Date: Sat, 26 Oct 1996 08:39:49 +0500 From: A JOSEPH KOSHY <koshy@india.hp.com> To: davidn@sdev.usn.blaze.net.au (David Nugent) Cc: freebsd-current@freebsd.org Subject: Re: High packet loss for the `ed' driver? Message-ID: <199610260339.AA142131189@fakir.india.hp.com> In-Reply-To: Your message of "Sat, 26 Oct 1996 07:37:36 %2B1000." <199610252137.HAA28246@sdev.usn.blaze.net.au>
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>>>> "dn" == "David Nugent" <davidn@sdev.usn.blaze.net.au> writes dn> davidn@sdev[~]# ping -f unique dn> PING unique.usn.blaze.net.au (203.17.53.17): 56 data bytes dn> Same driver, using 8-bit WD8003EBT's on both systems over coax. Following negative reports from a couple of people I looked at what I was doing again. The problem doesn't crop up if the network load is low. In other words, 1. `ping -f' has no problems if run from one machine. 2. If there are two or more ping floods going on, the symptoms appear rapidly in the case of the `ed' driver. The problem seems to be related to the network load since the symptoms are seen even when two unrelated machines are ping flooding each other. E.g:- -------- Machine Test1, P5-100, PCI DEC21040 card using de0. Machine Krill, P5-90, ISA HP PC Lan+ using ed0. (On the first machine `Test1' with the DEC card) test1# ping -f megha PING megha.india.hp.com (IP ADDR) : 56 data bytes .......................................................................... (no problems seen on this machine) (While the first ping flood is in progress, start one more ping -f on the machine with the `ed' driver and HP PC Lan+ card) krill# ping -f cyborg PING cyborg.india.hp.com (IP ADDR) : 56 data bytes ...................................ping: sendto: No buffer space available ping: wrote cyborg.india.hp.com 64 chars, ret=-1 ping: sendto: No buffer space available ping: wrote cyborg.india.hp.com 64 chars, ret=-1 ..............ping: sendto: No buffer space available -------- Thats strange. Koshy
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