核心路由器千兆以太網(wǎng)線卡輸入數(shù)據(jù)的分路設計與實現(xiàn)

千兆以太網(wǎng)線路接口卡是高速路由器中實現(xiàn)與外部鏈路連接的重要模塊，本文介紹了其主要功能，給出一種基于FPGA 和CAM 實現(xiàn)的輸入報文數(shù)據(jù)流分路處理方案和CAM 維護軟件的設計方法。測試結(jié)果表明，該設計方案可以很好地實現(xiàn)對10 端口千兆以太網(wǎng)接口線速處理的支持。
關鍵字：千兆以太網(wǎng)； 線路接口卡； CAM； FPGA
Abstract: GE line card is the key module of the high speed router. After introducing the main
function of GE line card, this paper presents a FPGA-CAM-based approach whith supports
IPv4/IPv6/MPLS input data stream line-speed redirection process. In addition, a board level embedded CAM maintenance software design method also been introduced.Test resulte shows that this application fit the design requirement of 10 ports Gbit ethernet frame line-speed processing.
Keywords: Giga Ethernet; Line card; Content Addressable Memory(CAM);Field Programmable Gate Array (FPGA)