Switch, Ethernet Switch, Level 3 Switch, Router, MAC address table, Port Mirroring, Simple Network Management Protocol SNMP, Spanning Tree Protocol STP, Store and Forward, Cut Through
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Abstract
A detailed overview of switches, their role in networking, types, and operational modes.
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[...] The box strangely resembles a concentrator. IN AN IP/Ethernet NETWORK In this network, the switch will have no interest in the same OSI layer as the router. It will disinterest itself. Both of them use MAC addresses and IP addresses to direct data. For a known or partially known address, a frame is always sent regardless of what happens on the same port, regardless of the traffic state, once its routing and communication tables are filled. The router searches for the best route to take, which can have an impact on large networks, on which it will generate less traffic. [...]
[...] This is a compromise compared to the two other methods. - AUTOMATIC COMMUTATION (ADOPTIVE SWITCHING) : Compared to the number of errors that could be detected, the switch automatically chooses one of the three modes mentioned above. Each method is used according to precise criteria. ADDITIONAL FUNCTIONS Other functions come in addition, here they are : - SIMPLE NETWORK MANAGEMENT PROTOCOL (SNMP) : This protocol allows for remote interrogation of a network device. It supervises the network and allows for interrogation of network devices in the recovery of measurements performed by the device. [...]
[...] If the destination port is identical to that of the sender, no frame can be transmitted. When the recipient's address is unknown in the table, the frame is treated as a broadcast, that is, it is transmitted to each port of the switch except the emission port. Regarding the level 2 switch, it is the same as the concentrator because it also provides a single broadcast domain. On the other hand, each port has its own collision domain. Micro-segmentation is used by the switch to divide the collision domains, one per connected segment. [...]
[...] - SHORTEST PATH BRIDGING (SPB) : specified by the IEEE 802.1aq standard. - SPANNING TREE PROTOCOL (STP) : This protocol allows to avoid loops in a network of interconnected switches. - VIRTUAL LOCAL AREA NETWORKS (VLAN) CONFIGURABLES. - DOT1Q : passage of several VLANs on the same link. - LINK AGGREGATION CONTROL PROTOCOL (LACP): Dynamic link aggregation. - IGMP SNOOPING and MLD SNOOPING : multicast distribution optimization. - IGMP QUERYING : identification of active multicast groups. - AGGREGATION OF LINKS TO INCREASE THE THROUGHPUT BETWEEN TWO POINTS. - DOT1X : authentication of ports. [...]
[...] - QOS : differential frame processing. - PORT MIRRORING (PORT MIRROR) : Replication of traffic from one port or VLAN to another port. - JUMBO FRAME INCREASING FRAME SIZE TO 9000 BYTES OR MORE. DIFFERENT TYPES OF SWITCHES: - Ethernet Switch. - FC Switch in Storage Area Network (SAN) environment. - Front-end switch (FEP, communication controller). - FR Switch. - X.25 Switch. - ATM Switch. - Telephone Switch (Autocommuter, PABX, PBX). - Level 3 Switch or Router. [...]
