nettl tracing

[Tuan Nguyen]

Hello experts,

I am running nettladm on my N4000 server (HPUX-11.11) this trace file show the client connection to my server port 1530. However, I do not know what "< 564=""> " means. Please anyone help explain this to me. Thank you very much for your help.

Ei 192.168.8.201.1650 > 172.31.18.10.1530: [DF] S 794ed180:794ed181(0) ack: 9966be95 win: ffff < 564="">

Ei 172.31.18.10.1530 > 192.168.8.201.1650: [DF] SA 438d01d4:438d01d5(0) ack: 794ed181 win: 8000 < 564="">

Tuan N

[Ivan Krastev · Accepted solution]

Hello Tuan,


mss should be TCP MSS - Maximum Segment Size

regards,
ivan

[Ivan Krastev]

See also this ndd tunables:

tcp_mss_def, tcp_mss_min and tcp_mss_max.

regards,
ivan

[Tuan Nguyen]

Ivan,

Thank you very much for your supper fast response. What about the "unknown opt: 4". The reason I am asking is because this 1530 port does not respond as fast as it supposed to be. The client that connect to the oracle database using this port has slower response than clients that connect to the same database but using different port.

Tuan N.