[Xen-users] ifup fails on CentOS 4

[Michael Watters <michael@xxxxxxxxxx>]

Hello,

I have some domU accounts running CentOS 4.4 and whenever I try to bring 
up the network interface it fails with the following errors:
[root@xxxxxxxxxxxxxxxxxxx] ~ # ifup eth0
Usage: grep [OPTION]... PATTERN [FILE]...
Try `grep --help' for more information.
Usage: grep [OPTION]... PATTERN [FILE]...
Try `grep --help' for more information.
Usage: arping [-fqbDUAV] [-c count] [-w timeout] [-I device] [-s source] 
destination
-f : quit on first reply
-q : be quiet
-b : keep broadcasting, don't go unicast
-D : duplicate address detection mode
-U : Unsolicited ARP mode, update your neighbours
-A : ARP answer mode, update your neighbours
-V : print version and exit
-c count : how many packets to send
-w timeout : how long to wait for a reply
-I device : which ethernet device to use (eth0)
-s source : source ip address
destination : ask for what ip address
Error, some other host already uses address xx.xx.xx.xx

However there is NOT another host using that IP.  If I bring the 
interface up manually using ifconfig everything works fine.  I even 
added my own init script to bring up the eth0 interface at boot and it 
works fine.  Anybody else have problems using ifup?
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