802.1ag and Y.1731

Unanswered Question
Apr 27th, 2008

Hi All,

802.1ag defines and classifies MEP as 'Down MEP' and 'Up MEP' where as Y.1731 doesn't classify MEPs. How will be the implementation when a device supports both 802.1ag and Y.1731 standards? Can we assume the MEP in Y.1731 implementation always to be a 'Down MEP'?

Why have two different standard bodies defined separate standards for the same functionality ( CC, LT and LB)?


-Sriram K

I have this problem too.
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aghaznavi Mon, 05/05/2008 - 06:15

mep-up -- Generates a trap when a new remote maintenance end point (MEP) has been discovered and learned by the device or when a change occurs in the port state of a previously discovered remote MEP.

mep-down -- Generates a trap when a device has lost connectivity with a remote MEP or when connectivity from a previously learned remote MEP is restored after interruption.

ksriram29 Mon, 05/05/2008 - 07:31

Thanks for your reply. I think I wasn't clear enough. By the terms "Up MEP" and "Down MEP", I meant the direction of the MEP and not the state. In cisco's terms Up MEP = Inward facing MEP(MAC Relay entity side transmission) and Down MEP = Outward facing MEP(wire side transmission).


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