Westermo MDI-112-F4G - Manual (Page 74)

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all of the switches have the same priority, the switch with the highest MAC
address will be selected as Ring Master.
Ring Port1: In Rapid Super Ring environment, you should have two Ring Ports. No
matter if the switch is Ring Master or not, when configuring RSR, two ports
should be selected as Ring Ports. For Ring Master, one of the ring ports will
become the forwarding port and the other one will become the blocking port.
Path Cost: Change the Path Cost of Ring Port1. If this switch is the Ring Master of
a Ring, then it determines the blocking port. The Port with higher Path Cost in the
two ring Port will become the blocking port, If the Path Cost is the same, the port
with larger port number will become the blocking port.
Ring Port2: Assign another port for ring connection
Path Cost: Change the Path Cost of Ring Port2
Rapid Dual Homing: Rapid Dual Homing is a feature of MSR. When you want to
connect multiple RSR or form a redundant topology with other vendors, RDH
could allow you to have maximum seven multiple links for redundancy without
any problem.
In Rapid Dual Homing, you don’t need to configure specific port to connect to
other protocol. The Rapid Dual Homing will smartly choose the fastest link for
primary link and block all the other links to avoid loop. If the primary link failed,
Rapid Dual Homing will automatically forward the secondary link for network
redundancy. If there are more connections, they will be standby links and recover
one of them if both primary and secondary links are down.
Ring status: To enable/disable the Ring. Please remember to enable the ring after
you add it.
4.4.8 Multiple Super Ring Information
This page shows the RSR information.