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Re: I connect to the server slowly by telnet in other subnet.

 
Wangbin_1
Occasional Contributor

I connect to the server slowly by telnet in other subnet.

I captured the telnet procedure in both server and client. I looked into the procedure. I found It took 18 seconds in application server between third ip packet sent by the client and fourth ip packet sent by the servers. the tcp sequence and acknowledgment number of fourth ip packet were different with ones of third ip packet. the details are following:

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ARPA/9000 NETWORKING^^^^^^^^^^^^^^^^^^^^^^^^^^@#%
Timestamp : Wed Jan 29 EAT 2003 10:08:13.117980
================================ IP Header (inbound -- [ICS]) ================
Source: 10.77.78.172(A) Dest: omc2app1 (A)
len: 52 ttl: 62 proto: 6 cksum: 0xbb0b id: 0xce45
flags: DF tos: 0x0 hdrlen: 20 offset: 0x0 optlen: 0
-------------------------------- TCP Header ----------------------------------
sport: 2623 --> dport: telnet flags: ACK
seq: 0x715b9785 urp: 0x0 chksum: 0x7dfd data len: 0
ack: 0x8a72e696 win: 0xb5c9 optlen: 12
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ TCP Options ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0: 01 01 08 0a 00 23 b6 62 02 eb 51 d2 -- -- -- -- .....#.b..Q.....

vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvARPA/9000 NETWORKINGvvvvvvvvvvvvvvvvvvvvvvvvvv@#%
Timestamp : Wed Jan 29 EAT 2003 10:08:31.613072
================================ IP Header (outbound -- pid: 11232) ==========
Source: omc2app1 (A) Dest: 10.77.78.172(A)
len: 55 ttl: 64 proto: 6 cksum: 0xd2b2 id: 0xb49b
flags: DF tos: 0x0 hdrlen: 20 offset: 0x0 optlen: 0
-------------------------------- TCP Header ----------------------------------
sport: telnet --> dport: 2622 flags: PUSH ACK
seq: 0x8a009369 urp: 0x0 chksum: 0xf2f4 data len: 3
ack: 0x7083b812 win: 0x0 optlen: 12
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ TCP Options ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0: 01 01 08 0a 02 eb 59 0c 00 00 00 00 -- -- -- -- ......Y.........
-------------------------------- TELNET --------------------------------------
0: ff fd 24 -- -- -- -- -- -- -- -- -- -- -- -- -- ..$.............

I think there are maybe something wrong with the network card of the application server. who can tell me why ?

1 REPLY 1
Robert-Jan Goossens
Honored Contributor

Re: I connect to the server slowly by telnet in other subnet.

Hi,

If you help me on what OS you are,(HPUX?) (;^'

Robert-Jan.