99
User Guide
If LLR is disabled and the fiber port’s receiver loses link, the port’s trans-
mitter behavior will depend on the auto-negotiation setting. If auto-negoti-
ation is enabled, the transmitter will shut down. If auto-negotiation is
disabled, the transmitter will continue to stay up. The following table
describes the transmitter’s response when the port stops detecting link,
based on the LLR and auto-negotiation settings.
Table 6: Transmitter Behavior When Port Loses Link
LLR
Auto-Negotiation Fiber Transmitter
Disabled
Enabled
Off
Disabled
Disabled
On
PC
Switch/Hub
w/SNMP
Customer
Site
Link Loss Returned
LED lit = established link
LED unlit = no link
Broken
Fiber
Conductor
LLR2 is OFF
AN is ON
Services
Line Card
PC
Switch/Hub
w/SNMP
Customer
Site
LED lit = established link
LED unlit = no link
Broken
Fiber
Conductor
LLR2 is OFF
AN is OFF
Services
Line Card
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