Simple Loop Prevention Protocol (SLPP) Guard Feature

Simple Loop Prevention Protocol (SLPP) is an application that detects loops in an MLAG or Split Multi-link Trunking (SMLT) network on VOSS/BOSS switches. SLPP Guard is a new complementary feature for ExtremeXOS switches that helps prevent loops in networks by administratively disabling an edge port if a switch receives an SLPP PDU from an SMLT network.

SLPP Guard detects and discards SLPP control PDUs on a per port basis. SLPP Guard identifies SLPP PDUs using the Ethernet type field of the packet, which is configurable. When an SLPP PDU is received on a port that has SLPP Guard activated on it, it is immediately disabled. After a configurable timeout value expires (associated with each port), the port is automatically re-enabled.