Contemporary Control Systems Compact Managed Switches Software Manual for Console Access - Manual (Page 43)

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4.3.9.3.1.1 RapidRing and Other Management Features
As a rule, when ring ports are enabled for RapidRing use, they should not be involved
with other management features. Specific issues are described below.
Port Parameters — If RapidRing is enabled, the “Configure Ports” options (Figure 6)
are not available for the ring ports. That is, ring ports cannot be disabled nor can their
configuration be changed.
Trunking — RapidRing and trunking cannot use the same ports. If a ring port exists as
part of a trunk, the ring cannot be enabled. Either remove the ring port(s) from the trunk
or disable the trunk that includes the ring port(s). Otherwise, the ring cannot be
established. If a ring is enabled, its ports cannot be added to a trunk.
Mirroring — RapidRing ports may be mirrored like any other port, but neither of the ring
ports should be designated as a Mirror Port (see Section 4.2.1.4).
VLANs — Ring ports must be included in the same VLAN or in none at all.
Multicast Filtering and Static Forwarding — RapidRing ports may be used for these
functions, but the even-numbered ring port of the ring master is normally unavailable.
QoS — RapidRing ports do support QoS.
4.3.9.3.2 Multiple RapidRings
RapidRing will also support up to 100 interconnected rings (each having its own ID
number) — allowing greater flexibility of wiring and network styles. Figure 34 shows two
rings connected via two redundant network links — thus protecting against failure of a
single cable within the trunk. (However, the two rings could be connected by just one
link, if inter-ring redundancy were unneeded.) The two switches providing the inter-ring
connection may be either master or slave but must use only non-ring ports for the trunk.
Figure 34 — Dual RapidRings
To setup the RapidRing via the console port settings, select System Configuration,
then Configure RapidRing (described in Section 4.2.1.9.3.4). Also, if the two rings are
to have redundant lines between them, configure a trunk between the two switches that
connect the rings together. (See Section 4.2.1.3 for configuring a trunk).