802.3ah OAM
Page 166 7750 SR Interface Configuration Guide
A number of show commands have been enhanced to help operators determine the state of 
the802.3ah OAM Grace function and whether or not the peer is generating or receiving the Grace 
TLV.
The system level information can be viewed using the show system info command.
show system information
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System Information
===============================================================================
System Name            : ystem-name
System Type            : 7750 SR-12
System Version         : 11.0r4
System Contact         :
System Location        :
System Coordinates     :
System Active Slot     : A
System Up Time         : 62 days, 20:29:48.96 (hr:min:sec)
…snip… 
EFM OAM Grace Tx Enable: False
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EFM OAM Grace Tx Enable:
False The system level functionality is not enabled. Grace will not be 
generated on any ports regardless of the state of the option on the 
individual ports
True The system level functionality is enabled and the determination of 
whether to send grace is base on the state of the option configured at the port level
Individual ports also contain information about the current port configuration and whether or not 
the Grace TLV is being sent or received.
Grace Tx Enable has two enable states with the current state in brackets to the right.
False  The port level functionality is not enabled. Grace will not be generated 
on the port regardless of the state of the option at the system level.
True The port level functionality is enabled and the determination of whether 
to send grace is based on the state of the option configured at the system 
level
(inactive) Not currently sending Grace TLV
(active) Currently sending the Grace TLV as part of the Information PDU