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ring. Only one switch in the X-Ring group would be set as a backup switch, and one of its two member ports
on this backup switch would be blocked, called the backup port, while the other member port is called a
working port. Other switches are called working switches and their two member ports are called working
ports. When the network connection fails, the backup port will automatically become a working port to
resume the connection.
HME-421E/423E has a R.M DIP switch on is front panel that would allow the administrator to configure this
switch as the Ring Master or not. When the switch is set to be the Ring Master, the X-Ring configuration
screen will display a message saying this switch is the Ring Master. The Ring Master will be responsible for
negotiating and placing commands to other switches in the X-Ring group. If by accident there are 2 or more
switches are being configured as the Ring Master, then the software will automatically select the switch with
the lowest MAC address number as the Ring Master.
HME-421E/423E also supports Couple Ring, a power management function that allows 2 or more X-Ring
groups to be connected to each other to offer more advanced redundancy. Dual Homing function is another
advanced management feature that HME-421E/423E offers, an advanced redundancy network solution by
connecting switches running in different redundant protocols such as IEEE 802.1w Rapid Spanning Tree
Protocol and X-Ring to extend the network redundant coverage. HME-421E/423E also comes with a new
advanced ring redundancy feature called Dual Ring. Dual Ring can handle 2 rings in the system and has the
ability to recover from failure within 20 milliseconds.
Enable Ring
This feature allows the administrator o enable the X-Ring function. Mark
the check box to enable the X-Ring function.
1st & 2nd Ring Ports
This feature allows the administrator to assign two ports as the X-Ring
group member ports. One of the ports will be the working port and the
other port will be the backup port. The switch will automatically decide
which port is the working port and which port is the backup port.
Enable Couple Ring
This feature allows the administrator to enable the Couple Ring function.
Mark the check box to enable the Couple Ring function.
Couple Port This feature allows the administrator to assign the member port.
Control Port
This feature allows the administrator to set the switch as the master
switch in a Couple Ring topology.
Enable Dual Homing
This feature allows the administrator to set up one of the ports on the
switch to be the Dual Homing port. In an X-Ring group, maximum number
of Dual Homing ports is one. Dual Homing will only work when the X-Ring
function is enabled.
Homing Port
This feature allows the administrator to decide which port to be used as
working port in a Dual Homing topology.
Enable Dual Ring
This feature allows the administrator o enable the Dual Ring function.
Mark the check box to enable the Dual Ring function. The difference
between Dual Ring and Couple Ring is that Dual Ring only needs a unit
to form a redundant connection of two rings.
After finishing necessary configurations, click on Apply to save the settings.