2000-A2-GB20-10
- 191 -
February 2004
- bad checksums
Checksum value in TCP header is incorrect.
- with headers too small
Size of the TCP header is less than 20 bytes.
- packets smaller than
header
Packet size is less than the TCP header size.
- packets larger than frame Packet is larger than the internal packet buffer.
- acks for unsent data
Unacceptable/invalid/unsent acknowledge number
in the TCP header.
- with data outside window The remote host has sent data beyond the window
that the software could advertise.
- with data after close
TCP packets received in a Closed state/connection.
segments with data
Total segments received, including those received
in error. This count includes segments received on
currently established connections.
segments with duplicate
data
No. of segments received with duplicate data.
segments with only an
ACK
Not used
segments with a duplicate
ACK
Not used
segments with a RST
No. of segments received with the RST (Reset)
Flag bit on in the TCP header.
window probes
Not used
window updates
Not used
Sent Packet Information
packets sent
Total TCP packets sent.
discarded for lack of
resources
Discarded transmitted packets due to lack of
resources: kernel memory or packet buffers.
discarded due to internal
errors
Discarded transmitted packets due to internal
software errors.
with illegal destination port Destination port field value in TCP header is illegal.
segments with data
Total segments sent.
segments with
retransmitted data
No. of retransmitted TCP data packet.
segments with only an
ACK
Not used
segments with a delayed
ACK
Not used
segments with a RST
No. of unsolicited reset (RST) segment sent.
window probes
Not used
window updates
Not used
active opens
No. of TCP connections opened.
passive opens
No. of TCP passive connections opened.
connections currently
established
No. of TCP connections currently established.
Table 12–6. TCP Statistics Report
Parameter
Description
