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I looked up what EGM refered to.
It stands for 'Enhanced group management'.
Its refered to in the CMCNE 'Connectrix Manager Converged Network Edition' user guides.
CMCNE is software that is usued to manage Brocade switches in an enviorment.
Links to some of the guides or as follow's:-
-> There is a section in these guides on 'Enhanced Group Management'.
Hopefully this helps.