[LS-1057] Reservation Failed:No free V/D pairs available for MSAN-------------Prod Created: 07/Apr/26  Updated: 14/Apr/26  Due: 09/Apr/26  Resolved: 08/Apr/26

Status: Implementation in progress
Project: L3 Support
Component/s: FN
Affects Version/s: None
Fix Version/s: None

Type: Bug Priority: Normal
Reporter: Abir Messaikeh Assignee: Ayed Bada
Resolution: Not Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Attachments: Text File NepServerLog.txt    
Customer:
OMAN-Tel
Planned Start:
Planned End:
Product: NEP
Rejected By: Ayed Bada

 Description   

While reserving the trail for subscriber :: 26836186 getting below error. Although pair is available.
Please check and support.

@Mohan Singh Rathor please share latest FN logs of prod server.

 Comments   
Comment by Abir Messaikeh [ 07/Apr/26 ]

nep logs:https://mobinets-my.sharepoint.com/:f:/p/mohan_rathor/IgAtvDQbCnqDRbvwGtPR0G4SAUHrPUGvtLewKARxX_g2cCg?e=9DAKJv
fn logs:
https://mobinets-my.sharepoint.com/:f:/p/mohan_rathor/IgCZ2nvzP-9rQq4OYHcJDM6HATDsCiYE157mpchfjOSuuKw?e=gnMrR8

Comment by Ayed Bada [ 07/Apr/26 ]

After reviewing the logs for the concerned use case on the NEP server, I found that the NEP backend attempts to reserve a trail for one of the following: MSANOY03_01_PVMD or OY03_01_IPMD_MAIN.
The issue causing the exception is as follows:
MSANOY03_01_PVMD has no OSP connection for data, although it does have one for voice.
OY03_01_IPMD_MAIN has OSP connections for data, but none for voice.
This mismatch is what triggers the exception.
For more details, please refer to the logs.

Comment by Ayed Bada [ 08/Apr/26 ]

I have added log messages in the FN code to check the processed data during the reservation of the copper trail.
patch 3.7.0.1443.
Best regards,
Ayed

Comment by Abir Messaikeh [ 14/Apr/26 ]

Applied on Staging - to share same scenarios from staging to provide us the way of resolution

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