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From: chris@aladdin.net
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Problem with ifconfig alias
Date: 4 Aug 1995 20:02:43 GMT
Organization: Aladdin Internet
Lines: 66
Distribution: world
Message-ID: <3vtud3$inv@alpha.aladdin.co.uk>
NNTP-Posting-Host: me.aladdin.co.uk
X-Newsreader: <WinQVT/Net v3.9>
Can anyone help explain what is happening in the example below.
I need multiple IP addresses on the same interface in order to
run multiple www servers. This works fine under Linux but something
odd is happening under FreeBSD which I would like to switch to.
The system is a clean install of 2.05R, I recompiled the kernel to
only use the appropriate devices but havnt changed anything other than
the config file.
Other than this problem everything seems to be working very well !!.
Network card is an NE1000 486 DX 16MB ram IDE hard drive
; a quick look at what the network is now
bash# /sbin/ifconfig ed1
ed1: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 193.119.96.16 netmask 0xffffff00 broadcast 193.119.96.255
ether 00:00:1b:21:dc:0d
bash# /usr/sbin/arp -a
wabbit.aladdin.co.uk (193.119.96.16) at 0:0:1b:21:dc:d permanent
alpha.aladdin.co.uk (193.119.96.17) at 0:c0:6c:43:88:81
bash# /sbin/ping 193.119.96.55
PING 193.119.96.55 (193.119.96.55): 56 data bytes
^C
--- 193.119.96.55 ping statistics ---
6 packets transmitted, 0 packets received, 100% packet loss
; ok we try to add a virtual machine on 193.119.96.55
bash# /sbin/ifconfig ed1 alias 193.119.96.55
ifconfig: ioctl (SIOCAIFADDR): File exists
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Weird error message what file
; try it anyway
bash# /sbin/ping 193.119.96.55
PING 193.119.96.55 (193.119.96.55): 56 data bytes
^C
--- 193.119.96.55 ping statistics ---
3 packets transmitted, 0 packets received, 100% packet loss
; nope not working try again.
bash# /sbin/ifconfig ed1 alias 193.119.96.55
bash#
; hmm worked that time ?
bash# /sbin/ping 193.119.96.55
PING 193.119.96.55 (193.119.96.55): 56 data bytes
ping: sendto: Host is down
ping: wrote 193.119.96.55 64 chars, ret=-1
ping: sendto: Host is down
ping: wrote 193.119.96.55 64 chars, ret=-1
ping: sendto: Host is down
ping: wrote 193.119.96.55 64 chars, ret=-1
^C
--- 193.119.96.55 ping statistics ---
3 packets transmitted, 0 packets received, 100% packet loss
; nope ???? What is going on.
Now if I try and ping 193.119.96.55 from another machine on the ethernet it
works !!
Chris Cain