From owner-freebsd-net  Tue Jul  3 10:10:44 2001
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Date: Tue, 03 Jul 2001 19:10:28 +0200
From: Roman Le Houelleur <roman@IPricot.com>
Organization: IPricot
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To: freebsd-net <freebsd-net@FreeBSD.org>
Cc: freebsd-stable <freebsd-stable@FreeBSD.org>
Subject: Setting ip addr deletes routes
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hi,

 > uname -a
 FreeBSD roman.fr.ipricot.com 4.3-STABLE FreeBSD 4.3-STABLE #0: \
 Tue Jul  3 17:28:04 CEST 2001 \
 root@roman.fr.ipricot.com:/usr/src/sys/compile/ROMAN_SB  i386

I have only updated src-sys, the rest of the system comes from
a 4.3 RC4.

 > ifconfig -a
 rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
     inet 192.168.31.181 netmask 0xffffff00 broadcast 192.168.31.255
     ether 00:50:fc:01:a3:3c 
     media: autoselect (100baseTX) status: active
     supported media: autoselect 100baseTX <full-duplex> 100baseTX
10baseT/UTP
     <full-duplex> 10baseT/UTP 100baseTX <hw-loopback>
 vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
     inet 192.168.42.1 netmask 0xffffff00 broadcast 192.168.42.255
     ether 00:50:ba:05:9a:8f 
     media: autoselect (100baseTX <full-duplex>) status: active
     supported media: autoselect 100baseTX <full-duplex> 100baseTX
10baseT/UTP
     <full-duplex> 10baseT/UTP none
 sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 552
 lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet 127.0.0.1 netmask 0xff000000 
 ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500

 > netstat -rn
 Destination        Gateway            Flags      Netif Expire
 default            192.168.31.254     UGSc        0        0      rl0
 127.0.0.1          127.0.0.1          UH          0        0      lo0
 192.168.31         link#1             UC          2        0      rl0
=>
 192.168.42         link#2             UC          0        0      vr0
=>
 195.154.74         link#1             UCSc        1        0      rl0
=>

 > ifconfig rl0 192.168.31.181 netmask 0xffffff00
(yes, this is the same ip addr, but same results with another one)
 > netstat -rn
 Destination        Gateway            Flags      Netif Expire
 127.0.0.1          127.0.0.1          UH          0        0      lo0
 192.168.31         link#1             UC          2        0      rl0
=>
 192.168.42         link#2             UC          0        0      vr0
=>

So, here is the question
 1. Is this a bug ?
 2. or is it a user process I should have updated too ?
 3. maybe a new functionnality I don't understand ?

thanks,

Roman.

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