Product Overview

The Cisco ONS 15540 ESPx (Extended Services Platform External) are optical transport platforms that employ DWDM (dense wavelength division multiplexing) technology. With the Cisco ONS 15540 ESPx, users can take advantage of the availability of dark fiber to build a common infrastructure that supports data, SAN (storage area network), and TDM (time-division multiplexing) traffic. For more information about DWDM technology and applications, refer to the
Introduction to DWDM Technology publication and the Cisco ONS 15540 ESPx Planning Guide.

Note

To ensure the installed Cisco IOS software supports your hardware and provides the software features you wish to use, see the "New and Changed Information" section on page xv. Also refer to the "Hardware Supported" section and "Feature Set" section of the latest release notes for the Cisco ONS 15540 ESPx.

Cisco ONS 15540 ESPx Hardware Features

This section describes the hardware features and components of the Cisco ONS 15540 ESPx.

Chassis Overview

The Cisco ONS 15540 ESPx uses a 12-slot modular vertical chassis. As you face the chassis, the two leftmost slots (slots 0 and 1) hold the optical mux/demux motherboards, which are populated with optical mux/demux modules. Slots 2 through 5 and 8 through 11 hold the line card motherboards, which are populated with transponder modules. Slots 6 and 7 hold the processor cards (see Figure 1-1). Air inlet, fan tray, and cable management are located beneath the modular slots. The system has an electrical backplane for system control.


1	Slots 0 and 1 hold the mux/demux motherboards	5	Cable management tray
2	Slots 2 to 5 hold the line card motherboards	6	Cable storage drawer
3	Slots 6 and 7 hold the processor cards	7	8-channel cross connect drawer
4	Slots 8 to 11 hold the line card motherboards	8	8-channel cross connect drawer

Component Summary

The Cisco ONS 15540 ESPx supports the following hot-swappable modular hardware components:

•

2.5-Gbps line card motherboards—Up to eight in a system, each of which accepts up to four transponder modules and provides an optical connection on the front panel that carries the channel signals to and from the transponder modules. The Cisco ONS 15540 ESPx supports two types of line card motherboards: splitter protected and unprotected. The splitter protected line card motherboard has two optical connections on the front panel; the unprotected line card motherboard has only one.

•

10-Gbps line card motherboards—Up to eight in a system, each of which accepts two 10-GE transponder modules and provides an optical connection on the front panel that carries the signal to and from the mux/demux card. The Cisco ONS 15540 ESPx supports two types of line card motherboards: splitter protected and unprotected. The splitter protected motherboard has two optical connections on the front panel; the unprotected motherboard has only one.

•

2.5-Gbps transponder modules—Up to four per line card motherboard. Each transponder module has a single external interface to the client side and an internal interface that connects to the line card motherboards. The transponder modules are hot pluggable, permitting in-service upgrades and replacement. The transponder modules transmit the ITU wavelength, or channel, to the mux/demux modules through the optical connection on the front panel on the line card motherboard.

•

10-GE transponder modules—Two can be installed in the 10-Gbps line card motherboard. Each 10-GE transponder module has a single external interface to the client side and an internal interface that connects to the 10-Gbps line card motherboard. This interface can connect to the Cisco ONS 15530 or any other native 10-GE interfaces. The 10-GE transponder modules are hot pluggable, permitting in-service upgrades and replacement.

•

Optical mux/demux motherboards—Up to two per system, depending on the number of channels supported and the type of protection. The mux/demux motherboard accepts up to four mux/demux modules.There are two types of mux/demux motherboard, with and without OSC support.

•

Optical add/drop mux/demux modules—Up to four per mux/demux motherboard. Each add/drop mux/demux module can multiplex and demultiplex a band of 4 or 8 channels, for a maximum of 32 channels. Channels not filtered by the OADM module are passed on to the next add/drop mux/demux module.

•

Optical terminal mux/demux modules—One per mux/demux motherboard. Each terminal mux/demux module can multiplex and demultiplex a band of 32 channels. All of the channels received by the terminal mux/demux modules are terminated, none are passed through.

•

Protection switch module—One per shelf. The PSM provides trunk fiber protection for Cisco ONS 15540 ESPx systems configured in point-to-point topologies. The PSM sends the DWDM signal from the OADM to both the west and east directions. It receives both the west and east signals and selects one to send to the OADM module. When a trunk fiber cut occurs on the active path, the PSM switches the received signal to the standby path.

•

Processor cards—Two per system for fault tolerance. The processor cards provide system processing, redundancy arbitration, clocking, and other central functions.

•

Cross connect drawers—Up to four per system. The cross connect drawers provides the flexibility to add and drop less than four channels in a band while passing the remaining channels through to another node in the network. Each cross connect drawer supports up to 8 channels.

Transponder Modules

In the transponder module, the client signal is converted into an ITU-compliant wavelength, which is cross-connected to the mux/demux modules. You can populate the line card motherboard subcard slots with as few or as many transponder modules as required (up to 32) to support the desired number of client signals, or data channels.

All client signals are supported in 3R (reshape, retime, retransmit) mode, regardless of protocol encapsulation type.

The Cisco ONS 15540 ESPx supports the following types of single interface transponder modules:

SM Transponder Modules

SM transponder modules have fixed, nonpluggable transceivers for the single client interface. SM transponder modules accept SM client signals on the 1310-nm wavelength through an SC connector and support client signal clock rates ranging from 16 Mbps to 2.5 Gbps.

On the trunk side, the SM transponder modules have output (laser) power in the range of 4 to 8 dBm and receive (detector) sensitivity of -28 dBm. For more information on power budget planning, refer to the Cisco ONS 15540 ESPx Planning Guide. For power budget specifications for individual components, refer to the Cisco ONS 15540 ESPx Hardware Installation Guide.

The following protocol encapsulation types are supported in 3R mode plus protocol monitoring:

The following protocol encapsulation types are supported in 3R mode without protocol monitoring:

The SM transponder modules also support the OFC (open fiber control) safety protocol for Fibre Channel, ISC compatibility mode, and FICON.

MM Transponder Modules

MM transponder modules have fixed, nonpluggable transceivers for the single client interface. MM transponder modules accept both SM client signals and MM client signals on the 1310-nm wavelength through an SC connector and support client signal clock rates ranging from 16 Mbps to 622 Mbps.

On the trunk side, the MM transponder modules have output (laser) power in the range of 4 to 8 dBm and receive (detector) sensitivity of -28 dBm. For more information on power budget planning, refer to the Cisco ONS 15540 ESPx Planning Guide. For power budget specifications for individual components, refer to the Cisco ONS 15540 ESPx Hardware Installation Guide.

The following protocol encapsulation types are supported in 3R mode plus protocol monitoring:

The following protocol encapsulation types are supported in 3R mode without protocol monitoring:

Type 2 Extended Range Transponder Modules with SFP Optics

On the trunk side, the Type 2 extended range transponder modules have output (laser) power in the range of 5 to 10 dBm and receive (detector) sensitivity of -28 dBm. For more information on power budget planning, refer to the Cisco ONS 15540 ESPx Planning Guide. For power budget specifications for individual components, refer to the Cisco ONS 15540 ESPx Hardware Installation Guide.

Fixed rate SFP optics modules support specific protocols. Table 1-1 lists the features for the fixed rate SFP optics supported by the Type 2 extended range transponder modules.

Table 1-1 Fixed Rate SFP Optics Features
Part Number	Supported Protocols	Fiber Type	Wavelength	Connector Type
15500-XVRA-01A2	ESCON, SONET OC-3 SR, SDH STM-1	MM 50/125 �m MM 62.5/125 �m	1310 nm	MT-RJ
15500-XVRA-02C1	Gigabit Ethernet¹, Fibre Channel (1 Gbps)²	MM 50/125 �m MM 62.5/125 �m	850 nm	LC
15500-XVRA-02C2	Fibre Channel (1 Gbps and 2 Gbps)³	MM 50/125 �m MM 62.5/125 �m	850 nm	LC
15500-XVRA-03B1	Gigabit Ethernet⁴, Fibre Channel (1 Gbps)⁵	SM 9/125 �m	1310 nm	LC
15500-XVRA-03B2	Fibre Channel (1 Gbps⁶ and 2 Gbps⁷), ISC peer mode	SM 9/125 �m	1310 nm	LC
15500-XVRA-06B1	SONET OC-12 SR⁸, SDH STM-4	SM 9/125 �m	1310 nm	LC
15500-XVRA-07B1	SONET OC-48 SR, SDH STM-16	SM 9/125 �m	1310 nm	LC

¹1000BASE-SX

²FC-0-100-M5-SN-S and FC-0-100-M6-SN-S standards

³FC-0-200-M5-SN-S and FC-0-200-M6-SN-S standards

⁴1000BASE-LX

⁵FC-0-100-SM-LC-S standard

⁶FC-0-100-SM-LC-S standard

⁷FC-0-200-SM-LC-S standard

⁸SR = short range

Variable rate SPF optics modules support a range of clock rates. Table 1-2 lists features for the variable rate SFP optics supported by the Type 2 extended range transponder modules.

Table 1-2 Variable Rate SFP Optics Features
Part Number	Clock Rate Range	Protocol Encapsulations Supported	Fiber Type	Wavelength	Connector Type
15500-XVRA-10A1	Low-band 8 Mbps to 200 Mbps	Sysplex (CLO and ETR)¹ (8 Mbps), Fast Ethernet² (125 Mbps), SONET OC-3³ (155.52 Mbps), SDH STM-1 (622 Mbps), ESCON⁴ (200 Mbps)	MM 50/125 �m 62.5/125 �m	1310 nm	LC
15500-XVRA-10B1	Low-band 8 Mbps to 200 Mbps	Sysplex (CLO and ETR)¹ (8 Mbps), Fast Ethernet² (125 Mbps), SONET OC-3³ (155.52 Mbps), SDH STM-1 (155.52 Mbps), ESCON⁴ (200 Mbps)	SM 9/125 �m	1310 nm	LC
15500-XVRA-11A1	Mid-band 200 Mbps to 622 Mbps	ESCON⁴ (200 Mbps), SONET OC-12³ (622 Mbps), SDH STM-4 (622 Mbps)	MM 50/125 �m 62.5/125 �m	1310 nm	LC
15500-XVRA-11B1	Mid-band 200 Mbps to 1.25 Gbps	ESCON⁴ (200 Mbps), SONET OC-12³ (622 Mbps), SDH STM-4 (622 Mbps), FC⁴ (1.062 Gbps), GE⁴ (LX) (1.25 Gbps)	SM 9/125 �m	1310 nm	LC
15500-XVRA-12B1	High-band 1.062 Gbps to 2.488 Gbps	FC⁴ (1.062 Gbps and 2.125 Gbps), GE⁴ (LX) (1.250 Mbps), SONET OC-48 (2.488 Gbps), SDH STM-16 (2.488 Gbps), ISC peer mode (2.125 Gbps)	SM 9/125 �m	1310 nm	LC

¹Manchester coded

²4B/5B coded

³Scrambler 2^23-1

⁴8B/10B coded

Note

The Cisco IOS software only supports Cisco-certified SFP optics on the Type 2 extended range transponder module.

The following protocols can be monitored with the Type 2 extended range transponder modules:

The Type 2 extended range transponder modules also support the OFC (open fiber control) safety protocol for Fibre Channel.

10-GE Transponder Modules

The 10-GE transponder module occupies half the height of the chassis slot and supports the IEEE 802.ae specification for 10GBASE-LR interfaces. Up to two 10-GE transponder modules occupy a 10-Gbps line card motherboard.

Each 10-GE transponder module supports one client side and one trunk side interface. The client side is a short-reach 1310 nm interface and the trunk side interface is an ITU grid compliant long-reach interface. The transmitter supports a 1260 nm to 1355 nm wavelength range. The 10-GE transponder module is available in 32 versions, one for each of the 32 ITU wavelengths.

On the trunk side, the 10-GE transponder modules have output (laser) power in the range of 1 to 6 dBm and receive (detector) sensitivity of -22 dBm. For more information on power budget planning, refer to the Cisco ONS 15540 ESPx Planning Guide. For power budget specifications for individual components, refer to the Cisco ONS 15540 ESPx Hardware Installation Guide.

Network topologies that use 10-GE transponder modules might require Cisco ONS 15216 Dispersion Compensator Units.

Processor Cards

The Cisco ONS 15540 ESPx includes two processor cards for redundancy, one in active mode and the other in hot-standby mode. Each processor card has a number of subsystems, including a CPU, a clock subsystem, an Ethernet switch for communication between processors and with the LRC (line card redundancy controller) on the mux/demux and line card motherboards, and an SRC (switch card redundancy controller). The active processor controls the system. All motherboards in the system use the system clock and synchronization signals from the active processor. Interfaces on the processor cards permit access by 10/100 Ethernet, console terminal, or modem connections.

Standards Compliance

Cisco ONS 15540 ESPx Software Feature Overview

•

Processor redundancy provided by arbitration of processor status and switchover in case of failure without loss of connections.

•

Autosynchronization of startup and running configurations between redundant processor cards.

•

Support for per-channel APS (Automatic Protection Switching) in point-to-point and ring topologies using redundant subsystems that monitor link integrity and signal quality.

•

Trunk fiber based DWDM signal protection using APS in point-to-point topologies.

•

System configuration and management through the CLI (command-line interface), accessible through an Ethernet connection or console terminal.

•

Optical power monitoring on the trunk side of the transponder module, digital monitoring on both client and trunk sides of the transponder module, and per-channel transponder module in-service and out-of-service loopback (client and trunk sides).

•

Optional out-of-band management of other Cisco ONS 15540 ESPx systems on the network through the OSC (optical supervisory channel).

•

Support for network management systems that use SNMP. Its capabilities include configuration management, fault isolation, topology discovery, and path trace.

In-Band Message Channel

The in-band message channel establishes a method for providing OAM&P (operations, administration, management, and provisioning) functions in Ethernet packet-based optical networks without a SONET layer or SDH layer. The in-band message channel terminates with the data channel, not at each node as does the OSC, and provides management on a per wavelength basis.

Network Management Systems

The Cisco ONS 15540 ESPx is supported by the following network management systems:

Optical Supervisory Channel

The Cisco ONS 15540 ESPx supports an optional out-of-band management channel for communicating between systems on the network. Using a 33rd wavelength (channel 0), the OSC allows control and management traffic to be carried without a separate Ethernet connection to each Cisco ONS 15540 ESPx in the network. The OSC always terminates on a neighboring node. By contrast, data channels may or may not be terminated on a given node, depending on whether the channels on the mux/demux modules are treated as either express (pass-through) or add/drop channels.

•

CDP (Cisco Discovery Protocol) packets—Used to discover neighboring devices

•

OSCP (OSC Protocol) packets—Used to determine whether the OSC link is up using a Hello protocol

Note

When the OSC is not present, Cisco ONS 15540 ESPx systems can be managed individually by separate Ethernet connections.

The OSC uses a dedicated laser and detector on a mux/demux motherboard. The OSC is a full duplex channel that can use a single ring for transmit and receive.

Online Diagnostics

The Cisco ONS 15540 ESPx provides the following types of online diagnostic tests:

•

OIR (online insertion and removal) tests for motherboards, modules, and standby processors

Network Topologies

For more information on network topologies, refer to the Introduction to DWDM Technology publication and the Cisco ONS 15540 ESPx Planning and Design Guide. Also, for information about configuring network topologies, see "Configuring Point-to-Point Topologies," and "Configuring Ring Topologies"

Table Of Contents