Avaya Simple Loop Prevention Protocol

Simple Loop Prevention Protocol (SLPP) in computer networking is a layer 2 protocol invented by Nortel (now acquired by Avaya) to protect against network loops. SLPP uses a small hello packet to detect 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 shut down.

Compatible equipment

Commands

Commands on two core ERS-8600 switches in a switch cluster.

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-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

See also

References

  1. ↑ Nortel Enterprise Converged Networking

Further reading

External links

Look up SLPP in Wiktionary, the free dictionary.
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