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Glossary
GL-5
Cisco ASR 1000 Series Aggregation Services Routers MIB Specifications Guide
OL-15161-06
M
Major alarm severity
type
Used for hardware or software conditions. Indicates a serious disruption of service or the
malfunctioning or failure of important hardware. Requires immediate attention and response of a
technician to restore or maintain system stability. The urgency is less than in critical situations because
of a lesser effect on service or system performance. For example, a minor alarm is generated if a
secondary NSE-100 or NPE-G100 card fails or it is removed.
Minor alarm
severity type
Used for troubles that do not have a serious effect on service to customers or for alarms in hardware
that are not essential to the operation of the system.
MIB
Management Information Base. Database of network management information that is used and
maintained by a network management protocol such as SNMP. The value of a MIB object can be
changed or retrieved by means of SNMP commands, usually through a network management system.
MIB objects are organized in a tree structure that includes public (standard) and private (proprietary)
branches.
MIB II
MIB-II is the follow on to MIB-I which was the original standard SNMP MIB. MIB-II provided some
much needed enhancements to MIB-I. MIB-II is very old, and most of it has been updated (that which
has not is mostly obsolete). It includes objects that describe system related data, especially data related
to a system’s interfaces.
MPLS
Multiprotocol Label Switching. MPLS is a method for forwarding packets (frames) through a network.
It enables routers at the edge of a network to apply labels to packets (frames). ATM switches or existing
routers in the network core can switch packets according to the labels with minimal lookup overhead.
MPLS interface
An interface on which MPLS traffic is enabled. MPLS is the standardized version of Cisco original tag
switching proposal. It uses a label forwarding paradigm (forward packets based on labels).
MTU
Maximum transmission unit. Maximum packet size, in bytes, that a particular interface can handle.
N
NAS
Network access server. Cisco platform or collection of platforms such as an AccessPath system which
interfaces between the Internet and the circuit world (the PSTN).
NMS
Network management system. System responsible for managing at least part of a network. An NMS is
generally a reasonably powerful and well-equipped computer, such as an engineering workstation.
NMSs communicate with agents to help keep track of network statistics and resources.
NHLFE
Next Hop Label Forwarding Entry.