Subject: kern/10631: lo0 aliases don't work anymore
To: None <>
From: Michael Graff <>
List: netbsd-bugs
Date: 07/18/2000 18:29:18
>Number:         10631
>Category:       kern
>Synopsis:       lo0 aliases don't work anymore
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jul 18 18:30:00 PDT 2000
>Originator:     Michael Graff
>Release:        1.4ZD through 1.5_ALPHA
System: NetBSD 1.4ZD NetBSD 1.4ZD (POOFBALL) #0: Tue Jun 13 17:29:37 PDT 2000 i386

In 1.4.x, adding a lo0 alias using
	ifconfig lo0 netmask 0xffffffff alias
would add another address to a machine, using the loopback interface.
From the outside, this alias is pingable from fxp0, which has address

Now, in 1.4ZD through 1.5_ALPHA (perhaps earlier) the machine will not
respond to ARP requests for lo0 aliases.
Add an alias to lo0 and watch it not work.