ExtremeWare XOS 11.3 Concepts Guide
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master node In EAPS, the master node is a switch, or node, that is designated the
master in an EAPS domain ring. The master node blocks the
secondary port for all non-control traffic belonging to this EAPS
domain, thereby avoiding a loop in the ring.
master router In VRRP, the master router is the physical device (router) in the VRRP
virtual router that is responsible for forwarding packets sent to the
VRRP virtual router and for responding to ARP requests. The master
router sends out periodic advertisements that let backup routers on
the network know that it is alive. If the VRRP IP address owner is
identified, it always becomes the master router.
master VLAN In ESRP, the master VLAN is the VLAN on the ESRP domain that
exchanges ESRP-PDUs and data between a pair of ESRP-enabled
devices. You must configure one master VLAN for each ESRP domain,
and a master VLAN can belong to only one ESRP domain.
MED Multiple exit discriminator. BGP uses the MED metric to select a
particular border router in another AS when multiple border routers
exist.
metering In QoS, metering monitors the traffic pattern of each flow against the
traffic profile. For out-of-profile traffic the metering function interacts
with other components to either re-mark or drop the traffic for that
flow. In the Extreme Networks implementation, you use ACLs to
enforce metering.
member VLAN In ESRP, you configure zero or more member VLANs for each ESRP
domain. A member VLAN can belong to only one ESRP domain. The
state of the ESRP device determines whether the member VLAN is in
forwarding or blocking state.
MIB Management Information Base. MIBs 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.
mirroring Port mirroring configures the switch to copy all traffic associated with
one or more ports to a designated monitor port. The monitor port can
be connected to an network analyzer or RMON probe for packet
analyzer.
MMF Multimode fiber. MMF is a fiber optic cable with a diameter larger
than the optical wavelength, in which more than one bound mode can
propagate. Capable of sending multiple transmissions simultaneously,
MMF is commonly used for communications of 2 kilometers or less.
M (Continued)
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