Express Path (formerly known as services offloading) for ALG traffic

Express Path (formerly known as services offloading) for ALG traffic is supported. Express Path is a mechanism for processing fast-path packets in the Trio chipset instead of in the SPU. This method reduces the long packet-processing latency that arises when packets are forwarded from network processors to SPUs for processing and back to IOCs for transmission. When the IOCs have Express Path enabled and a policy with Express Path configured, Express Path qualification checks are performed right before the session is installed. The following ALG data traffic that supports Express Path-FTP, H.323 (only RTP/RTCP sessions are offloaded), MGCP, MS RPC, RSH, RTSP, SCCP, SIP (only RTP/RTCP sessions are offloaded), SUN RPC, TALK (only TCP sessions are offloaded), and TFTP. DNS, IKE and ESP, PPTP, and SQL-NET ALG data traffic do not support Express Path. Once an Express Path session is setup, packets cannot be sent to the SPU again.