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Manual Documentation Number: EIR618-2SFP-T_5107m
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
X-Ring
X-Ring provides network redundancy similar to the Spanning Tree and
Rapid Spanning Tree Protocols. However, recovery time is greatly reduced
when the X-Ring protocol is used. The protocol identifies one switch as the
Ring Master. Packets are blocked from the redundant path unless a ring
member becomes disconnected from the rest of the network. When this
happens, the protocol automatically restores connectivity using the
redundant path.
In the X-Ring topology, every switch should enable X-Ring function and
assign two member ports to the ring. Only one switch in the X-Ring group
would be set as the backup switch. Other switches are called working
switches and their two member ports are called working ports. If a network
connection failure occurs, the backup port will automatically become a
working port to recover.
The switch can be set in the ring master or slave mode. The ring master
negotiates and places commands to the other switches in the X-Ring group.
If there are two or more switches in the master mode, the software will
select the switch with lowest MAC address number as the ring master. The
X-Ring master mode is enabled using the X-Ring configuration interface.
The Ring Master can also be identified using the R.M. LED on the front of
the switch.
The switch also supports coupling ring to connect two or more X-Ring
groups for redundant backup. The dual homing function is used to prevent a
connection lose between the X-Ring group and the upper level/core switch.
Enable X-Ring: Mark the check box to enable the X-Ring function.
Enable Ring Master: Mark the check box to set the switch as the Ring
Master.
1
st
& 2
nd
Ring Ports: Assign two ports as the member ports. 1
st
Ring
Port is the working port and 2
nd
Ring Port is the backup port. When 1
st
Ring Port fails, the system will automatically upgrade the 2
nd
Ring
Port to be the working port.