B&B Electronics EIR618-2SFP-T manual Ring

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.

„1st & 2nd Ring Ports: Assign two ports as the member ports. 1st Ring Port is the working port and 2nd Ring Port is the backup port. When 1st Ring Port fails, the system will automatically upgrade the 2nd Ring Port to be the working port.

92	Manual Documentation Number: EIR618-2SFP-T_5107m
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