Cisco Systems IGX 8400 Introduction to the UXM-E Trunk Mode, Universal Switching Module Enhanced

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Universal Switching Module Enhanced

Universal Switching Module Enhanced

This description of the universal switching module (UXM-E) covers the following topics:

•An introduction includes sections on the UXM-E mode of operation, trunk-mode features, interface card list, card redundancy, card mismatch, clock sourcing, cellbus bandwidth usage, configuration for public ATM network service, and configuration for cell trunk-only routes

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Supported traffic and connection types

Inverse multiplexing over ATM (IMA)

Activation and configuration of a UXM-E for trunk-mode operation

Supported traffic and connection types

Alarms for physical lines and logical (IMA) trunks

Descriptions of the faceplates on the back cards

The universal switching module (UXM-E) can function in one of two modes. In trunk mode, the UXM-E supports trunks in the network. In port mode, it as either an ATM User-to-Network Interface (UNI) or a Network-to-Network interface (NNI). The back cards support multiple ports operating at OC3/STM1, T3, E3, T1, or E1 rates.

Note The word “port” has two uses in a Cisco WAN switch. “Port mode” refers to the function of an interface at the edge of a network—the endpoint at which you add connections (UNI) or the interface between two networks (NNI). Examples of port cards are the UVM, UFM, ALM/A, and port-mode UXM-E in an IGX switch or an ASI in a BPX switch.

On the other hand, a “port” is also a layer of logical functionality that applies to port cards as well as trunk cards. For example, whether you activate a line to a router or activate an ATM trunk to the network, you must subsequently configure the logical port in either case.

For a UXM-E, therefore, the documentation describes a logical “port” on a port-mode UXM-E for a UNI or NNI at the edge of a network, yet it also refers to a “port on a UXM-E trunk” as a layer of logic.

Introduction to the UXM-E Trunk Mode

The UXM-E can transport ATM cells to and from the cellbus at a maximum rate of 310 Mbps in either direction. The UXM-E can support up to 8000 total connections in trunk mode.

Note The UXM-E in trunk mode cannot support more than 4000 gateway connections. All remaining connections can be either user or networking connections. For example, if you configure 2500 gateway connections, you still have 5500 connections available to be used for user or networking connections.

The UXM-E communicates only ATM cells to either the network or the CPE. On the cellbus, however, the UXM-E communicates either ATM cells or FastPackets according to the card type. With another UXM-E, it communicates only in ATM cells. With other cards, the UXM-E communicates in FastPackets. Through its gateway functionality, the UXM-E translates between FastPackets and ATM cells so it can transport voice, data, or Frame Relay traffic that other cards have put in FastPackets.

4-4Cisco IGX 8400 Series Reference

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Contents Trunk Cards Trunk Interface Cards Trunk Front Cards Card Acronym Card NameTrunk Operating Modes Trunk Card MaintenanceLoopback Test Introduction to the UXM-E Trunk Mode Universal Switching Module EnhancedDetermining the UXM-E’s Mode of Operation Example Networks with UXM-EsUXM-E Trunk Features UXM-Es in a Network with Heterogeneous TrafficBack Cards for the UXM-E UXM-E InterfacesCard Name Card Description UXM-E Front Card Switchover to a Redundant UXM-E Maximum Number of UXM-EsCabled UXM-E Redundancy UXM-E Status LEDs Fail Active Standby Status of CardCard Mismatch Cellbus Bandwidth UsageUXM-E as a Clock Source Planning for Cellbus Bandwidth Allocation OC3Calculating Cellbus Bandwidth Changes ATM Across a Public ATM NetworkUXM-E in Trunk Mode Routing over Cell Trunks OnlyTypes of Supported Traffic Traffic from FastPacket-Based Cards Traffic TypeTypes of Connections on a UXM-E Trunk Inverse Multiplexing over ATM on IGX TrunksAdding an IGX Feeder Adding and Removing IMA Group Links Line RedundancyIMA Protocol Two-Segment ConnectionsRouting Feeder Connection Cell Endpoint a Endpoint B Type Gateway Type Routing Load TypeThree-Segment Connections Feeder Connection Cell Endpoint a Endpoint B TypeRT-VBR Gwtypenone ABR.FST GwtypenoneUXM-E Atfr Activation and Configuration of a UXM-E in Trunk ModeOC3 STM1 SMF 20Cisco IGX 8400 Series Reference Alarms for Physical Lines and Logical Trunks SCR and PCR Policing at Less than 50 CPS on UXM-EBXM IGX-UXM-ETrunk Statistics for Troubleshooting 10 PCR Policing Application ExampleSummary Statistics UXM-E Interface CardsConnector/Indicator Function Connectors and LEDs for SMF and MMF Back CardsOC-3/STM1 Back Cards 11 BC-UAI-4-155-SMF Faceplate T3 Back Cards 12 BC-UAI-2-155-SMF FaceplateConnectors/Indicator Function Connectors and LEDs for BC-UAI-6-T3 and BC-UAI-3-T3BC-UAI-6-T3 Faceplate E3 Back Cards 14 BC-UAI-3-T3 FaceplateConnectors and LEDs for BC-UAI-6-E3 and BC-UAI-3-E3 BC-UAI-6-E3 FaceplateT1 Back Cards 16 BC-UAI-3-E3 FaceplateBC-UAI-8-T1-DB-15 Faceplate E1 Back Cards 18 BC-UAI-4-T1-DB-15 FaceplateBC-UAI-8-E1 DB-15 Faceplate Port 21 BC-UAI-4-E1 DB-15 Faceplate 22 BC-UAI-4-E1 BNC Faceplate NTM Status Cable Redundancy for the NTMNetwork Trunk Module T1 Interface Card BC-T1 BC-T1 Faceplate Description23 BC-T1 Faceplate BC-T1 Connections and Status LEDsE1 Interface Back Card BC-E1 BC-E1 Connections and Status LEDs RX-TXSubrate Interface Card BC-SR Connection/Indicator Function BC-SR Connections and Status LEDsY1 Interface Back Card BC-Y1 RX MON BC-Y1 Connections and Status LEDsTX MON 46Cisco IGX 8400 Series Reference
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