Abstract:

Abstract— For packet classification in software-defined networking (SDN) and OpenFlow applications, ternary content-addressable memory (TCAM) on field-programmable gate arrays (FPGAs) based on static random access memory (SRAM) is utilized. The majority of a TCAM design on FPGAs is made up of SRAMs that implement TCAM contents, which are susceptible to soft mistakes. It is difficult to safeguard SRAM-based TCAMs from soft errors while preserving high search performance and critical path delay. A low-cost, low-response-time method for protecting SRAM-based TCAMs is presented in this brief. This method has a low critical path overhead and detects faults using straightforward, single-bit parity. This method uses the binary-encoded TCAM table that is kept up to date in SRAM-based TCAMs to construct an inexpensive, low-response-time error-correction system. The process of error-correction is carried out in the background, enabling concurrent lookup operations and preserving a high search speed. On a 1024 × 40 size TCAM on Artix-7 FPGA, the suggested method maintains a search pace of 222 million searches per second while offering protection against soft mistakes with a reaction time of 293 ns.

Description:

.