Bug 30708

Summary:	DHCP and multiple interfaces
Product:	Base System	Reporter:	Richard Tobin <richard>
Component:	misc	Assignee:	Doug Barton <dougb>
Status:	Closed FIXED
Severity:	Affects Only Me
Priority:	Normal
Version:	4.4-RELEASE
Hardware:	Any
OS:	Any

Description Richard Tobin 2001-09-21 17:00:02 UTC

/etc/rc.network takes care to gather up all the DHCP interfaces to pass
to a single dhclient program.

/etc/pccard_ether on the other hand expects to run a separate dhclient
for each interface, carefully storing their pids in different files.

If there are multiple pccard interfaces, or (more likely) a built-in
interface and a pccard interface (eg a wireless card), multiple
instances of dhclient will be started.  All but the first will fail
with "can't bind to dhcp address: Address already in use".

Fix: 

Either make it possible to run multiple dhclient programs (perhaps
impossible) or keep a record of the interfaces requiring dhcp and
restart dhclient when the list changes.
How-To-Repeat: 
Set the ifconfig_xxx variable for a built-in interface to DHCP, and
set pccard_ifconfig to DHCP.  Insert a pcmcia network card.

Comment 1 Doug Barton freebsd_committer

2003-02-02 12:45:39 UTC

State Changed
From-To: open->closed


You need to add configuration for all your interfaces in 
/etc/dhclient.conf. 'man 5 dhclient.conf' for more info.

Comment 2 Doug Barton freebsd_committer

2003-02-02 12:45:39 UTC

Responsible Changed
From-To: freebsd-bugs->dougb


I closed it.