Date: Fri, 3 Jan 2003 07:17:47 -0500 (EST) From: Nicolas Christin <nicolas@cs.virginia.edu> To: freebsd-net@FreeBSD.ORG Subject: Re: Quad ethernet question Message-ID: <Pine.GSO.4.44.0301030712460.1242-100000@arachnion.cs.Virginia.EDU> In-Reply-To: <Pine.GSO.4.44.0301030652250.1188-100000@arachnion.cs.Virginia.EDU>
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On Fri, 3 Jan 2003, Nicolas Christin wrote:
> If there is interest I can try to dig up the old email in which I was
> describing the problem...
Following is a more accurate description of the problem I saw with the
card mentioned in this thread. I don't seem to have a printout of the
available mbuf's at hand, but I distinctly remember that everything
looked fine on that front.
--Nicolas
I am experiencing some problems with the sf driver, which I use on the
following quad card:
Adaptec ANA-62044 SGLQuartet 64 10/100Base TX
The driver works just fine most of the time, I can transmit/receive data
on all four ports. However, when the link governed by the sf driver gets
overloaded, I sometimes get the following error:
nc2y@tin </home/nc2y>$ ping 10.0.4.2
PING 10.0.4.2 (10.0.4.2): 56 data bytes
ping: sendto: No buffer space available
where sf0 is configured as follows:
nc2y@tin </home/nc2y>$ ifconfig sf0
sf0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 10.0.4.1 netmask 0xffffff00 broadcast 10.0.4.255
inet6 fe80::200:d1ff:feee:3ff1%sf0 prefixlen 64 scopeid 0x3
ether 00:00:d1:ee:3f:f1
media: 100baseTX <full-duplex> status: active
supported media: autoselect 100baseTX <full-duplex> 100baseTX
10baseT/UTP <full-duplex> 10baseT/UTP none
Interestingly enough, when pinging 10.0.4.1 from 10.0.4.2, I do not get
any error, and ICMP replies actually manage to make it.
This experiment was run on an Intel Pentium III running FreeBSD 4.3. (I
don't think there are any changes to the sf driver in FreeBSD 4.4.)
[Note: the same problem is present in 4.5.]
--
Nicolas Christin
Ph.D. Candidate, University of Virginia, Computer Science
http://www.cs.virginia.edu/~nicolas
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