ASIC 칩으로 개발된 네트워크 프로세서의 경우 패킷에 대한 처리는 제한적이다. 즉 L4 패킷 처리가 가능한 네트워크 프로세서에서 L7 패킷에 대한 처리는 불가능 하다. L7 패킷 처리를 위해서는 네트워크 프로세서에 대한 변경이 필요하다. 그러나 네트워크 프로세서의 변경이 아닌 범용 프로세서와의 연동을 통해 L7 패킷을 처리 할 수 있다. 네트워크 프로세서에서는 연동 블록을 통해 L7 패킷을 범용 프로세서로 전송하며 범용 프로세서에서는 전송된 L7 패킷을 처리한다. 이러한 연동을 통해 네트워크 프로세서의 다계층 패킷 처리가 가능해진다. 이때 범용 프로세서의 패킷 전송을 위한 인터페이스는 표준 버스인 PCI Express를 사용한다. 본 논문에서는 L7 패킷 처리를 위한 네트워크 프로세서와 PCI Express간의 연동블록을 제안한다.
KSP Keywords
PCI-Express(PCIe)
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