Patent · US Active

System and method for implementing ACLs using standard LPM engine

US7861291B2 · kind B2 · utility

2Cited by

10References

17Claims

0Family size

Assignee

Freeescale Semiconductor, Inc. · US

Inventors

David B. Kramer · Cedar Park, US
Chris Thron · Austin, US
Bernard Karl Gunther · Salisbury, AU

Key dates

Filing date	Jun 2, 2006
Grant date	Dec 28, 2010
Priority date	—
Expiry date	Oct 28, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04L63/101
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method, data processing system, and computer program product are provided for retrieving access rules using a plurality of subtables. An incoming packet that includes fields of data is received from a network. A key is formed from the fields, the key includes a number of subkeys. The subkeys are selected and each of the selected subkeys is used to search a different subtable. If a subtable entry is a pointer, a next level subtable is searched until a failure or data is encountered. If a failure occurs, a default rule is applied. If data is encountered, the key is masked using a stored mask value. The resulting masked key is compared to a stored rule. If they match, the identified rule is applied, otherwise the default rule is applied.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.