Switch User's Manual

72 S
shim
MPLS uses a shim header for Ethernet packets
so they can accommodate a label in their
header. MPLS uses the shim to make forwarding
decisions. The shim label is a 32-bit identifier
used to identify a FEC.
shortest path first (SPF)
A class of routing protocols that use Djikstra’s
algorithm to compute the shortest path through
a network, according to specified metrics, for
efficient transmission of packet data.
shortest path tree (SPT)
Creates a direct route between the receiver and
the source for group members in a Protocol
Independent Multicast - Spare Mode (PIM-SM)
domain.
signal computing system architecture
An open-system protocol that describes devices
and specifies interfaces for a signal processing
system for PC-based communications
processing.
Simple Network Management Protocol (SNMP)
Administratively monitors network performance
through agents and management stations.
Simple Loop Prevention Protocol (SLPP)
Is used to prevent loops in a SMLT network.
Single Link SMLT (SLT)
single mode fiber (SMF)
One of the various light waves transmitted in
an optical fiber. Each optical signal generates
many modes, but in single-mode fiber only
one mode is transmitted. Transmission occurs
through a small diameter core (approximately 10
micrometers), with a cladding that is 10 times
the core diameter. These fibers have a potential
bandwidth of 50 to 100 GHz per kilometer.
single spanning tree bridge
A bridge that can support only a single spanning
tree, the common spanning tree (CST).
Nortel Ethernet Routing Switch 8600
Terminology
NN46205-102 01.01 Standard
30 May 2008
Copyright © 2008 Nortel Networks
.