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shelf controller/fan controller. Combines shelf controller function and fan controller function on one card. Two are installed in each fabric chassis.
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shelf controller Gigabit Ethernet card. Gigabit Ethernet switch on a system controller card in the fabric chassis.
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Synchronous Digital Hierarchy. European standard that defines a set of rate and format standards that are sent using optical signals over fiber. SDH is similar to SONET, with a basic SDH rate of
155.52 Mbps, designated at STM-1.
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secure domain router. A collection of line cards and route processors that form a complete router. Each router contains its own instance of dynamic routing, IP stack, system database, interface manager, and event notification system.
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synchronous dynamic random access memory. A form of dynamic RAM that adds a separate clock signal to the control signals.
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The hardware component that manages the configuration and health of a fabric chassis within the Cisco CRS router.
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The shelf manager process runs on a router or switch, doing platform-dependent functions, including handling OIR events. Shelf manager is formerly called platform manager.
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Software Maintenance Upgrade. A "point fix" for a critical problem. SMUs are delivered as PIE files and are used to update software packages.
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Simple Network Management Protocol. SNMP is the protocol governing network management and the monitoring of network devices and their functions. It is not necessarily limited to TCP/IP networks.
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Simple Network Management Protocol Version 3. An interoperable standards-based protocol for network management. SNMPv3 provides secure access to devices by a combination of authenticating and encrypting packets over the network.
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A list of packages activated for a particular node. A software configuration consists of a boot package and additional feature packages.
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Synchronous Optical Network. A standard format for transporting a wide range of digital telecommunications services over optical fiber. SONET is characterized by standard line rates, optical interfaces, and signal formats. See also
SDH.
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service processor. An SP on each card maintains an internal management connection to the shelf controller for the rack. The SP is referred to in CLI commands to identify the nodeID for fabric, alarm and fan controller cards.
Example:
RP/0/RPO/CPU:router# admin show controllers fabric connectivity location 0/SM0/SP
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Synchronous Payload Envelope. Portion of the SONET frame containing overhead information (POH and user data).
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shortest path first. Routing algorithm that iterates on length of path to determine a shortest-path spanning tree. Commonly used in link-state routing algorithms. Sometimes called Dijkstra's algorithm.
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Secure Shell. A protocol that provides a secure remote connection to a router through a Transmission Control Protocol (TCP) application.
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secure socket layer. A secure socket between two entities with authentication.
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Denotes an inactive card or process that waits to become active; standby cards or processes are also sometimes denoted as backup.
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The router configuration designated to be applied on the next router startup.
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Virtual interfaces created on a hardware interface. These software-defined interfaces allow for segregation of traffic into separate logical channels on a single hardware interface and better utilization of the available bandwidth on the physical interface. |
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A switch between the active and standby cards. The switchover can be initiated by command, or it can occur automatically when the active card fails.
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Soft reset of a router node. This involves restarting all processes running on that node.
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