[En-Nut-Discussion] Help with ZeroWindows

LaVallee, Craig (GE Healthcare) Craig.LaVallee at ge.com
Thu Oct 2 17:19:59 CEST 2008


Does anyone know why I am receiving the ZeroWindows?
 
No.     Time        Source                Destination           Protocol
Info
    526 25503.572509 172.27.1.5            10.119.31.11          TCP
[TCP ZeroWindow] [TCP Keep-Alive ACK] 9100 > 1455 [ACK] Seq=1 Ack=61441
Win=0 Len=0
 
Frame 526 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: DigitalE_00:32:5c (aa:00:04:00:32:5c), Dst:
F5Networ_3c:92:c9 (00:01:d7:3c:92:c9)
Internet Protocol, Src: 172.27.1.5 (172.27.1.5), Dst: 10.119.31.11
(10.119.31.11)
Transmission Control Protocol, Src Port: 9100 (9100), Dst Port: 1455
(1455), Seq: 1, Ack: 61441, Len: 0
    Source port: 9100 (9100)
    Destination port: 1455 (1455)
    Sequence number: 1    (relative sequence number)
    Acknowledgement number: 61441    (relative ack number)
    Header length: 20 bytes
    Flags: 0x0010 (ACK)
    Window size: 0
    Checksum: 0xd07c [validation disabled]
    SEQ/ACK analysis
        TCP Analysis Flags
            This is an ACK to a TCP keep-alive segment
            This is a ZeroWindow segment




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