port number of each
incoming and outgoing packet are stored in a routing table. This information is subsequently used to filter packets whose
destination address is on the same segment as the source address. This confines network traffic to its respective domain,
reducing the overall load on the network.
The Switch performs "Store and forward" therefore, no error packets occur. More reliably, it reduces the re-transmission
rate. No packet loss will occur.
Содержание
- Gsd 800s gsd 802s 1
- Gsd 802ps 1
- Port gigabit web smart ethernet switch 1
- Port gigabit web smart poe switch 1
- User s manual 1
- Ce mark warning 2
- Disclaimer 2
- Fcc warning 2
- Revision 2
- Trademarks 2
- Weee warning 2
- Table of contents 3
- How to use this manual 5
- Introduction 5
- Package contents 5
- Product features 6
- Product specification 7
- Installation 9
- Product description 9
- Product overview 9
- Led indicators 10
- Switch front panel 10
- Switch rear panel 11
- Desktop installation 12
- Install the switch 12
- Rack mounting 13
- Installing the sfp transceiver 14
- Management methods 16
- Overview 16
- Switch management 16
- Web management 16
- Login the switch 17
- Configuration 18
- Main menu 18
- System 20
- System info 20
- Misc configuration 21
- Port configuration 23
- Port mirroring 25
- Vlan membership 27
- Per port configuration 30
- Vlan setting example 32
- Rapid spanning tree 40
- Rstp system configuration 41
- Rstp port configuration 42
- Rstp status 43
- Link aggregation 46
- Port trunk 46
- Lacp status 49
- Igmp snooping 51
- Igmp snooping configuration 51
- Igmp snooping status 52
- Multicast group table 54
- Quality of service 55
- P qos mode 56
- Dscp qos mode 58
- X management 59
- Radius server configuration 60
- Port access control 62
- Dynamic address table 64
- Mac addresses 64
- Static mac address 65
- Factory reset 66
- Reboot 66
- Firmware upgrade 67
- Configuration upload 68
- Cable diagnostics 71
- Ω differential impedance between the positive and negative cable terminals ieee std 802 allows for a termination of as large as 115ω or as small as 85ω if the termination falls out of this range it is reported as falls an anomalous termination 72
- Web smart function 73
- Port statistics 77
- Status 77
- Igmp snooping status 78
- Lacp status 78
- Logout 78
- Multicast group status 78
- Rstp status 78
- Poe configuration gsd 802ps only 80
- Address table 82
- Forwarding filtering 82
- Learning 82
- Store and forward 82
- Switch operation 82
- 6 igmp snooping 83
- Auto negotiation 83
- Igmp snooping 83
- Igmp versions 1 and 2 83
- Theory 83
- Base tx port link led is lit but the traffic is irregular 85
- Performance is bad 85
- Some stations cannot talk to other stations located on the other port 85
- The link led is not lit 85
- Troubleshooting 85
- A 10 100mbps 10 100base tx 86
- A switch s rj 45 pin assignments 86
- Appendix a 86
- A rj 45 cable pin assignment 87
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