Switch User's Manual

Navigation 15
attenuation
The decrease in signal strength in an optical fiber
caused by absorption and scattering.
attribute
A unit of data that is used by BGP to describe
any of the following prefixes: AS-PATH,
LOCAL-PREF, NEXT-HOP, and so on.
automatic protection switching (APS)
A Synchronous Optical Network (SONET)
feature that protects against line failure.
AS (autonomous system)
A set of routers under a single technical
administration, using a single IGP and common
metrics to route packets within the AS, and using
an EGP to route packets to other ASs.
AS confederation
A single logical AS that comprises multiple
sub-ASs to ensure scalability.
autonomous system border router (ASBR)
A router attached at the edge of an OSPF
network. An ASBR uses one or more interfaces
that run an interdomain routing protocol such
as BGP. In addition, a router distributing static
routes or Routing Information Protocol (RIP)
routes into OSPF is considered an ASBR.
ASN (autonomous system number)
A two-byte number that is used to identify a
specific AS.
Nortel Ethernet Routing Switch 8600
Terminology
NN46205-102 01.01 Standard
30 May 2008
Copyright © 2008 Nortel Networks
.