Avaya Simple Loop Prevention Protocol

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Simple Loop Prevention Protocol in computer networking is a layer 2 protocol invented by Nortel to protect against network loops. SLPP uses a small hello packet to detect a network loops. The SLPP protocol checks packets from the originating switch and the peer switch in a SMLT configuration. Sending hello packets on a per VLAN basis allows SLPP to detect VLAN based network loops for un-tagged as well as tagged IEEE 802.1Q VLAN link configurations. Once a loop is detected, the port is shutdown.