iSR6200 Intelligent Storage Router Installation Guide - QLogic

5–Fibre Channel over IPConfiguring FCIP• TCP Retransmit Timer Expired—The sender of a packet did not receive anACK for a packet within the retransmit time-out window. The sender willretransmit the packet. This is typically the result of the ACK being droppedsomewhere in the WAN due to congestion or corruption of the ACK (lesslikely).The following example shows the FCIP link statistics from the router’s CLI showstatistics command. The TCP Timer Expired value consists of twocounters:• The upper 16 bits is a count of the number of retransmits resulting fromreceiving duplicate ACKs (count = 34 in the example).• The lower 16 bits is a count of the number of retransmits resulting fromretransmit time outs (count = 10 in the example).FCIP Link Statistics-----------------------FCIP Link 1FC Xmit Frames 647245FC Xmit Bytes 1290829908FC Rcvd Frames 664413FC Rcvd Bytes 1276994796IP Xmit Packets 3747952IP Xmit Byte Count 2849890416IP Xmit Fragments 0IP Rcvd Packets 3649896IP Rcvd Byte Count 2856931542IP Rcvd Fragments 0IP Datagram Reassembly Count 0IP V6Pkt Rcvd 34IP Error Packets 0IP Reassembly Errors 0TCP Xmit Segment Count 3747952TCP Xmit Byte Count 2729955868TCP Xmit Acks 52598TCP Rcvd Segment Count 3649888TCP Rcvd Byte Count 2740134348TCP Rcvd Acks 37708TCP Rcvd Window Probes 0TCP Timer Expired 340010TCP ECC Error Corrections 0MAC Xmit Frames 1890446ISR651101-00 G 5-11