I would suggest check CRC and duplex mismatch twice :) if everything goes fine then you better play with the following TCP tweaks..
flow no-tcp-seq-check flow tcp-syn-check flow tcp-syn-bit-check Regards, Masood -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Leslie Sent: Wednesday, February 11, 2009 1:44 AM To: [email protected] Subject: Re: [j-nsp] transfer between 2 ns2000's is slow I got some good advice that my limits are suspiciously close to some tcp limits -- I have tried some tuning in my kernel but I am going to try hacking around a bit more and see if it helps with anything as well. Leslie wrote: > I'm having a strange problem that I haven't been able to fix after much > studying -- > > Basically my setup is host 1 - fw1 - dedicated 1gige link (~25ms lag) - > router2 - fw2 - host 2 > > I can blast udp across this pipe without a problem, but tcp traffic ch > seems to be limited to about 3 mbyte/s -- I can make multiple sessions > that are all transferring at this speed, but no individual session will > go over that "limit" > > Another thing that makes me extremely suspicious is occasionally when I > start a transfer I'll see a brief cpu spike -- like shown below > > get perf cpu detail > Average System Utilization: 21% > Last 60 seconds: > 59: 37 58: 34 57: 38 56: 27 55: 39 54: 38 > 53: 81** 52: 76** 51: 81** 50: 77** 49: 82** 48: 62* > 47: 36 46: 37 45: 35 44: 36 43: 36 42: 35 > 41: 32 40: 37 39: 33 38: 37 37: 34 36: 39 > 35: 33 34: 38 33: 33 32: 39 31: 33 30: 39 > 29: 31 28: 40 27: 29 26: 42 25: 35 24: 41 > 23: 35 22: 38 21: 31 20: 35 19: 32 18: 41 > 17: 35 16: 38 15: 34 14: 39 13: 35 12: 40 > 11: 33 10: 40 9: 32 8: 39 7: 45 6: 39 > 5: 34 4: 40 3: 35 2: 42 1: 36 0: 39 > > > I've obviously spent hours and hours on the phone/email with tac without > much help. Does anyone have any ideas of what could be doing this? Any > troubleshooting tips? > > Thank you > > Leslie > _______________________________________________ > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
