Cisco ONS 15327 User Documentation page 536

Glossary
SNMP
Simple Network Management Protocol. Network management protocol used almost exclusively in TCP/IP networks. SNMP
monitors and controls network devices and manages configurations, statistics collection, performance, and security.
SNTP
Simple Network Time Protocol. Using an SNTP server ensures that all ONS network nodes use the same date and time
reference. The server synchronizes alarm timing during power outages or software upgrades.
Soft reset
A soft reset reloads the operating system, application software, etc., and reboots the card. It does not initialize the ONS 15327
ASIC hardware.
SONET
Synchronous Optical Network. High-speed synchronous network specification developed by Telcordia Technologies, Inc. and
designed to run on optical fiber. STS-1 is the basic building block of SONET. Approved as an international standard in 1988.
Spanning tree
Loop-free subset of a network topology. See also STA and STP.
SPE
Synchronous Payload Envelope. A SONET term describing the envelope that carries the user data or payload.
SSM
Synchronous Status Messaging. A SONET protocol that communicates information about the quality of the timing source using
the S1 byte of the line overhead.
STA
Spanning-Tree Algorithm. An algorithm used by the spanning tree protocol to create a spanning tree. See also Spanning tree
and STP.
Standing alarms
Alarms that are currently active.
Static route
A route that is manually entered into a routing table. Static routes take precedence over routes chosen by all dynamic routing
protocols.
STP
Spanning Tree Protocol. Bridge protocol that creates a spanning tree to enable a learning bridge to work dynamically around
loops in a network topology. See also Spanning tree, STA, and Learning bridge.
STS-1
Synchronous Transport Signal 1. Basic building block signal of SONET, operating at 51.84 Mbps for transmission over OC-1
fiber. Faster SONET rates are defined as STS-n, where n is a multiple of 51.84 Mbps. See also SONET.
Cisco ONS 15327 User Documentation, R3.3
GL-12
June 2002