A Link State Advertisement is a broadcast packet used by link state protocols, such as
. The LSA contains information about neighbors and path costs and is used by the
receiving router to maintain a routing table.
MAC
Media Access Control layer. One of two sublayers that make up the Data Link Layer of the OSI model.
The MAC layer is responsible for moving data packets to and from one NIC to another across a shared
channel.
MD5
Message-Digest algorithm is a hash function that is commonly used to generate 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.
MEP
CFM (Connectivity Fault Management)
, a Maintenance End Point is an end point for a single domain,
or maintenance association. The MEP may be either an UP MEP or a DOWN MEP.
MIB
Management Information Bases make up a database of information (for example, traffic statistics and
port settings) that the switch makes available to network management systems. MIB names identify
objects that can be managed in a network and contain information about the objects. MIBs provide a
means to configure a network device and obtain network statistics gathered by the device. Standard,
minimal MIBs have been defined, and vendors often have private enterprise MIBs.
MIC
Message Integrity Check (or Code), also called ‘Michael’, is part of
. The MIC is an additional 8-byte code inserted before the standard 4-byte
appended in by standard
WEP (Wired Equivalent Privacy)
to the 802.11
message. This greatly increases the difficulty in carrying out forgery attacks.
Both integrity check mechanisms are calculated by the receiver and compared against the values sent
by the sender in the frame. If the values match, there is assurance that the message has not been
tampered with.
MLD
Multicast Listener Discovery is used by IPv6 routers to discover multicast listeners on a directly attached
link, much as
IGMP (Internet Group Management Protocol)
is used in IPv4. The protocol is embedded in
ICMPv6 instead of using a separate protocol.
MPLS
Multiprotocol Label Switching speeds up network traffic. When forwarding packets, the Layer 2
(Switching) label is used to avoid complex destination lookups in the routing table. MPLS uses Label
Switched Paths (LSPs) to establish the network path. The packet will be labeled so that service
providers can decide the best way to keep traffic flowing. The Multiprotocol Label Switching Transport
Profile (MPLS-TP) extensions to MPLS are designed to meet service provider requirements and are used
as a network layer technology in transport networks. MPLS-TP gives service providers a reliable packet-
based technology that is based on circuit-based transport networking. MPLS-TP is expected to be a low
cost level 2 technology (if the limited profile is implemented in isolation) that will provide
, end-to-end
OAM (Operation Administration & Maintenance)
and protection switching.
Glossary
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