server-to-client. This abbreviation is used in ejabberd documentation.
S2S
server-to-server. This abbreviation is used in ejabberd documentation.
SA
Service Affecting. One of several card states that may be reported by a "show equipment" command in an ADVA
RayExpress optical switch. This condition is more severe than an NSA (Non Service Affecting) condition.
Security Association
System AdministratorX
System Administration
SAA
Service Assurance Agent
SAC
Seminars on Academic Computing
SAFE
Security and Freedom through Encryption
SAFI
Subsequent Address Family Identifier, a multiprotocol BGP concept defined in RFC 4760
SAID
Security Association IDentifier
Salesforce
A Customer Relationship Management company. ADVA pays SalesForce to handle ADVA's online web presence. When you
log in to ADVA's website, you get logged in to a server at SalesForce. ADVA tech support guys are supposed to refer to the ADVA support website
as "Max Portal" to satisfy marketing, but they may refer to it as "Salesforce".
SAM
Systems Account Manager, the software that manages the HPC accounts at UCAR
SAM's
UCAR storage facility/warehouse, located in Marshall
Segmentation and Reassembly. The process by which large packets are broken into pieces for transmission over media (or ATM) that can't
support large packets. The packets are segmented at the source and reassembled at the destination.
SAS
Single Attached Station (an FDDI term)
Software Application Support (Cisco)
SASL
Simple Authentication and Security Layer, a method for adding authentication support to connection-based protocols
Serial Advanced Technology Attachment, a standard for disk cables.
SAU
Software Application support plus Upgrades
SB
Salary and Benefits
SBA
Smart Business Architecture, a Cisco
reference design for enterprise and midsize organizations that provides a path for accelerating the adoption of technology
SBC
Session Border Controller is a device that manages Cisco Telepresence
sessions. NLR runs an SBC so that NLR members can do Telepresence over NLR and I2.
Scientific Computing Division, a UCAR division that was renamed CISL.
SCDUG
SCD Users Group
SCID
SCD Computer Inventory Database. A Macintosh-based database once used to track inventory. Contains inventory information for all machines in
the Mesa and Foothills lab computer rooms and SCD offices.
Science DMZ
A model developed by ESnet (the Department of Energy's network), a Science DMZ is an architecture change to the border of the network on the
campus to allow higher performance network flows, network programmability and performance verification. The term is used by Internet2.
Scrum is an iterative, incremental methodology for project management often
seen in agile software development, a type of software engineering
SCSI
Small Computer System Interface, a bus usually used to connect disk and tape drives to PCs
SD
Standard Definition, as opposed to High Defenition TV
School District
SDAC
SCD Desktop Advisory Committee
SDL
Signal Distribution Layer
SDLC
Synchronous Data Link Control
SDN
Software Defined Networking
Software Defined Networking, in which the control plane and the data
plane in network devices is separated. OpenFlow is an imprementation of SDN. Internet2 uses the term "SDN" to cover the NDDI and OS3E projects to
provide an infrastructure for networking research.
Simple Event Correlator, a Unix program running on netserver that watches syslog messages and sends emails when an "interesting" message is
logged. SEC is started at boot time by /etc/init.sec, and the configuration file is /etc/syslog-ng/logwatch.sec
A computer that shares its resources, such as printers and files, with other computers on the network. For example, a Network File System server shares its disk space with computers that do not have a disk drive their own. To find out who is the
sysadmin of NETS servers, use the ExtraView
Fixed Asset System to show the "NETS - Asset - Server Inventory" report.
SET
Secure Electronic Transactions
SEU
Singe Event Upset
severities
The term NETS uses to refer to the 3 levels of problems that the UCAR NOC might handle. See NETS severity levels
SFF
Small Form Factor, a type of optical connector
sFlow
sflow is is an industry standard technology for monitoring high speed switched networks
SFM
Switching and Forwarding Module (Juniper)
SFP
Small Form Factor Pluggable, or Mini-GBIC, is a type of optical modular transceiver designed for use with small form factor (SFF) connectors,
and offer high speed and physical compactness. They are hot-swappable.
SFPP
Juniper calls its 10G SFP+ optics "SFPP". Dunno why.
System Hardware Availability Reliability Calculation, a Cisco concept
SHARP
Self Healing And Redundant Paths
SHERPA
Dynamic VLAN provisioning system used by NLR. Pete, John and David have SHERPA accounts, and Pete has used SHERPA to provision a VLAN. See
https://sherpa.grnoc.iu.edu/
shibboleth
Shibboleth is standards based, open source software package for web single sign-on across or
within organizational boundaries
shipping
As of 2010-08, the shipping address for NCAR is
UCAR Shipping and Receiving
3090 Center Green Drive
Boulder, CO, 80301-2252
Service Interface Module, a type of circuit pack (card) used in ADVA (Movaz) WDM devices. A SIM provides client, or trib side, interfaces.
You would plug your 850 or 1310nm gig Ethernet into these modules. 3R, Sonet framing (certain modules), and Sonet-like G.709 framing occurs in
these modules.
SIMM
Single Inline Memory Module
Single Number Reach
A UCAR telephone system feature that enables you to manage business calls using a single phone number - your UCAR extension. See the Single Number Reach webpage.
Stateless Address Autoconfiguration, an IPv6 term.
SLAC
Stanford Linear Accelerator
SLC
Salt Lake City, Utah
Subscriber Loop Carrier
SLIB
State Loan and Investment Board, a Wyoming state government body.
SLIP
Serial Line IP. An Internet protocol used to run IP over serial lines such as telephone circuits or RS-232 cables interconnecting two
systems. SLIP is gradually being replaced by PPP, which is more capable.
Self-Monitoring Analysis and Reporting Technology. Most hard drives currently come equipped with SMART systems, which enable the drive to
monitor itself to help determine problems and provide early warnings to failures. You use software to query the SMART system on the drive. On
Linux systems, the SMART software is smartctl. Use "smartctl -l" for options.
Server Message Block, a Microsoft protocol for sharing files, printers, serial ports, and communications abstractions such as named pipes and
mail slots between computers. All Windows systems are capable of being SMB servers or clients. See Richard Sharpe's "Just What Is SMB" page
Switched Multimegabit Data Service. A high-speed networking technology offered by the telephone companies in the U.S.
SMF
Single-Mode Fiber
Software MAC Filter
SMFO
Single-Mode Fiber Optic
SMI
Structure of Management Information. The rules used to define the objects that can be accessed via a network management protocol. See
MIB.
SMM
Spring Member Meeting of the Internet2 members.
SMS
Service Management Solution (CiscoWorks2000 bundle)
SMT
Station Management. Part of the FDDI protocol that manages stations on an FDDI ring. SMT detects when stations enter and/or leave the ring,
causing other stations to wrap the ring.
SMTP
Simple Mail Transfer Protocol. The Internet electronic mail protocol. Defined in RFC 821, with associated message format descriptions in RFC 822.
SNA
Systems Network Architecture. IBM's proprietary network architecture.
David Mitchell calls the backup scheme he installed on fl-netserver "snapshots". See the netserver snapshots page.
SNG
Secure Network Gateway
sniffer
A device used to monitor the traffic on a network, usually to locate problems.
SNK
SecureNet Key
SNMP
Simple Network Management Protocol. The network management protocol of choice for TCP/IP-based internets.
snooping
DHCP snooping prevents malicious or accidental DHCP servers from popping up on subnets and hijacking or breaking connectivity. When DHCP
snoping is enabled on a subnet, only legitimate DHCP servers are allowed to provide DHCP assignments. NETS enables DHCP snooping for divisional
subnets when a division requests it, and UCAR security recommends enabling it. See the NETS DHCP Snooping notes or David Mitchell's presentation on DHCP Snooping.
SNR
Signal to Noise Ratio
Single Number
Reach, a UCAR telephone system feature that enables you to manage business calls using a single phone number - your UCAR extension.
SNTP
Simple Network Time Protocol, defined in RFC 2030, is a simplified
version of NTP. SNTP has less complex argorithms than NTP, and provides less accurate time. Roughly, NTP can provide time accurate to
microseconds, and SNTP can provide time accurate to milliseconds. SNTP is used by devices that have limited compute power, or that just don't
need highly accurate time.
SOS Security, a company taht Level 3 subcontracts building security to.
You may have to deal with SOS to resolve problems with access to Level 3 sites using security badges.
Shelf Processor, a type of circuit pack (card) used in ADVA (Movaz) WDM devices. This is the rough equivalent of a "Supervisor" for the
shelf. Management functions occur on these cards.
Switched Port Analyzer, a feature of Cisco switches that mirrors all traffic seen on a given port to a second port. You then connect a
network analyer to the second port, in order to monitor the traffic on the first port. Use "monitor" commands on the switch to set up port
spanning. As of 2011-09-09, UCAR uses spanning to mirror commodity traffic to a security server, and the FRGP uses spanning to mirror TSIC
and Comcast traffic to a LANDER server at 1200 Larimer.
Space Physics Analysis Network, a DECnet network maintained by NASA
SPANS
Simple Protocol for ATM Network Signalling. A protocol developed by Fore Systems as a pre-standard mechanism for establishing SVCs.
SPARC
Space Physics and Aeronomy Research Collaboratory
SPD
Selective Packet Discard, a feature of Cisco routers.
SPE
Service Processing Element
SPF
Shortest Path First
SPI
Security Parameter Index
SPICE
Solid Precipitation Intercomparison Experiment, a project of the WMO
SPIN
Software Process Improvement Network (ColoSPIN-Colorado SPIN)
Service Provider Identification Number, a term used by E-Rate
splunk
A program that can be used to "watch" system log files and take action when a pattern is recognized. We use SEC to do the same thing. See
http://www.splunk.com/
SPO
Standing Purchase Order. UCB has an SPO with Cisco, which makes it easy to buy things.
Spinning Pinwheel of Death, an animated cursor that Mac OS X displays to
indicate that an application is unresponsive. Hopefully, it stops at some point :-)
Service Provider Port, a term used by CenturyLink to refer to the ports on CenturyLink equipment that a customer can connect to.
Springs International
A language school on the Auraria campus, and a member of the UPop.
SPSL
Security Policy Specification Language
SPT
Shortest Path Tree, a multicast term.
SQE
Signal Quality Error, sometimes referred to as heartbeat. A signal from an Ethernet transceiver to the attached device indicating that a
collision has occurred. Most transceivers have a switch allowing SQE generation to be enabled or disabled. 802.3 repeaters require SQE to be
disabled. Sun workstations shouldn't care but seem to like it off.
SQL
Structured Query Language, the standard language for defining and accessing relational
databases. NETS uses postgreSQL it the NND application, and UCAR uses the ORACLE SQL relational database.
SQuAD
Software Quality Association in Denver
SR
Short Range (a.k.a. short reach) optics use 1310nm and can drive a
10G signal up to 82 meters.
SR10
An IEEE optical interface type that supports 100G on multi-mode fiber over distances of 100 meters.
SRLG
Shared Risx Link Group, an MPLS term
SRND
Solution Reference Network Design, a Cisco term for a class of documents. There is a SRND on Enterprise QoS and another SRND on Unified
Communications
Secure Sockets Layer, a protocol for transmitting secure documents over a network
SSO
Stateful Switchover, a Cisco term for the way Supervisor cards in Catalyst switches can be configured so that a backup supervisor maintains a
copy of the state of the active supervisor card. When running SSO, the backup card can quickly assume operation when the active card fails,
because the backup already knows the state information of the active card. As of 2009-11-09, we run SSO in the 2 main FRGP switches.
SSSF
Surface and Sounding Systems Facility
ST
Straight Tip, a type of fiber connector. Differs from SC (square connector) connectors.
A name the FRGP engineers coined in late 2007 for an evolution of the DREAM network. The idea of SuperDREAM was to use VRFs to make
1850 Pearl and 1200 Larimer more redundant, and to let FRGP members connect at either site
for the same services. At one point, we labelled lambdas on the BiSON ring "SD-A" and "SD-B", to mean "SuporDREAM-A" and "SuperDREAM-B". Those
names don't have much meaning, so we now refer to those BiSON lambdas "Commodity-A" and "Commodity-B".
Software mismatch, a.k.a. Incorrect software load. One of several alarm types that may be displayed by a "show alarm" command in an ADVA
(Movaz) RayExpress device. "SW-MISM" can arise if the versions of software in the active and standby SP cards are not the same.
SWAP
Shared Wireless Access Protocol
swatch
A program that "watches" syslog files and takes actions (like sending email) when messages are logged that match certian predifined patterns.
See How NETS uses swatch.
sympa is mailing list software. Internet2 uses sympa to handle I2's mailing lists.
Synoptics
A company that used to make hubs. Synoptics merged into Bay Networks.
Syslog
A scheme for logging messages from several machines onto one Unix machine. A daemon on the Unix machine accepts messages and writes them to a
log file. NETS uses syslog to record messages sent by networking devices. See How NETS uses syslog.
