A loss of alignment has occurred in the virtual concatenation (mapping of a 1GbE signal
from a 11STMM10 client port into 24 STS-1s for 11STMM10 network port
transmission).
The VCGLOA alarm is masked by any higher level SONET section or line alarms, so if
this alarm is present it means that the 11STMM10 is receiving a valid, error-free OC-48
network signal.
Severity Critical
Service affecting? Yes
Applicability 11STMM10
Corrective Action
NOTICE
Service-disruption hazard
A cold reset, reseat, or replacement of a card is service impacting if the card is currently
carrying services. To determine if any services are currently carried over a card, perform
the procedure “Reseating a Card” (p. 3-19).
If
there are services currently carried over the card, it may be best to wait for a
maintenance window before resetting, replacing, or reseating the card.
At the end of each step wait to see if the fault clears. If not, continue with the next step.
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1
Verify the end-to-end path of the 11STMM10 circuit to ensure that the card reporting the
alarm is connected to a 11STMM10 on the far end. A possible cause of this alarm is if the
card is connected to another valid OC-48 signal generated by a test set or SONET
interface, but which does not include two GFP encapsulated 1GbE signals. Perform a
warm card reset of the 11STMM10 reporting the alarm.
CLI config card card type shelf slot reset warm
WEBUI Select the card, click the Reboot tab, select Warm Reboot >Submit.
...................................................................................................................................................................................................
2
Perform a warm reset of the card of the far end 11STMM10 that is connected to the
11STMM10 reporting the alarm.
CLI config card card type shelf slot reset warm
Trouble-clearing procedures
VCGLOA
VCGLOA (Loss of alignment)
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1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011
2-347
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