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DarkStar User Guide
2: Hardware
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2.3 Optical Configuration
This section describes the optical modules and interfaces within a DarkStar system. Modules, interfaces, and interface
connections are provisioned through software. For information related to optical interface configuration and management,
see Chapter 3 - Software.
2.3.1 Optical Modules
DarkStar systems include optical ports for the client interfaces and the line/band interface. DarkStar product-qualified lasers
used in these ports may be obtained directly from XKL.
2.3.1.1 Wave Laser Module
Wave laser modules are located inside DarkStar systems beneath the top access panel of the chassis. On DXM systems, wave
laser modules are DWDM XFP transceivers. On DSM systems, wave laser modules are DWDM SFP+ transceivers. A wave
module has no external port; each wave interface connects one client interface to a specific optical channel within the line/
band interface.
2.3.1.2 Client Laser Module
Client laser modules serve ports located on the front panel of DarkStar systems and are used to connect customer optical
equipment to a DarkStar network. After fiber connection, the client interface is software-configured to match the customer
equipment encapsulation.
2.3.1.3 OSC Laser Module
The OSC laser module is located beneath the top access panel of the DarkStar system chassis.
2.3.2 Optical Provisioning
Optical interfaces are software-configurable. You use the DXMOS
interface
command to configure each wave and client
interface, and to assign a wave interface to each client interface. Connections must be established physically first, and then
configured in DXMOS, as detailed in the Physical Provisioning section of Chapter 3 - Software.
DarkStar systems are preconfigured to operate at specific optical wavelengths, which in turn determines the channel assigned
to each wave laser. Channel assignment is fixed at the time the system is built. Refer to Laser Interface Operational Specifica-
tions in Chapter 3 - Software.
The OSC interface requires a static IPv4 or IPV6 address sharing the same IP subnet as the adjacent OSC port on the remote
DarkStar system. DXMOS management features such as user accounts, DNS, access lists, RADIUS, , AAA, and IP routes
must be configured for successful connectivity, as detailed in “OSC/Ethernet Management Provisioning” on page 24.
2.3.3 Laser Module Replacement
All laser modules are hot-swappable and can be replaced while the system is running. Follow procedure steps 1 through 9 to
replace wave and OSC laser modules, which are both located under the top access panel. Follow steps 4 through 9 to replace
client laser modules, which are located on the front panel of the chassis.
