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Message-Id: <201010032305.o93N5xHa054057@www.freebsd.org>
Date: Sun, 3 Oct 2010 23:05:59 GMT
From: Tobias Herre <tobias.herre@srh-hochschule-berlin.de>
To: freebsd-gnats-submit@FreeBSD.org
Subject: routed turns RIP off if just one network card is present
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>Number:         151186
>Category:       bin
>Synopsis:       [patch] routed(8) turns RIP off if just one network card is present
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Oct 03 23:10:04 UTC 2010
>Closed-Date:    
>Last-Modified:  Sat Oct 23 07:50:15 UTC 2010
>Originator:     Tobias Herre
>Release:        FreeBSD 8.1 / 5.5 / 7.x
>Organization:
SRH Hochschule Berlin
>Environment:
FreeBSD grusel 8.1-STABLE FreeBSD 8.1-STABLE #1: Thu Sep 16 13:40:46 UTC 2010     root@grusel2.otauni.de:/usr/obj/usr/src/sys/SRHPOWER  amd64
>Description:
route daemon (routed -q) turns RIP off if just one network adapter exists.

>How-To-Repeat:
Take two machines connect them via a switch.
First machine is called router, has gateway_enable="YES"
and shows the following interfaces

router# ifconfig
bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=8009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,LINKSTATE>
        ether 00:50:45:5d:9a:bc
        inet 192.168.1.158 netmask 0xffffff00 broadcast 192.168.1.255
        media: Ethernet autoselect (100baseTX <full-duplex,flag0,flag1>)
        status: active
bge1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=8009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,LINKSTATE>
        ether 00:50:45:5d:9a:bd
        inet 192.168.17.17 netmask 0xffffff00 broadcast 192.168.17.255
        media: Ethernet autoselect (none)
        status: no carrier
..


and the second machine called client:

client# ifconfig
bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
    options=8009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,LINKSTATE>
    ether 00:50:45:5d:c6:ec
    inet 192.168.1.157 netmask 0xffffff00 broadcast 192.168.1.255
    media: Ethernet autoselect (100baseTX <full-duplex,flag0,flag1>)
    status: active
bge1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
    options=8009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,LINKSTATE>
    ether 00:50:45:5d:c6:ed
    media: Ethernet autoselect (none)
    status: no carrier
..

in this case the second machine (client) has two network adapters but  bge1 has no ip assigned and is down.


Now on the router start the route daemon:

router# /sbin/routed -s -d -t
-- 10:43:21 --
Tracing actions started
Add interface bge0 192.168.1.158  -->192.168.1.0 (mask 0xffffff00)
RCVBUF=61440
turn on RIP
Add interface bge1 192.168.17.17  -->192.168.17.0 (mask 0xffffff00)
Add interface lo0  127.0.0.1      -->127.0.0.1 (mask 0xffffffff) <LOOPBACK> <PASSIVE>
Add    127.0.0.1 (mask 0xffffffff)-->127.0.0.1 metric=0  lo0 <IF>
Add    192.168.17.0    -->192.168.17.17    metric=0  bge1 <IF>
Add    192.168.1.0     -->192.168.1.158    metric=0  bge0 <IF>
-- 10:43:21 --
ignore RTM_NEWMADDR for AF 173
ignore RTM_NEWMADDR for AF 173
ignore RTM_NEWMADDR without dst
ignore RTM_NEWMADDR without dst
-- 10:43:26 --
send all routes and inhibit dynamic updates for 4.884 sec


and on the client:

client# /sbin/routed -d -q -t
-- 10:45:36 --
Tracing actions started
Add interface bge0 192.168.1.157  -->192.168.1.0 (mask 0xffffff00)
RCVBUF=61440
turn on RIP
Add interface lo0  127.0.0.1      -->127.0.0.1 (mask 0xffffffff) <LOOPBACK> <PASSIVE>
Add    127.0.0.1 (mask 0xffffffff)-->127.0.0.1 metric=0  lo0 <IF>
Add    192.168.1.0     -->192.168.1.157    metric=0  bge0 <IF>
-- 10:45:36 --
ignore RTM_NEWMADDR for AF 172
-- 10:45:36 --
Add #1 192.168.1.0     -->192.168.1.158    metric=1  bge0 10:45:36
Add    192.168.17.0    -->192.168.1.158    metric=1  bge0 10:45:36
-- 10:45:37 --
turn on Router Discovery client using 192.168.1.158 via bge0
Add    0.0.0.0         -->192.168.1.158    metric=15 bge0 <RDISC>
turn off RIP
Del    192.168.17.0    -->192.168.1.158    metric=1  bge0 10:45:36


As not expected the route to net 192.168.17.0 is deleted immediately and
RIP is turned off.

Brining up the second interface on the client lets routed work as expected:

client# ifconfig bge1 192.168.18.18
client# ifconfig bge1 up
client# /sbin/routed -d -q -t
-- 10:51:12 --
Tracing actions started
Add interface bge0 192.168.1.157  -->192.168.1.0 (mask 0xffffff00)
RCVBUF=61440
turn on RIP
Add interface bge1 192.168.18.18  -->192.168.18.0 (mask 0xffffff00)
Add interface lo0  127.0.0.1      -->127.0.0.1 (mask 0xffffffff) <LOOPBACK> <PASSIVE>
Add    127.0.0.1 (mask 0xffffffff)-->127.0.0.1 metric=0  lo0 <IF>
Add    192.168.18.0    -->192.168.18.18    metric=0  bge1 <IF>
Add    192.168.1.0     -->192.168.1.157    metric=0  bge0 <IF>
-- 10:51:12 --
ignore RTM_NEWMADDR for AF 172
ignore RTM_NEWMADDR without dst
-- 10:51:12 --
Add #1 192.168.1.0     -->192.168.1.158    metric=1  bge0 10:51:12
Add    192.168.17.0    -->192.168.1.158    metric=1  bge0 10:51:12
-- 10:51:13 --
turn on Router Discovery client using 192.168.1.158 via bge0
Add    0.0.0.0         -->192.168.1.158    metric=15 bge0 <RDISC>


>Fix:
Workaraound: install and configure a second network adapter and bring it up.
Or apply the patch.


Patch attached with submission follows:

--- sbin/routed/rdisc.orig      2010-09-22 11:02:00.040741231 +0000
+++ sbin/routed/rdisc.c 2010-10-03 22:37:08.280021020 +0000
@@ -557,7 +557,7 @@
        }

        /* turn RIP on or off */
-       if (!rdisc_ok || rip_interfaces > 1) {
+       if (!rdisc_ok || rip_interfaces >= 1) {
                rip_on(0);
        } else {
                rip_off(); 


>Release-Note:
>Audit-Trail:
>Unformatted:
