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This glossary defines terms and acronyms that are relevant to the Service Expansion Shelf (SES) and its two current applications: SES as IGX feeder and SES as BPX PNNI controller. For a complete glossary of terms and acronyms, refer to the Cisco Internetworking Terms and Acronyms document which can be found on the Cisco Web or on the Cisco Documentation CD-ROM.
ABR
Available Bit Rate is a Class of Service defined for ATM connections by the ATM Forum. Devices using ABR are guaranteed no more than a certain rate of throughput. This rate dynamically changes and the current value is relayed to the sending device by way of Resource Management (RM) cells.
Annex G
A bidirectional protocol, defined in Recommendation Q.2931, used for monitoring the status of connections across an UNI interface. The BPX SES PNNI controller uses the Annex G protocol to pass connection status information between a itself and the BPX 8600 switch.
BCC
The switch control card in the BPX is the Broadband Control Card, which has a 68040 processor.
BPX switch
The Broadband Packet Exchange (BPX) is Cisco's high-end ATM switch developed for the service provider market. The BPX 8600 series switch is a carrier-quality switch, with trunk and CPU hot standby redundancy.
BPX SES PNNI Controller
A Service Expansion Shelf outfitted with two Processor Switch Modules (SES-PXMs) running PNNI and ATM SVC software. In this application, the PBX SES PNNI Controller is attached to and controls the BPX switch to provide PNNI networking and ATM SVCs.
BXM
The Broadband Switch Module (BXM) cards are ATM port cards for the BPX switch which use the Monarch chip set.
Cell bus
The Cell bus in the SES is the way that the service modules exchange data with the switching fabric on the SES-PXM.
Cisco View
GUI-based device-management software application that provides dynamic status, statistics, and comprehensive configuration information for Cisco internetworking products, such as the SES or IGX switch or BPX switch.
Cisco WAN Manager
Class of Service (CoS) Buffer
A buffer or queue which serves connections with similar QoS requirements.
Class of Service (CoS) Buffer Descriptor Template
A component of a Service Class Template which contains Class of Service Buffer configurations indexed by CosB number. Note: A Qbin is a platform-specific (BXM in this case) instance of the more general Class of Service Buffer (or CosB).
CommBus
The CommBus is the BPX's internal messaging bus.
Community
In the context of SNMP, a relationship between an agent and a set of SNMP managers that defines security characteristics. The community concept is a local one. defined at the agent. The agent establishes one community for each desired combination of authentication, access control, and proxy characteristics. Each community is given a unique (within this agent) community name, and the management stations within that community are provided with and must employ the community name in all get and set operations. The agent may establish a number of communities, with overlapping management station membership.
Enterprise MIB
A MIB module defined in the enterprise-specific portion of the Internet management space
ESP
The Extended Services Processor (ESP) is an early product which provided PNNI and ATM SVCs for the BPX wide area networks. The ESP, which was SPARC-based, is being replaced by the SES PNNI controller for the BPX switch.
Feeder
IGX switch
Managed device
A device containing a network management agent implementation.
MIB
Management Information Base, a structured set of data variables, called objects, in which each variable represents some resource to be managed.
MIB-II
Internet-standard MIB, RFC 1213
PXM
Processor Switch Module. The processor card used in MGX 8850 series switches. The SES-PXM is the processor used in the SES product. Although functionally equivalent to a PXM, the SES-PXM is not interchangeable with a PXM and will not fit in an MGX 8850 card slot.
Qbin
A Qbin is a platform-specific (BXM in this case) instance of the more general Class of Service Buffer (or CosB).
Routing Node
In tiered networks terminology, a Routing Node is a larger switch to which one or more Feeders or controllers are attached. The IGX switch serves as the routing node for an SES feeder.
Service Expansion Shelf
See SES.
SES (Service Expansion Shelf)
An 7-slot chassis build with MGX-8850-style architecture that can currently be used as either a feeder shelf for the IGX or as a PNNI controller for the BPX. When the SES is used as an IGX feeder it supports MGX 8850 service modules. When the SES is used as an BPX PNNI controller, it only contains two processor modules (SES-PXMs) that run the PNNI networking and ATM SVC software.
SES-PXM
The Service Expansion Shelf (SES) Processor Switch Module is the processor module used in the SES product. Although functionally equivalent to a PXM (the processor module used in the MGX 8850 switch), the SES-PXM is not interchangeable with a PXM and will not fit in an MGX 8850 card slot. Also see PXM.
SNMP
Simple Network Management Protocol.
UBR
Unspecified Bit Rate is a Class of Service for ATM networks defined by the ATM Forum. Traffic in the UBR class is not guaranteed any particular throughput or delay performance. In this regard, UBR is similar to `traditional' IP service.
The backcard that mates with an SES-PXM and provides ATM trunking. The SES supports only an OC-3 uplink backcard.
The backcard (PXM-UI) that mates with the SES-PXM and provides interfaces for control or maintenance terminals, LAN connections, T1 or E1 clock inputs, and alarm outputs.
Virtual Switch Interface
See VSI.
VSI
Virtual Switch Interface is a master/slave protocol that allows Cisco WAN switches, such as the BPX 8600 series switch or the MGX 8850 node, to be controlled by more than one network applications. PNNI, MPLS, or AutoRoute are examples of network applications.
A controller, such as a PNNI SVC Controller or Tag Switch Controller, which controls a switch using the VSI.
VSI Master
A VSI Master process implementing the master side of the VSI protocol in a VSI Controller. Sometimes the whole VSI Controller might be referred to as a `VSI Master', but this is not strictly correct. The SES-PSM in the PNNI controller application functions as a VSI master.
VSI Platform
A VSI Platform is a switch with one or more VSI Slaves allowing connections to be set up using the VSI.
VSI Slave
A VSI Slave process implementing the slave side of the VSI protocol within a VSI Platform. Sometimes a whole VSI Platform might be referred to as a `VSI Slave', but this is not strictly correct.
Posted: Thu Mar 30 19:27:02 PST 2000
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