User`s manual

TN-5516/5518 Series Featured Functions
3-23
Determining the Redundant Path for Turbo Ring V2
Master
For Turbo Ring V2, the backup segment is the
segment connected to the 2nd redundant port on the
master.
Please refer to Configuring Turbo Ring V2 later in this
chapter.
Ring Coupling Configuration
For some systems, it may not be convenient to connect all devices in the system in a single redundant ring,
since some devices could be located in a remote area. For these systems, Ring Coupling can be used to group
devices into smaller redundant rings that communicate with each other.
ATTENTION
In a VLAN environment, the user must set Redundant Port Coupling Port and Coupling Control Port to join all
VLANs, since these ports act as the backbone to transmit all packets of different VLANs to the different TN
series Ethernet switches.
Ring Coupling for Turbo Ring
Switch B
Switch A: Coupler
Switch D
Switch C
Main Path
Coupling
Control Port
Coupling Port
Backup Path
To configure the ring coupling for a Turbo Ring, select two TN series Ethernet switches (e.g., Switch A and B
in the above figure) in the ring, and another two TN series Ethernet switches in the adjacent ring (e.g., Switch
C and D).
Select two ports on each switch to be used as coupling ports and link them together. Next, assign one switch
(e.g., Switch A) to be the coupler and connect the coupler’s coupling control port with Switch B (for this
example).
The coupler switch (i.e., Switch A) will monitor switch B through the coupling control port to determine whether
or not the coupling port’s backup path should be recovered.