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I have some nodes (An) connected to switch A and others (Bm) connected to switch B.
Should Bm nodes receive LLDP packets from switch A?
802.1AB defines several (3) multicast addresses for LLDP that a compliant switch should not forward.
That said, an unmanaged switch with no specific handling for multicast will very likely treat LLDP (and any multicast traffic) as broadcast and spam it to every port.
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