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MAGNUM 6K SWITCHES, MNS-6K USER GUIDE
Chapter
14
14 – S-Ring™ and Link-Loss-Learn™
(LLL)
Speed up recovery from faults in Ethernet networks
S
-Ring uses ring topology to provide fast recovery from faults. These are based on
industry standard STP technologies. These technologies have been adapted to ring
recovery applications by GarrettCom Inc. and these rings are called S-Ring. In
addition, LLL enables a switch to rapidly re-learn MAC addresses in order to
participate in S-Ring configurations. One advantage of S-Ring is that the fast
recovery works with managed as well as some non managed switches as well.
In the last two chapters we looked at how RSTP or STP can be used to bring
resiliency to a meshed network. This chapter’s focus is to look at ring topologies and
how these topologies can be used to provide faster recovery times than what STP or
RSTP can offer. Both RSTP and STP are industry standard protocols and can be
used with networking switches from different vendors.
LLL triggers action on the device supporting LLL when a connection is broken or
there is loss of the link signal on a ring port. LLL can be used with S-Ring on
managed switches such as the GarrettCom Magnum 6K family of switches. LLL can
also be used on managed switches such as Magnum 6K family of switches, Magnum
mP62 as well as on unmanaged switches such as ESD42 switches. Note that LLL
can also be used with non-ring topologies (such as mesh topologies) using RSTP or
STP where it does the necessary actions for fault recovery (such as re-learn
addresses) in case of a link failure.
S-Ring is a ring technology using the GarrettCom MNS-6K software. In a S-Ring, a
switch is designated as a “Ring Manager”. Devices in a S-Ring can be managed
switches such as the Magnum 6K family of switches, other managed switches such as
Magnum mP62 or unmanaged switches such as ESD42 or even hubs which
leverages LLL. S-Ring is a licensed product from GarrettCom Inc. GarrettCom Inc.
also licenses this technology to other companies who are interested in implementing
the resiliency capabilities offered by S-Ring.
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