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Configuring OTN Optics

PTX Series routers support Optical Transport Network (OTN) interfaces, including the 100-Gigabit Ethernet DWDM OTN PIC.

1. Configure the interface wavelength. See Configuring the 10-Gigabit or 100-Gigabit Ethernet DWDM Interface Wavelength.
2. Enable the laser:
   [edit interfaces et-0/0/0 otn-options]user@host# set laser-enable
3. (Optional) Set the trace identifiers:
   [edit interfaces et-0/0/0 otn-options]user@host# set tti tti-identifier tti-identifier-name
4. (Optional) Set the triggers:
   [edit interfaces et-0/0/0 otn-options]user@host# set trigger trigger-identifier
5. (Optional) Enable VLAN tagging. See Enabling VLAN Tagging.
6. (Optional) Set the media MTU. See Configuring the Media MTU.
7. (Optional) Set the unit VLAN ID, family inet, and IP address:
   [edit interfaces et-0/0/0 ]user@host# set vlan-id numberuser@host# set family inetuser@host# set address address

8. (Optional) Configure pre-forward error correction (pre-FEC)-based fast reroute (FRR) to enable monitoring of the pre-FEC status of the OTN link:

   1. Set the BER signal-degrade threshold:
      [edit interfaces et-0/0/0 otn-options signal-degrade]user@host# set ber-threshold-signal-degrade value
   2. Set the BER threshold to clear signal-degrade alarms:
      [edit interfaces et-0/0/0 otn-options signal-degrade]user@host# set ber-threshold-clear value
   3. Set the time interval for signal-degrade collection. After the BER threshold for signal-degrade is crossed for ten consecutive intervals, an alarm is raised. If the BER threshold for signal-degrade clear is crossed for ten consecutive intervals, the alarm is cleared.
      [edit interfaces et-0/0/0 otn-options signal-degrade]user@host# set interval value

      Note: Configuring a high BER threshold for signal-degrade and a long interval might cause the internal counter register to be saturated. An invalid configuration will be discarded by the PIC driver, and the default values will be used instead. A system log message will be logged for this error.

   4. Enable signal degrade monitoring:
      [edit interfaces et-0/0/0 otn-options preemptive-fast-reroute]user@host# set signal-degrade-monitor-enable
9. (Optional) Enable backward FRR to insert the local pre-FEC status into transmitted OTN frames and monitor received OTN frames for the pre-FEC status:
   [edit interfaces et-0/0/0 otn-options preemptive-fast-reroute]user@host# set backward-frr-enable