Nokia 4A0-105 Question Answer
In IEEE 802.1ag, how are loops detected?
Spanning-tree BPDUs are returned to the sender.
The MEP sees its own CFM frames returned to itself.
This is not a function of IEEE 802.lag but of 802.1D
The record field of the CFM frame keeps track of chassis-mac addresses.
TESTED 10 Feb 2026
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