From owner-freebsd-current  Sat Feb  6 19:15:39 1999
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id TAA25710
          for freebsd-current-outgoing; Sat, 6 Feb 1999 19:15:39 -0800 (PST)
          (envelope-from owner-freebsd-current@FreeBSD.ORG)
Received: from freya.circle.net (freya.circle.net [209.95.95.2])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id TAA25603
          for <freebsd-current@freebsd.org>; Sat, 6 Feb 1999 19:14:08 -0800 (PST)
          (envelope-from tcobb@staff.circle.net)
From: tcobb@staff.circle.net
Received: by freya.circle.net with Internet Mail Service (5.5.2232.9)
	id <1H4AT203>; Sat, 6 Feb 1999 22:13:08 -0500
Message-ID: <A0CFA284C004D211B7EE0060082F32A412E120@freya.circle.net>
To: freebsd-current@FreeBSD.ORG
Cc: wpaul@ctr.columbia.edu
Subject: 3c905B stops responding during ifconfig alias
Date: Sat, 6 Feb 1999 22:13:06 -0500 
MIME-Version: 1.0
X-Mailer: Internet Mail Service (5.5.2232.9)
Content-Type: text/plain;
	charset="iso-8859-1"
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

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

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message