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Cisco MGX 8800 Series Switches

Cisco MGX 8850 AXSM-E Enhanced ATM Switching Module

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CISCO MGX 8850 AXSM ENHANCED ATM SWITCHING MODULE

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.

Notice: Extra physical ports are provided on some AXSM-E card types in order to support maximum flexibility in bandwidth allocation and traffic separation. Unless blocking is acceptable, the total amount of bandwidth allocated to all ports on an AXSM-E card should not exceed 622 Mbps.

• 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

Type of Back Card

T1

E1

Port Speed

1.544 Mbps

2.048 Mbps

Cell Transfer Delay

3623 cells/sec

4528 cells/sec (G.704), 4830 cells/sec (clear channel)

Number of Ports/AXSM

32

32

Number of Ports/Back card

16

16

Line Coding

B8ZS

HDB3

Line Framing

ANSI T1.408 extended Super Frame format line framing

ITU-T G.704 16 frame multiframe line framing and clear channel

Port Media

100 ohm twisted pair

120 ohm twisted pair

Port Connector

RJ-48

RJ-48, SMB

Cell Mapping

Direct

Direct

Redundancy

1:1, Y-cable

1:1, Y-cable

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

Type of Back Card

T3

E3

Port Speed

44.736 Mbps

34.368 Mbps

Cell Transfer Rate

104,268 cells/sec (ADM mode), 96,000 cells/sec (PLCP mode)

80,000 cells/sec

Number of Ports/AXSM

16

16

Number of Ports/Back card

8

8

Line Coding

B3ZS

HDB3

Line Framing

ANSI T1.107, T1.107a

ITU-T G.804, G.832

Port Media

75 ohm coaxial

75 ohm coaxial

Port Connector

SMB

SMB

Cell Mapping

PLCP (for cbit framing)

Direct

Direct

Redundancy

1:1, Y-cable

1:1, Y-cable

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

Type of Back Card

STM-1 Electrical

MMF

SMF-IR

SMF-LR

Port Speed

155 Mbps

155 Mbps

155 Mbps

155 Mbps

Cell Transfer Rate

353,208 cells/sec

353,208 cells/sec

353,208 cells/sec

353,208 cells/sec

Number of Ports/AXSM

8

8

8

8

Number of Ports/Back card

4

4

4

4

Port Media

75-ohm coaxial

MMF

SMF

SMF

Port Connector

SMB

MT-RJ

SC

SC

Optics

 

Laser 1310nm

Laser 1310nm

Laser 1310nm

Tx Power Level (dBm)

 

-15 min

-8 max

-15 min

-8 max

5 min

0 max

Rx Power Level (dBm)

 

-23 min

-8 max

-28 min

-8 max

-34 min

-10 max

Typical Reach/km

 

2

15

40

Redundancy

1:1, Y-cable, 1+1

1:1 APS

1:1, 1+1

1:1 APS

1:1, Y-cable,1+1

1:1 APS

1:1, Y-cable, 1+1

1:1 APS

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

Type of Back Card

SMF-IR

SMF-LR

Port Speed

622 Mbps

622 Mbps

Cell Transfer Rate

1,412,832 cells/sec

1,412,832 cells/sec

Number of Ports/AXSM

4

4

Number of Ports/Back card

1

1

Port Media

SMF

SMF

Port Connector

SC

SC

Optics Laser

1310 nm

Laser 1310 nm

Tx Power Level (dBm)

-15 min

-8 max

-3 min

+2 max

Rx Power Level (dBm)

-28 min

-8 max

-28 min

-8 max

Typical Reach/km

15

40

Redundancy

1:1, Y-cable, 1+1 and 1:1 APS

1:1, Y-cable, 1+1 1:1 APS

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)