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network administrator can manage, control and monitor the
switch from the console program.
The VH-8G-L3 contains a CPU, memory for data storage,
flash memory for configuration data, operational programs,
and SNMP agent firmware. These components allow the
switch to be actively managed and monitored from either the
console port or the network itself (out-of-band, or in-band).
SNMP Management
The Simple Network Management Protocol (SNMP) is an
OSI layer 7 (the application layer) protocol for remotely
monitoring and configuring network devices. SNMP enables
network management stations to read and modify the
settings of gateways, routers, switches, and other network
devices. SNMP can be used to perform many of the same
functions as a directly connected console, or can be used
within an integrated network management software package
such as NetSight.
Flow Control
The VH-8G-L3 supports flow control (back pressure
handling) on a per-port basis. The limit at which flow control
is applied to a port is based on the amount of memory used
by the packets on an input port.
•
802.3x Flow Control – if the port is configured in full
duplex mode, a MAC PAUSE packet is sent to inhibit the
flow of packets to the port for a short amount of time.
Spanning Tree Protocol
The VH-8G-L3 switch complies with the IEEE 802.1D
Spanning Tree Protocol standard and allows for the blocking
of links between switches that form loops within the network.
When multiple links between switches are detected, a
primary link is established. Duplicated links are blocked from
use and become standby links. The protocol allows for the
duplicate links to be used in the event of a failure of the
