Planet GSW-2404SF [78/83] Forwarding filtering
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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.
5.5 Auto-Negotiation
The STP ports on the Switch have built-in “Auto-negotiation”. This technology automatically sets the best possible
bandwidth when a connection is established with another network device (usually at Power On or Reset). This is done by
detect the modes and speeds at the second of both device is connected and capable of, both 10Base-T and 100Base-TX
devices can connect with the port in either Half- or Full-Duplex mode. 1000Base-T can be only connected in Full-duplex
mode.
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Содержание
- 100 1000mbps 16 24 port web smart gigabit ethernet switch 1
- Gsw 1602sf gsw 2404sf gsw 2416sf 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 5
- Product specification 7
- Gsw 1602sf gsw 2404sf gsw 2416sf front panel 8
- Installation 8
- Product description 8
- Product overview 8
- Led color function 9
- Led indicators 9
- Lnk act 9
- Gsw 1602sf gsw 2404sf gsw 2416sf rear panel 10
- Desktop installation 11
- Install the gsw 1602sf 2404sf 2416sf 11
- Rack mounting 11
- Installing the sfp transceiver 12
- Management methods 14
- Overview 14
- Switch management 14
- Web management 14
- Login the switch 15
- Configuration 16
- Main menu 16
- System 17
- System info 17
- Misc configuration 18
- Port configuration 20
- Port mirroring 22
- Storm control 23
- Add a vlan group 25
- Vlan membership 25
- Modify the vlan group member 26
- Per port configuration 27
- Two separate 802 q vlan 29
- Vlan setting example 29
- Two vlans with overlap area 32
- Vlan trunking between two 802 q aware switch 34
- Rapid spanning tree 36
- Rstp system configuration 37
- Rstp port configuration 38
- Rstp status 39
- Link aggregation 43
- Port trunk 43
- Lacp status 46
- Igmp snooping 49
- Igmp snooping configuration 49
- Igmp snooping status 50
- Multicast group table 52
- Quality of service 53
- P qos mode 54
- Dscp qos mode 56
- X management 57
- Radius server configuration 58
- Port access control 60
- Filter configuration 62
- Dynamic address table 63
- Mac addresses 63
- Static mac address 64
- Factory reset 65
- Reboot 65
- Firmware upgrade 66
- Configuration upload 68
- Cable diagnostics 71
- 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 75
- Status 75
- Igmp snooping status 76
- Lacp status 76
- Multicast group status 76
- Rstp status 76
- Logout 77
- Address table 78
- Auto negotiation 78
- Forwarding filtering 78
- Learning 78
- Store and forward 78
- Switch operation 78
- Igmp snooping 79
- Igmp versions 1 and 2 79
- Theory 79
- Delaying member idle member 80
- Igmp state transitions 80
- Non member 80
- The states a computer will go through to join or to leave a multicast group are shown below 80
- Base tx port link led is lit but the traffic is irregular 81
- Performance is bad 81
- Some stations cannot talk to other stations located on the other port 81
- The link led is not lit 81
- Troubleshooting 81
- A 10 100mbps 10 100base tx 82
- A rj 45 cable pin assignment 82
- A switch s rj 45 pin assignments 82
- Appendix a 82
- A available modules 83
- The following list the available modules for gsw 1602sf gsw 2404sf gsw 2416sf 83
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