Junos® OS Ethernet Interfaces Configuration ... - Juniper Networks

Understanding WAN Framing for 10-Gigabit Ethernet Trio Interfaces
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If you use the wan-phy statement option at the [edit interfaces xe-fpc/pic/0 framing]
hierarchy level to configure Trio WAN mode framing for 10-Gigabit Ethernet interfaces,
then the alarm behavior of the link, although in full compliance with the IEEE 802.3ae
10-Gigabit Ethernet standard, might not be as expected.
In particular:
Copyright © 2012, Juniper Networks, Inc.
• The interface does not distinguish between loss of light (LOL), loss of phase lock loop
(PLL), or loss of signal (LOS). If a loss of PLL or LOS alarm occurs, then both PLL and
LOS alarms are raised. LOL is also raised because there is no separate LOL indication
from the hardware.
• The interface does not raise LOS, PLL, or LOL alarms when the fiber in disconnected
from the interface port. You must remove the hardware to raise this alarm.
• The interface line-level alarm indicator signal (AIS-L) is not always raised in response
to a loss of framing (LOF) defect alarm.
• If the AIS-L or path-level AIS (AIS-P) occurs, the interface path-level loss of code
delineation (LCD-P) is not detected. LCD-P is seen during the path-level remote defect
indicator (RDI-P) alarm.
• If an AIS-L alarm occurs, the AIS-P is not detected, but the LOP alarm is detected.
None of the alarm issues are misleading, but they make troubleshooting the root cause
of problems more complex.
• framing on page 483
• Configuring 10-Gigabit Ethernet Framing on page 356
• 10-Gigabit Ethernet Framing Overview on page 355
• Junos® OS Ethernet Interfaces
Chapter 24: Configuring 10-Gigabit Ethernet Framing
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