Alcatel-Lucent 5620 Troubleshooting Manual page 273

NTP
O
OAM
OS
OSPF
OSS
P
PC
PDU
PE
PIM
Alcatel-Lucent 5620 Service Aware Manager, Release 6.1 R3
3HE 04244 AAAB Ed. 01
network time protocol
An Internet protocol that network devices use to synchronize their clocks.
operations, administration, and maintenance
A general term used to describe the costs, tasks involved, or other aspects of
operating, administering, and managing a telecommunications network. The
5620 SAM provides a series of OAM tools to monitor and administer the
network.
operating system
open shortest path first
OSPF is an IETF standard link-state routing protocol that is used to
determine the most direct path for a transmission in IP networks.
operations support system
A network management system supporting a specific management function,
such as alarm surveillance and provisioning, in a service provider network.
personal computer
protocol data unit
A PDU is a message of a given protocol comprising payload and
protocol-specific control information, typically contained in a header. PDUs
pass over the protocol interfaces which exist between the layers of protocols,
as indicated in the OSI model.
provider edge
A descriptor for a device or a set of devices at the edge of the provider
network with the functionality that is needed to interface with the customer
and the MPLS network. A PE can be a router or a switch. All the MPLS
tunnels are set up and terminated in the PE. All VPN functionalities reside
in the PE.
protocol independent multicast
Multicast routing architecture that allows the addition of IP multicast routing
on existing IP networks. PIM is unicast routing protocol independent and
can be operated in two modes—dense and sparse.
Troubleshooting Guide
November 2008
Glossary
GL-9