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 shutdown.
Compatible equipment
- VSP-9000 - Software version 3.0 or above
- VSP 7000 - Software version 10.0 or above
- ERS-8600 - Software version 4.1 or above[1]
- ERS-8300 - Software version 4.0 or above
- ERS-5000 - Software version 6.3 or above
- ERS-4000 - Software version 5.6.2 or above
- ERS-3500 - Software version 5.2.0 or above
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
See also
References
Further reading
- "United States Patent 20070230357". United States Patent and Trademark Office. October 4, 2007. Retrieved 3 Sep 2011.
{{cite journal}}: Cite journal requires|journal=(help); Unknown parameter|authors=ignored (help) - Simple Loop Prevention Protocol Google Patents
- Simple Loop Prevention Protocol (SLPP)
- Nortel "Simple Loop Prevention Protocol" (SLPP)
- Switch Clustering Design Best Practices
- Quick Nortel MLT (Link Aggregation) Reference
- Switch Clustering Design Best Practices
External links
Look up SLPP in Wiktionary, the free dictionary.
