HP StorageWorks 1606 Brocade Fabric OS Command Reference v6.3.0 (53-1001337-01 - Page 742

2 portShow In Fabric OS v6.2.0 and later, each GbE port is associated with a TCP history, which tracks the state of statistics at the moment of a TCP connection failure. An entry is logged for the TCP connection when it encounters any of the following failures: • Maximum number of retransmits is exceeded (MAX RTX) • Maximum keep alive timeout is exceeded (KEEPALV TO) • RST packet is received (RESET RCVD) You can display the TCP history with the fciptunnel -hist command. This command displays a maximum of 16 entries. Once the maximum history length is reached, the oldest entry is removed from the end, and the newest entry is added to the front of the TCP history as future connection failures occur. The following data items are captured when a TCP connection encounters a failure: Reason The reason for the TCP connection failure RTT Round trip time RTT H Round trip time high water mark Var Variance Var H Variance high water mark OOO Counter of out-of-order segments OOO H Out-of-order segments high water mark Sendw Cwnd Size of sender congestion window (bytes) Rx win Size of receive window (bytes) Fast Rtx Fast retransmits F Rtx H Fast retransmits high water mark Slow Rtx Slow retransmits InFlt H Packets in-flight high water mark SlowStarts Counter of slow starts Rtx TO Retransmit timeouts Rtx Rtx TO Counter of retransmit packets due to timeout Dup ACK Counter of duplicate ACKs Rtx Dup ACK Counter of retransmit packets due to duplicate ACK LPort Local port RPort Remote port Along with history, the system keeps track of the following TCIP statistics, which you can display with the fciptunnel -snapshow option. The statistic is collected from system startup onwards until it is reset with the fciptunnel -snapstart option. Subsequent calls to -snapshow display statistics collected since the system was last reset. The TCIP statistics include the following information: Tunnel Num The tunnel number associated with this TCP connection Connection The type of TCP connection (CONTROL or DATA) LPort Local port RPort Remote port 712 Fabric OS Command Reference 53-1001337-01