server-to-client. This abbreviation is used in ejabberd documentation.
server-to-server. This abbreviation is used in ejabberd documentation.
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.
Service Assurance Agent
Seminars on Academic Computing
Security and Freedom through Encryption
Subsequent Address Family Identifier, a multiprotocol BGP concept defined in RFC 4760
Security Association IDentifier
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".
Systems Account Manager, the software that manages the HPC accounts at UCAR
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.
Single Attached Station (an FDDI term)
Software Application Support (Cisco)
Simple Authentication and Security Layer, a method for adding authentication support to connection-based protocols
Scientific Computing Division, a UCAR division that was renamed CISL.
SCD Users Group
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.
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
Small Computer System Interface, a bus usually used to connect disk and tape drives to PCs
Standard Definition, as opposed to High Defenition TV
SCD Desktop Advisory Committee
Signal Distribution Layer
Synchronous Data Link Control
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.
Secure Electronic Transactions
Singe Event Upset
The term NETS uses to refer to the 3 levels of problems that the UCAR NOC might handle. See NETS severity levels
Small Form Factor, a type of optical connector
sflow is is an industry standard technology for monitoring high speed switched networks
Switching and Forwarding Module (Juniper)
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.
Juniper calls its 10G SFP+ optics "SFPP". Dunno why.
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
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.
Stanford Linear Accelerator
Salt Lake City, Utah
Subscriber Loop Carrier
State Loan and Investment Board, a Wyoming state government body.
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
A device used to monitor the traffic on a network, usually to locate problems.
Simple Network Management Protocol. The network management protocol of choice for TCP/IP-based internets.
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.
Signal to Noise Ratio
Reach, a UCAR telephone system feature that enables you to manage business calls using a single phone number - your UCAR extension.
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.
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
Simple Protocol for ATM Network Signalling. A protocol developed by Fore Systems as a pre-standard mechanism for establishing SVCs.
Space Physics and Aeronomy Research Collaboratory
Selective Packet Discard, a feature of Cisco routers.
Service Processing Element
Shortest Path First
Security Parameter Index
Solid Precipitation Intercomparison Experiment, a project of the WMO
Software Process Improvement Network (ColoSPIN-Colorado SPIN)
Service Provider Identification Number, a term used by E-Rate
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
Standing Purchase Order. UCB has an SPO with Cisco, which makes it easy to buy things.
Service Provider Port, a term used by CenturyLink to refer to the ports on CenturyLink equipment that a customer can connect to.
A language school on the Auraria campus, and a member of the UPop.
Security Policy Specification Language
Shortest Path Tree, a multicast term.
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.
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.
Software Quality Association in Denver
Short Range (a.k.a. short reach) optics use 1310nm and can drive a
10G signal up to 82 meters.
An IEEE optical interface type that supports 100G on multi-mode fiber over distances of 100 meters.
Shared Risx Link Group, an MPLS term
Solution Reference Network Design, a Cisco term for a class of documents. There is a SRND on Enterprise QoS and another SRND on Unified
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.
Surface and Sounding Systems Facility
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.
Shared Wireless Access Protocol
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.
A company that used to make hubs. Synoptics merged into Bay Networks.
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.