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Impossible to delete EFT from the system

Publication Date:  2012-07-24 Views:  68 Downloads:  0
Issue Description

Customer wished to remove EFT Ethernet board from Metro 1000. After they cleared all trails, it could not be deleted from its slot anyway. There was a responce,
that the board is in protection group.

Alarm Information
No alarm information.

Handling Process
After we checked the logical systems, existed on this Metro 1000, we found, that two logical systems are created automatically, though there are STM-4 level optical board is placed there. Each such system has one VC4 bound to it.
After deleted this logical systems, the equipment allowed to delete the board from its slot.


Root Cause

EFT is a new kind of Ethernet boards comparing to ET1D for example and has some specific features. As there some protection group is mentioned, that means
 it is necessary to check in logical systems, whether some not-man made protection is created.