Description of L2-SW functions
VLAN - Virtual network -
By setting up a virtual LAN (VLAN), it is possible to virtually divide a LAN into segments to create independent networks for individual businesses.
QoS - Quality of Service -
Quality of Service (QoS) involves the prioritization of communication that you do not want to stop, so that, even if the network load is high, a band is secured and the communication is not interrupted.
STP/RSTP -Redundancy function-
STP/RSTP (spanning tree) enables you to create multiple redundant paths,
so that in the event of a fault, the faulty equipment is bypassed so as not to affect the network.
Isolate -Completely blocks communication between condominium and other rooms-
Completely blocks inter-port communication and makes a connection to the Internet from an uplink port.
Ideal if you want to block communication between condominium, hotel, and other rooms.
Static LAG -Achieves a good balance between communication band improvement and redundancy-
Static LAG (link aggregation) makes it possible to have multiple ports appear to be a single port.
This improves the communication band according to the number of ports for which LAG is set. Even if one port is blocked,
communication is still possible with another port. Thus, a redundancy function is also offered.
LACP -Protocol control LAG-
LACP (Link Aggregation Control Protocol) configures LAG by using a protocol.
The difference from Static LAG is that it can be used even if there is a repeater such as a media converter between the switch HUBs.
IGMP snooping -Sends multicast to only those who need it-
IGMP snooping (Internet Group Management Protocol) distributes multicast from the distribution source to only those users who need it.
By not distributing multicast to those users who do not need it, prevents unnecessary traffic on the network.
When configuring a monitoring camera, you can operate it without applying an excessive network load because you can control the multicast.
Ring redundancy -Redundancy function-
By creating a network in a ring configuration, it is possible to bypass faulty locations in a simpler manner
and at a higher speed than in a conventional STP configuration.
An STP network
configuration is complicated.
It is possible to switch the line route within 100 ms of the occurrence of a fault.
Damage due to the network fault can be reduced.
Loop guard -Incorrect connection fault avoidance-
A loop detection packet is sent, any loop under a port is detected, and the port is automatically blocked.
This avoids a loop fault due to an incorrect LAN cable connection, thereby, preventing the network from shutdown.
In addition, it is also possible to detect any loop due to an incorrect connection of the local equipment and any loop due to an error in connecting to another switch, thereby preventing the network from shutting down.
PoE -Supply of power via a LAN cable-
The power is supplied to PoE-compliant (IEEE802.3af/IEEE802.3at) network equipment via a LAN cable. It is possible to create a network without the need for power supply work for PoE-compliant products such as IP phones and monitoring cameras.
PoE+PD -Operation with power supplied from PoE-SW-
It is possible to supply the power from PoE-SW to PD-SW via a LAN cable to operate PD-SW.
SNMP -Basic network monitoring function-
SNMP (Simple Network Management Protocol) enables you to check the switch HUB system information, as well as the link status and other port information, from a remote location.
It also enables you to send any status changes to the switch HUB itself to the SNMP manager as traps and notify the administrator by email.
Telnet/SSH -Executes command operations remotely-
• Telnet is a protocol that enables you to remotely operate the equipment connected to the network. (No encryption is applied.)
• SSH (Secure Shell) is a protocol for securely operating remote equipment with encryption applied.
WEB console -Easy setting with no need for commands-
Enables you to easily perform the same operations as command operations from a browser with no need to perform command-based operations.
DHCP -Automatically acquires IP addresses from a server-
DHCP (Dynamic Host Configuration Protocol) is for automatically acquiring IP addresses to be assigned to switches from a server. This can eliminate the need to set an IP address for one switch at a time.
NTP -Synchronizes the times of different items of network equipment-
NTP (Network Time Protocol) enables you to synchronize the time of the server with that of the switch HUB so that, in the event of a fault, the time information can be accurately recorded in the log.
Syslog/log storage -Sends log information to the server-
Syslog sends any switch HUB status changes to the Syslog server as log information.
This enables you to save Syslog log information to the switch HUB.
NAT -Global IP address translation-
NAT (Network Address Translation) enables you to translate a private IP into a global IP address, so that it can be shared among multiple terminals.
Even if additional terminals are added, the number of IP addresses being used remains unchanged, so that you can save IP addresses.
VPN -Network that does not affect end users-
It is possible to make an END to END connection from a VPN (Virtual Private Network) maintenance company and company A (on-site network), so that maintenance and operation can be performed safely with no leakage of information about company A's business network.
