Interlogix NS3552-8P-2S-V2, User Manual

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Glossary
500 NS3552-8P-2S-V2 User Manual
M
MAC Table
Switching of frames is based upon the DMAC address
contained in the frame. The switch builds up a table that maps
MAC addresses to switch ports for knowing which ports the
frames should go to based upon the DMAC address in the
frame. This table contains both static and dynamic entries. The
static entries are configured by the network administrator if the
administrator wants to do a fixed mapping between the DMAC
address and switch ports.
The frames also contain a MAC address (SMAC address ),
that shows the MAC address of the equipment sending the
frame. The SMAC address is used by the switch to
automatically update the MAC table with these dynamic MAC
addresses. Dynamic entries are removed from the MAC table if
no frame with the corresponding SMAC address have been
seen after a configurable age time.
MEP MEP is an acronym for Maintenance Entity Endpoint and is an
endpoint in a Maintenance Entity Group (ITU-T Y.1731).
MD5 Message-Digest algorithm 5. MD5 is a message digest
algorithm using a cryptographic hash function with a 128-bit
hash value. It was designed by Ron Rivest in 1991. MD5 is
officially defined in RFC 1321 – The MD5 Message-Digest
Algorithm.
Mirroring For debugging network problems or monitoring network traffic,
the switch system can be configured to mirror frames from
multiple ports to a mirror port. In this context, mirroring a frame
is the same as copying the frame.
Both incoming (source) and outgoing (destination) frames can
be mirrored to the mirror port
MLD Multicast Listener Discovery for IPv6. MLD is used by IPv6
routers to discover multicast listeners on a directly attached
link, much as IGMP is used in IPv4. The protocol is embedded
in ICMPv6 instead of using a separate protocol.
MVR Multicast VLAN Registration. It is a protocol for Layer 2 (IP)
networks that enables multicast traffic from a source VLAN to
be shared with subscriber VLANs.
The main reason for using MVR is to save bandwidth by
preventing duplicate multicast streams being sent in the core
network, instead the stream(s) are received on the MVR-VLAN
and forwarded to the VLANs where hosts have requested
it/them.
N
NAS
Network Access Server. The NAS is meant to act as a gateway
to guard access to a protected source. A client connects to the
NAS, and the NAS connects to another resource asking
whether the client's supplied credentials are valid. Based on
the answer, the NAS then allows or disallows access to the
protected resource. An example of a NAS implementation is
IEEE 802.1X.