Date: Wed, 28 Jan 2009 22:00:22 GMT From: Jin Guojun <jguojun@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/131094: dhclient sets wrong IP address Message-ID: <200901282200.n0SM0Mxm000920@www.freebsd.org> Resent-Message-ID: <200901282210.n0SMA1M1074173@freefall.freebsd.org>
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>Number: 131094
>Category: bin
>Synopsis: dhclient sets wrong IP address
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jan 28 22:10:01 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator: Jin Guojun
>Release: 7.1-RELEASE
>Organization:
>Environment:
FreeBSD test.Belkin 7.1-RELEASE FreeBSD 7.1-RELEASE #0: Sat Jan 10 20:47:04 PST 2009 root@test.Belkin:/usr/src/sys/i386/compile/MinMax i386
>Description:
When network connection (0.0 subnet)to nfe0 interface is down and then up in a few minutes, dhclient somehow set wrong IP (2.0 subnet) on the nfe0 interface.
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=8<VLAN_MTU>
ether 00:90:27:71:f2:13
inet 192.168.2.17 netmask 0xffffff00 broadcast 192.168.2.255
media: Ethernet autoselect (100baseTX)
status: active
nfe0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=8<VLAN_MTU>
ether 00:1e:90:c6:6f:e6
inet 192.168.0.99 netmask 0xffffff00 broadcast 192.168.0.255
inet 192.168.2.6 netmask 0xffffff00 broadcast 192.168.2.255
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
>How-To-Repeat:
Must have two netwrok interfaces.
One (fxp0) is on a network to a priamry router.
The second interface (nfe0) is on a private network (DHCP server may or may not be up).
Both interfaces are set to ="DHCP" in /etc/rc.conf.
Disconnect Ethernet cable from nfe0 (2nd NIC), the NIC will get a IP from primary network (in this case -- 192.168.2.6).
Clear this bad ip and configgure nfe0 to 192.168.0.##, then plug in the Ethernet cable on NIC nfe0, without DHCP server on, soner, this NIC will have two IP addresses shown in Description section.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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