Using spanning tree protocol (STP) to enhance layer-2 network topology maps
US8045488B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2008 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | Jan 29, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/0213
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Spanning Tree Protocol (STP) data is obtained via network switch (SNMP) queries to enhance identification of switch-to-switch links in Layer-2 mapping. In particular, by analyzing the STP data, ambiguity in determining switch uplink ports may be reduced. Specifically, the STP data can be used in conjunction with other topography data to provide Layer-2 connectivity for nodes on a network topology. Layer-2 address mapping tables are collected from a topology mapping, and STP data is collected, along with address translation tables (ARP) tables. Using this information, switches are identified using Layer-2 address tables. The STP data can be correlated by comparing data in switches, identifying switch ports directly connected to other switch ports, and eliminating direct switch-to-switch port connections from consideration for further Layer-2 node mappings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.