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GL-6
Cisco ASR 1000 Series Aggregation Services Routers MIB Specifications Guide
OL-15161-06
O
OID
Object identifier. Values are defined in specific MIB modules. The Event MIB allows you or an NMS
to watch over specified objects and to set event triggers based on existence, threshold, and Boolean
tests. An event occurs when a trigger is fired; this means that a specified test on an object returns a value
of true. To create a trigger, you or an NMS configures a trigger entry in the mteTriggerTable of the
Event MIB. This trigger entry specifies the OID of the object to be watched. For each trigger entry type,
corresponding tables (existence, threshold, and Boolean tables) are populated with the information
required for carrying out the test. The MIB can be configured so that when triggers are activated (fired)
either an SNMP Set is performed, a notification is sent out to the interested host, or both.
OIR
Online Insertion and Removal.
OSM
Optical Services Module
P
PA
Port Adapter
PAP
Password Authentication Protocol. Authentication protocol that allows PPP peers to authenticate one
another. The remote router attempting to connect to the local router is required to send an authentication
request. Unlike CHAP, PAP passes the password and host name or username in the clear (unencrypted).
PAP does not itself prevent unauthorized access, but identifies the remote end. The router or access
server determines if that user is allowed access. PAP is supported only on PPP lines.
PEM
Power Entry Module.
Polling
Access method in which a primary network device inquires, in an orderly fashion, whether secondaries
have data to transmit. The inquiry occurs in the form of a message to each secondary that gives the
secondary the right to transmit.
POS
Packet Over SONET
PPP
Point-to-Point Protocol. Provides router-to-router and host-to-network connections over synchronous
and asynchronous circuits. PPP is designed to work with several network layer protocols, such as IP,
IPX, and ARA. PPP also has built-in security mechanisms, such as CHAP and PAP. PPP relies on two
protocols: LCP and NCP.
Q
QoS
Quality of service. Measure of performance for a transmission system that reflects its transmission
quality and service availability.
R
RADIUS
Remote Authentication Dial-In User Service. RADIUS is a distributed client/server system that secures
networks against unauthorized access. In the Cisco implementation, RADIUS clients run on Cisco
routers and send authentication requests to a central RADIUS server that contains all user
authentication and network service access information.