The Cisco MGX 8850 AXSM Enhanced (AXSM-E) ATM Switching Module is a high-density, double height service module for use in the Cisco MGX 8850 Multiservice Switch in combination with the high-capacity PXM-45 processor switching module. The AXSM delivers connectivity from T1/E1 to OC-12c/STM-4. Up to 12 AXSM modules can be accommodated in the MGX 8850 to provide the aggregation required by service providers. The AXSM Enhanced ATM Switching Module, in conjunction with the PXM-45, AXSM (Broadband ATM Switch Service Module), and Route Processor Module (RPM), offers the industry's most advanced and reliable ATM networking features, such as Private Network-Network Interface (PNNI), switched virtual circuit/path (SVC/SVP), soft permanent virtual circuit/path (SPVC/SPVP), and Multiprotocol Label Switching (MPLS).
KEY FEATURES
• High scalability in interfaces speeds with T1/E1, T3/E3, OC-3c/STM-1, OC-12c/STM-4; each port on the AXSM-E can be configured for either trunk or access applications
• 622 Mbps maximum full-duplex bandwidth available per AXSM-E card without blocking.
• Support for all ATM service classes, with up to 16 classes of service (CoSs); supports carrier-class implementation of standards-based PNNI, SVC/SVP, SPVC/SPVP, and MPLS services
• Large cell buffers (half million cells), which help to maximize "goodput" performance during congestion, reducing the number of retransmits; the buffers are allocated dynamically, depending on connection resource needs, thereby optimizing use of system resources
• High reliability with hot-standby 1:1 AXSM-E card redundancy, 1:1 and 1+1 line redundancy using APS
Figure 1. Cisco MGX 8850 AXSM Enhanced ATM Switch Service Module
TECHNICAL SPECIFICATIONS
Physical-Layer Interface
T1/E1
• Ports and trunks supported on same AXSM module
• User-Network Interface (UNI) Specifications 3.0, 3.1
• PNNI Specification 1.0
• T1/E1 supports direct cell mapping per ITU-T G.804
• Onboard BERT testing features support:
–Per channel BERT
–ITU-T 0.151
–ITU-T 0.152
–ITU-T 0.153
–ITU-T 0.161
–Loopback on E1 lines (both endpoints of the loop must be configured on the same hardware, i.e. AXSM)
• Support for Long Haul and Short haul T1/E1
• T1 compliant with T1.101, T1.403
• E1 compliant with G.703
• Conforms to RFC2495
Table 1. AXSM-32-T1E1-E Module with IMA
T3/E3
• Ports and trunks supported on same AXSM module
• User-Network Interface (UNI) Specifications 3.0, 3.1
• PNNI Specification 1.0
• Conforms to G.703, Accunet45 specifications
• Conforms to RFC 2556
• E3 supports direct cell mapping per ATM standards G.832
Table 2. AXSM-16-T3E3-E Module
OC-3c/STM-1
• Ports and trunks supported on same AXSM module
• UNI Specifications 3.0, 3.1
• PNNI Specification 1.0
• Compliant with SONET standards
–Bellcore GR-253-CORE
–Conforms to ITU-T G.703
–ANSI T1.105
• Compliant with SDH standards
• ITU-T G.707, G.708, G.709
• ITU-T G.957, G.958
Table 3. AXSM-8-155-E Module
OC-12c/STM-4
• Ports and trunks supported on same AXSM module
• UNI Specifications 3.0, 3.1
• PNNI Specification 1.0
• Compliant with SONET standards
–Bellcore GR-253-CORE, TR-TSY-000020
–ANSI T1.105
–ITU-T G.703
• Compliant with SDH standards
–ITU-T G.707, G.708, G.709
–ITU-T G.957, G.958
Table 4. AXSM-2-622-E Module
Network Synchronization
• Can be configured for internal timing from the internal PXM-45 Stratum 3 clock
• System clock synchronization to any service module port from line interface
• Looped line clock support
ATM Layer
• Configurable for trunk, NNI or UNI application
• Conformant to ATM Forum UNI 3.0, 3.1 specification, ITU-T I.361 and I.432 specifications
• Supports up to 16 CoSs and includes all ATM Forum traffic type services: ABR, UBR, VBR-nrt, VBR-rt, CBR; ABR supported for EFCI, RM marking, and ER stamping; support for IP quality of service
• ABR with Virtual Source/Virtual Destination (VS/VD)
• Early packet discard (EPD) and partial packet discard (PPD)
• Per Vc queuing for traffic scheduling
• Per Vc Traffic shaping on egress
• Per Vc policing
• 32 Virtual interfaces on egress
• Support for Virtual Path Termination
• Support for ILMI 4.0
• Complies with standard usage parameter control (UPC) per ATM Forum UNI 3.x, TM 4.0, and ITU-T I.371
• Support for virtual circuit connections (VCCs) and virtual path connections (VPCs)
• Virtual path identifier (VPI) and virtual circuit identifier (VCI) range for VCCs and VPCs per UNI 3.1
• Support for virtual circuit (VC) merge for egress and multipoint connections
• Usage policing supported on all interfaces
• Supports up to 60,000 total connections (VPCs and/or VCCs)
Virtual Trunks
• Supports maximum of 32 virtual interfaces per module; the interfaces can be ports, trunks, or virtual trunks; each virtual interface supports 16 CoS queues
Cell Buffering
• Supports half million cells of buffering to accommodate large traffic bursts, avoid network congestion, and cell discard; suitable for TCP/IP traffic
Support for Dynamic Routing Using PNNI 1.0
• Offers automatic end-to-end connection management mechanism
• Deterministically allocates bandwidth and reroutes connections autonomously over optimum network paths
• Preserves service integrity during network failure
• Offers E.164/NSAP addressing
• Offers support for SVC/SVP, SPVC/SPVP, MPLS link-state packets (LSPs)
• Offers QoS-based routing
Enhanced Call Admission Control
• A user-programmable enhanced connection-admission control (E-CAC) feature decides whether to admit or deny connections based upon the requested quality of service
Statistics
• Statistics supported using user-configurable bucket intervals
• Billing statistics supported on T1/E1, T3/E3, OC-3c/STM-1, and OC-12c/STM-4 interfaces
• Diagnostic statistics available per interface, CoS queues, and connections
• Multilevel Statistics Support
–Level 2 connection statistics supports 60,000 connections with up to 35 stats/connection
–Level 3 connection statistics supports 32,000 connections with up to 47 stats/connection
OAM
• OAM functionality per ITU-T I.610
• F4 to F5 fault propagation
• Inband diagnostics support using loopback cells
• Inband continuity check and automatic fault reporting for PVCs
• Loopback facility supported for diagnostics and self-test purposes
Network Management
• Management using Cisco WAN Manager software suite
• Based on Simple Network Management Protocol (SNMP) version 1.0 and 2.0
Reliability
• Greater than 75,000 hours MTBF
Physical Specifications
• Dimensions: (H x D) 15.83 x 15.65 in.
Electrical Specifications
• Input power required: 48 VDC
• Power consumption: 95W
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)