Simple Loop Prevention Protocol
Nortel Simple Loop Prevention Protocol (SLPP) in computer networking is a [Data link layer|layer 2] protocol inventeted 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.
Compatible Equipment
- ERS-8600 - Software version 4.1 or above Cite error: A
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Commands
Commands on two core ERS-8600 switches in a switch cluster.
- ERS 8600 Core Switch A===
- ERS-8610:5# config slpp add 200
- ERS-8610:5# config slpp operation enable
- ERS-8610:5# config ethernet 2/1-2/30 slpp packet-rx enable
- ERS-8610:5# config ethernet 2/1-2/30 slpp packet-rx-threshold 10
- ERS 8600 Core Switch B
- ERS-8610:5# config slpp add 200
- ERS-8610:5# config slpp operation enable
- ERS-8610:5# config ethernet 4/1-4/30 slpp packet-rx enable
- ERS-8610:5# config ethernet 4/1-4/30 slpp packet-rx-threshold 50
References