KTI Networks KS-2601 - Manual (Page 11)

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6. Manage / Configure the switch
6.1 Introduction of the management functions
This switch is a L2 management switch. It supports in-band management
function from SNMP, Http and Telnet interface. It also supports out-band
management function from RS232 console interface. Besides, it supports
network configuration functions, like VLAN, Trunking, Port Mirror, QoS, spanning
tree and software backup/update. Users can configure these functions for
different network applications. The following is a brief introduction about these
functions before the detail operation sections.
1. VLAN (Virtual LAN)
VLAN can divide the switch to several broadcast domains to prevent network
traffic between different user groups. This switch supports 802.1Q tag-based
VLAN and port-based VLAN. Users in the same VLAN can transfer data to
each other. The network traffic will be blocked if they are in different VLAN.
2. Trunk
If two switches are cascaded together, the bottleneck will happen at the
cascading connection. If more cables could be used for the cascading
connection, it will reduce the bottleneck problem. In normal case, switches
will become unstable because of traffic looping when more than one cable is
connected between them. If the switches support trunk function, they can treat
these cables as one connection between them. The traffic looping will not
happen between these cables and the switches will work stable with bigger
bandwidth between them.
This switch supports trunk function and users can configure it with the following
steps.
a. Enable trunk function.
b. Assign ports to a trunk. For example, assign Port 1,2,3 for Trunk 1.
Notes: About redundant application
The trunk connection supports redundant function. If any trunk cable is broken,
the traffic going through that cable will be transferred to another trunk cable
automatically. For example, if user port Port 6 is assigned to Port 1 in a Trunk
and Port 1 connection breaks, Port 2 will take over the traffic for Port 6
automatically. (It could be used for redundant application.)
3. Spanning Tree Protocol
Spanning tree is a protocol to prevent network loop in network topology. If
network loop happens, it will cause switches in the network unstable because
more and more traffic will loop in the network. If network loop happens,
spanning tree protocol will block one connection in the loop automatically. But
it will also cause a 30 seconds delay if any network connection is changed
because of the network topology detection operation of the protocol.
Because there could be more than one switch in the network, users can
configure this function for their network spanning tree application.