MAC Authentication
Bypass, allows you to authenticate devices by MAC address in 802.1x-enabled environments. MAB replaced Cisco VMPS.
MAC
Media Access Control
Moves, Adds, Changes
MAC address
A Media Access Control address is a 48-bit number, often called the "physical address", "Ethernet address", or "hardware address", used at
the lowest network layer. There are three standard formats used to express MAC-level addresses. For example, 2:60:8c:0:76:67, 02-60-8c-00-76-67,
and 0260.8C00.7667 represent the same MAC-level address.
MacTracker
MacTracker (guest/comet) is a program that tracks Port Lists (SwitchMap) data so that you can
look historical information about MACs, ports, etc. It was written by Robert Bubon of COMET.
MaDDash
Monitoring and Debugging Dashboard, a component of the perfSONAR software toolkit. David Mitchell got it working for the XSEDE perfsonar
machine, at http://ps.ncar.xsede.org/maddash-webui/
Part of an electronic mail delivery system which allows a message to be delivered to a list of addressees. Mail exploders are used to
implement mailing lists. Users send messages to a single address (e.g., hacks@somehost.edu) and the mail exploder takes care of delivery to the
individual mailboxes in the list.
mail gateway
A machine that connects two or more electronic mail systems (especially dissimilar mail systems on two different networks) and transfers
messages between them. Sometimes the mapping and translation can be quite complex, and generally it requires a store-and-forward scheme whereby
the message is received from one system completely before it is transmitted to the next system after suitable translations.
ADVA's name for their customer website. ADVA pays SalesForce to handle ADVA's online web presence. When you log in to ADVA's website, you get logged in to a
server at SalesForce. ADVA tech support guys are supposed to refer to the ADVA support website as "Max Portal" to
satisfy marketing, but they may refer to it as "Salesforce".
management Ethernet interface on a Juniper switch. If the switch is part of a Virtual Chassis, the me0 interface is disabled and the chassis
is accessed via the vme interface.
MEA-APPROVE
Unapproved plug type. This is an alarm that can be reported by ADVA equipment. It means that the the physically inserted plug is not an
approved plug. This can happen because we've inserted an SFP in an R7 shelf that isn't an ADVA-brand SFP, though it may work fine.
MEA-DIFFER
Mismatch of plug equipment versus provisioned attributes due to a difference in specifications. This is an alarm that can be reported by ADVA
equipment. It means that the physically inserted plug exceeds the provisioned RATE or REACH settings. Note that in this case, the plug may be
able to provide signal transport, but the specifications of the signal may not conform to the provisioned settings (e.g. the optical power level
may be too high).
MEC
Multichassis EtherChannel, a Cisco Layer 2 multipathing technology
MED
Multi-Exit Discriminator, an optional nontransitive BGP attribute that can be attached to an advertised prefix.
medium
The material used to support the transmission of data. Examples include copper wire, coaxial cable, optical fiber, or electromagnetic wave
(microwave).
Master Email File, the list of UCAR email addresses, generated by the Database Services
Team
Merit
Merit Network, Inc. maintains a routing registry called the RADb(Routing Assets Database). NETS pays Merit a yearly fee for update access to the
RADb.
MERT
Medical Emergency Response Team
MetaCenter
The term MetaCenter refers to the collaboration of national supercomputing centers: CTC, NCSA,
PSC, SDSC, NCAR.
MFOG
Marshall Field Oversight Group
MFP
Multi-Function Panel, a term for the fiber patch panels used by Level 3 in the colocation facility at 1850 Pearl Street.
MFS
Marshall Field Site, a UCAR site.
2062 S. 66th Street
Boulder, CO 80303
Also known as MAR.
MGCP
Media Gateway Control Protocol
mgd
The management daemon on a Juniper device. mgd manages the configuration of the router and all user commands. The management process is
responsible for notifying other processes when a new configuration is committed. It also spawns a CLI process when a user logs in.
MIB
Management Information Base. A collection of objects that can be accessed via a network management protocol like SNMP. NETS stores MIB files
in the /usr/share/snmp/mibs/ directory on netserver, which is where the Net-SNMP command suite (snmpwalk, etc.) looks for MIB files.
Media Interface Connector. The most common connector on the ends of FDDI cables.
MICA
Modem ISDN Channel Aggregation
MIF
Management Information Format
MIGS
Mainframe/Internet Gateway Server
MILNET
MILitary NETwork. Originally part of the ARPANET, MILNET was partitioned in 1984 to make it possible for military installations to have
reliable and secure network service, while the ARPANET continued to be used for research.
MIME
Multipurpose Internet Mail Extensions
MiniMMAC
A small version of an MMAC. It has up to 13 ports, which may be AUI, thin, twisted pair, or fiber.
MINT
Millennium Infrastructure Network Technology
MJ
Major. An ADVA Notification Code (NC) that indicates that a service affecting condition has developed and an urgent corrective action is
required.
ML
Mesa Laboratory of NCAR, at 1850 Table Mesa Drive, Boulder, CO.
Managed Modem Service, a product sold by Level 3. In 2007, NETS
stopped using a physical RAS device to provide dial-up service to UCAR staff. We bought MMS instead.
MMTL
Modem Management Technology Licenses (Cisco)
MN
Minor. An ADVA Notification Code (NC) that indicates the existence of a non-service affecting condition and that corrective action should be
taken in order to prevent a more serious (for example, service affecting) fault.
Metro Optical Ethernet, a product sold by CenturyLink. When CenturyLink absorbed Qwest, CenturyLink changed the name of the product from QMOE
to MOE. See the CenturyLink MOE Spreadsheet
Message Passing Interface, a standardized API used for parallel and/or distributed computing.
MPLA
Multi-Lateral Peering Agreement, often used to define rules governing peers in an Internet exchange point like the RMIX (Rocky Mountain
Internet Exchange)
Multiple-Fiber Push-On/Pull-off, a type of connector used with multi-fiber ribbon cable
MPPE
Microsoft Point-to-Point Encryption
MPPS
Million Packets Per Second
MQC
Modular Quality of Service
Command Line Interface, a sublanguage of Cisco IOS that standardizes the semantics for defining QoS features. MQC allows QoS to be configured
consistently across Cisco devices.
MR2000c
A repeater manufactured by Cabletron systems. It has one AUI port and one thinwire port.
MR5000
A repeater manufactured by Cabletron systems. It has one AUI port and four thinwire ports.
MR9000
A multi-port repeater manufactured by Cabletron systems. It has one AUI port and 8 thinwire ports.
Multiple Registration Protocol, allows bridges, switches or
other similar devices to be able to register and de-register attribute values, such as VLAN identifiers and multicast group membership across
a large LAN.
a Brocade proprietary protocol that prevents Layer 2 loops and provides fast reconvergence in Layer 2 ring topologies. It is an
alternative to STP and is especially useful in Metropolitan Area Networks.
MRXI
A 10base-T (unshielded twisted pair) hub manufactured by Cabletron Systems. It has 12 ports, with provisions for 2 additional ports that may
be other than 10base-T.
MS
MicroSoft
milliseconds
MSA
Multi-Source Agreement, an agreement between manufacurers that specifies the properties of the item to allow interaction. MSAs define the
specs for optical transceivers, SFPs, GBICs, CFPs, etc.
Master Services Agreement
MSC
Mesa State College, renamed "Colorado Mesa University" in August 2011, was a secondary FRGP member
behind UCDHSC until May 2007, when they elected not to join the new UPoP
Media Services Engine, a component of Cisco Telepresence systems
MSFC
Multilayer Switch Feature Card (Cisco) a daughter card for Cisco Supervisor modules in Catalyst switches. The MSFC is a routing engine. In
Sup 720s, the MSFC and PFC daughtercards are not optional.
MSM
Microwave Switching Matrix
Multilayer Switch Module (Cisco)
MSN
MSN Communications, a company that UIS contracts with for networking design consulting
A multi-port transceiver manufactured by Cabletron Systems. It has 9 ports, 8 or which are configured to look like a transceiver port. The
9th port connects to a transceiver. This device is basically the same as a DELNI.
MTBF
Mean Time Between Failures
MTP
Media Termination Point
MTTR
Mean Time To Repair
MTU
Maximum Transmission Unit. The largest possible unit of data that can be sent on a given physical medium. Example: The MTU of Ethernet is
1500 bytes. See fragmentation.
Multiport Tranceiver Unit, like a Cabletron MT-800
A computer connected to more than one physical data link. The data links may or may not be attached to the same network.
multicast
A special form of broadcast where copies of the packet are delivered to only a subset of all possible destinations. See MBONE.
multiplex
The division of a single transmission medium into multiple logical channels supporting many simultaneous sessions. A way to support multiple
connections on one line, often by giving the channel to each session for a short portion of time, then giving another session the channel, then
another, etc.
