A-75
Cisco ONS 15530 Configuration Guide and Command Reference
78-14227-01, Cisco IOS Release 12.1(10)E2
AppendixA Command Reference
Interface Configuration Commands
laser control forward enable
To enable forward laser control, which automatically shuts down line card lasers when a loss of light
failure occurs, use the lasercontrol forward enable command. To disable this feature, use the no form
of this command.
laser control forward enable
no laser control forward
Syntax Description This command has no other arguments or keywords.
Defaults Enabled on esconphy interfaces
Disabled on all other interfaces
Command Modes Interface configuration
Command History
Usage Guidelines Use this command to enable forward laser control on both the interfaces of a line card and on the OSC
wave interfaces. If configured on a transparent interface, the client side laser of a transponder line card
shuts down when the trunk side receiver detects a loss of light. If configured on the wave interface, the
trunk side laser of the transponder line card shuts down when the client side receiver detects a loss of
light.
Note To function correctly, configure forward laser control on both interfaces on a line card. For y-cable
protection, configure forward laser control on both the transparent and wave interfaces on both
transponder line cards.
Automatically shutting down the laser prevents the transmission of unreliable data. However, when the
laser is shut down, fault isolation is more difficult.
This feature is convenient for configurations, such as Sysplex, where signal protection is performed in
the client hardware and quick laser shutdown causes quick path switchover.
Caution Do not configure forward laser control when OFC is enabled. Combining these features interferes
with the OFC protocol.
Release Modification
12.1(10)EV2 This command was introduced.