Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 2207)

Appendix B: Glossary
Software Reference for x310 Series Switches
C613-50046-01 REV A AlliedWare Plus TM Operating System - Version 5.4.4C B.17
Master node
In EPSR , the controlling node for a domain, responsible for polling the ring state,
collecting error messages, and controlling the flow of traffic in the domain.
Master node states are:
■ Complete - the state when there are no link or node failures on the ring.
■ Failed - the state when there is a link or node failure on the ring. This state indicates
that the master node received a Link-Down message or that the failover timer expired
before the master node’s secondary port received a Health message.
For more information see “Ring Components and Operation” on page 57.2 .
MD5
Message Digest 5 authentication algorithm.
Metering
See Policing .
Metric
The sum of all the costs along the path to a given destination. See Cost .
MLD
Multicast Listener Discovery. MLD is used to exchange membership status information
between IPv6 routers that support multicasting and members of multicast groups on a
network segment. Host membership in a multicast group is reported by individual
member hosts, and membership status is periodically polled by multicast routers.
MLD snooping
MLD snooping is a feature whereby a Layer 2 switch listens to or “snoops” the MLD
messages passing through the switch or from member hosts and multicast routers. The
purpose of MLD snooping is to provide efficient Layer 2 multicast forwarding, by sending
only to hosts that have expressed an interest in receiving the multicast data.
For more information see Chapter 32, MLD and MLD Snooping Introduction and
Commands .
MSTI
Multiple Spanning Tree Instance. MSTP enables the grouping and mapping of VLANs to
different spanning tree instances. An MST Instance (MSTI) is a particular set of VLANs that
are all using the same spanning tree.
For more information see “Multiple Spanning Tree Instances (MSTI)” on page 18.12 .
MSTP
Multiple Spanning Tree Protocol. MSTP is similar to Rapid Spanning Tree Protocol ( RSTP ) -
it provides loop resolution and rapid convergence. However it also has the extra
advantage of making it possible to have different forwarding paths for different multiple
spanning tree instances. This enables load balancing of network traffic across redundant
links. A device running MSTP is compatible with other devices running RSTP or
STP .
For more information see “Multiple Spanning Tree Protocol (MSTP)” on page 18.11 .
For a configuration example see “Configuring MSTP” on page 18.19 .