Date: Sat, 6 Feb 1999 22:13:06 -0500 From: tcobb@staff.circle.net To: freebsd-current@FreeBSD.ORG Cc: wpaul@ctr.columbia.edu Subject: 3c905B stops responding during ifconfig alias Message-ID: <A0CFA284C004D211B7EE0060082F32A412E120@freya.circle.net>
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This happens in -current and -stable.
Machine:
CPU: Pentium II (quarter-micron) (350.80-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x652 Stepping=2
Features=0x183fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,
CM
OV,PAT,PSE36,MMX,<b24>>
real memory = 402653184 (393216K bytes)
config> quit
avail memory = 388808704 (379696K bytes
...
xl0: <3Com 3c905B Fast Etherlink XL 10/100BaseTX> rev 0x30 int a irq 9 on
pci0.18.0
...
During an ifconfig xl0 alias, the xl0 interface drops packets.
It does NOT generate errors (netstat -in).
In fact, on several occasions I've seen it go completely
unresponsive (not responding to arp requests) until kicked back
to life by outbound packets.
This does NOT happen on the:
xl0: <3Com 3c905 Fast Etherlink XL 10/100BaseTX> rev 0x00 int a irq 10 on
pci0.1
8.0
Here's a quick test program that I use:
#!/usr/bin/perl
# call this as just_alias.pl class_c num_ips
$ip_base=$ARGV[0] || "209.95.67.";
$num=$ARGV[1] || 250;
for (1..$num)
{
print "aliasing for $ip_base".$_."\n";
system ("ifconfig xl0 alias $ip_base".$_." netmask
255.255.255.255");
# the sleep command allows us to see the problem more
# clearly, though it does happen w/o the sleep here...
sleep 1;
}
-Troy Cobb
Circle Net, Inc.
http://www.circle.net
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