Data Sheet

Cisco MGX PXM-1
Processor Switch Module

The Cisco MGX PXM-1 Processor Switch Module is a combination ATM switching fabric, data processing, and ATM interface card used on the Cisco MGX 8230, 8250, and 8850 switches. The Cisco MGX PXM-1 Module combines a 1.2-Gbps shared-memory switching fabric with integrated trunking at speeds up to OC-12. The switching fabric provides 1.2 Gbps of nonblocking switching capacity, while the processor provides the control plane that delivers advanced IP+ATM networking software, diagnostics, and performance monitoring.

Key Features

• Integrated switching, processing, and broadband interfaces, which provide high-performance switching and trunking on a single card
  
  
• Route Processor Module (RPM) 1: Redundancy
  
  
• 1.2 Gbps nonblocking switching
  
  
• Integrated T3/E3, OC-3c/STM-1, OC-12c/STM-4 ATM trunking
  
  
• Linear automatic protection switching (APS) for the Synchronous Optical Network (SONET) interfaces
  
  
• Hot card insertion/removal
  
  
• 1:1 hot-standby redundancy
  
  
• User-selectable primary and secondary clock sources with graceful switchover
  
  
• Internal Stratum-4 or optional Stratum-3, external building integration timing supply (BITS), or inband clock sources
  
  
• Inband management or out-of-band via EIA/TIA-232 or 10BaseT control ports
  
  
• Narrowband service modules
  
  
• Broadband trunking support
  
  
• Support for DS0 to OC-12c/STM-4 interfaces
  
  

Figure 1: Cisco MGX 8850 PXM-1 Processor Switch Module

The Cisco PXM-1 and MGX Universal Chassis provides a unified IP+ATM architecture that can deliver multiple services, from Frame Relay and circuit emulation services to IP VPNs, on a single chassis.

The Cisco MGX PXM-1 Module combines ATM switching and ATM trunking on a single card. The Cisco MGX PXM-1 trunk and UNI ports operate at the standard T3/E3 and SONET/Synchronous Digital Hierarchy (SDH) rate of 155.520 or 622.08 Mbps.

Technical Specifications

ATM Switch Fabric Card

• Resides in slots 1 and 2 of the Cisco MGX 8230
  
  
• Resides in slots 7 and 8 of the Cisco MGX 8850 and 8250
  
  
• Supports hot insertion and removal
  
  
• Supports 1:1 hot-standby redundancy
  
  
• Offers R4700 MIPS CPU
  
  
• Offers 1.2 Gbps worth of nonblocking switching
  
  
• Provides 2.1-multigigabit hard drive
  
  
• Provides full environmental monitoring of cabinet temperature, cooling fan speeds, and supply voltages
  
  
• Provides four LED indicators
  
  
  • Card status
    
    
  • Major/minor network alarms
    
    
  • LAN control port activity detect
    
    
  • DC power status
    
    

Supports two back cards:

• Upper back card supports the following functions:
  
  

  User and management interfaces

• EIA/TIA-232 control port
  
  
• EIA/TIA-232 maintenance port
  
  
• 10BaseT Ethernet port
  
  

  Network synchronization for the shelf

• T1/E1 BITS synchronization port
  
  
• Stratum-4E clocking
  
  
• Stratum-3 clocking (optional)
  
  
• Conformance to ATT Pub. 62411
  
  

  Central office-compatible major/minor alarm interface

• DB-15 connector
  
  
• Major alarm audio
  
  
• Major alarm visual
  
  
• Minor alarm visual
  
  

• Lower back card provides one of the following ATM interfaces:
  
  
  • Two-port T3/E3
    
    
  • Four-port OC-3c/STM-1
    
    
  • One-port OC-12/STM-4
    
    

Physical-Layer T3/E3 Interface

• Two T3/E3 ports
  
  
• Complies with ATM Forum UNI Specification Versions 3.0, 3.1
  
  
• 1:1 PXM1 redundancy
  
  

Physical Layer OC-3c STM-1 Interface

• Four OC-3c/STM-1 (155.520-Mbps) ports
  
  
• Trunk or port interface mode
  
  
• Cell transfer rate of 353,208 cells per second
  
  
• Compliant with SONET standards
  
  
  • Bellcore GR-253-CORE
    
    
  • ANSI T1.105
    
    
• Compliant with SDH standards
  
  
  • ITU-T G.707, G. 708, and G.709
    
    
  • ITU-T G. 957, G.958
    
    
  • ITU-G.783 Annex-A
    
    
• 1:1 PXM1 redundancy
  
  
• ITU-G.783 Annex-A
  
  

Physical Layer OC-12c/STM-4 interface

• One OC-12c/STM-4 (622.08-Mbps) port
  
  
• Cell transfer rate of 1,412,832 cells per second
  
  
• Compliant with SONET standards
  
  
  • Bellcore GR-253-CORE, TR-TSY-000020
    
    
  • ANSI T1.105
    
    
• Compliant with SDH standards
  
  
  • ITU-T G.707, G.708, and G.709
    
    
  • ITU-T G.957, G.958
    
    
  • ITU G.783 Annex-A
    
    
• 1:1 PXM1 redundancy
  
  
• OC-12 fiber-optic interface options
  
  

ATM Layer

• Configurable for trunk and public or private User-Network Interface (UNI) application
  
  
• UNI compliant to ATM Forum UNI Specifications V.3.0 and V.3.1, and ITU-T I.361 and I.432 specifications
  
  
• Complies with standard usage parameter control (UPC) and connection admission control (CAC) per ATM Forum UNI Specification V.3.1 and ITU-T I.371
  
  
• Supports virtual circuit connections (VCCs) and virtual path connections (VPCs) per ATM Forum UNI Specification V.3.1 and ITU-T I.371
  
  
• Connections
  
  
  • 16,000 connections per chassis
    
    
  • 4,000 UNI connections per card
    
    
• Virtual path identifier/virtual channel identifier (VPI/VCI) range for VCCs and VPCs: per UNI Specification 3.1
  
  

Traffic Management

• CBR, rt-VBR, nrt-VBR, UBR, ABR-STD, ABR-FST
  
  
• Up to 16 classes of service (CoSs) with the following configurable parameter
  
  
  • Service priority level (SPL)
    
    

Virtual Trunks

• Support for up to 32 virtual interfaces per card, each with 16 CoS queues
  
  
• VPI/VCI used to identify virtual connection
  
  
• Virtual interface parameters:
  
  
  • Physical port (trunk or UNI)
    
    
  • Peak service rate (PSR)
    
    
  • Maximum service rate
    
    
  • Maximum resource allocation
    
    

Cell Buffering

• Large ingress and egress cell buffer architecture
  
  
• 128,000 cells stored per card
  
  
  • Accommodate large traffic bursts
    
    
  • Avoid network congestion and cell discard
    
    
  • Suited to TCP/IP traffic
    
    

Intelligent Quality-of-Service Management Suite

Advanced CoS Management

• Up to 16 CoS queues, with independent service algorithms dedicated to each interface in the network
  
  

Optimized Bandwidth Management

• Dedicated queue- and rate-controlled servers for each VCC/VPC
  
  
• Dynamic bandwidth management, providing more than 95-percent utilization
  
  

Network Management

• Management using Cisco WAN Manager Software 10.4.10 supports software release 1.1.40 only when deployed with 1.1.34 features.
  
  
• CiscoView for equipment management
  
  
• Simple Network Management Protocol (SNMP) based for configuration and statistics collection
  
  
• Graphical user interface
  
  

Physical Specifications

• Dimensions: (H x D) 15.83 x 15.65 in.
  
  

Electrical Specifications

• Input power required: -48 VDC
  
  
• Power consumption: 100W
  
  

Electrical and Safety Standards Compliance

• EMI/ESD compliance
  
  
  • FCC Part 15
    
    
  • Bellcore GR1089-CORE
    
    
  • IEC 801-2
    
    
  • EN55022
    
    
• Safety compliance
  
  
  • EN 60950
    
    
  • UL 1950
    
    
• Bellcore NEBS: Level 3 compliant
  
  
• Optical safety: IEC 825-1 (Class 1)