04.03.2011 14:16, Roberto Fichera kirjoitti: > Hi All, > > does anyone has the same problem on the same configuration? > Basically all the domU aren't able to get their ip address from the DHCPD > server running under the same dom0 with kernel 2.6.32.26-174.xendom0.fc12.x86_64. > I tried different domU kernels but it seems doesn't work at all. > > Any idea how to solve it? > > Thanks in advance. > Roberto Fichera. > -- > xen mailing list > xen(a)lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/xen It should be solvable by configuring. I use bridge device br0, a remote dnsmasq server for DHCP and DNS. sysctl.conf is configured so that br0 works as expected: passes DHCP requests thrue. Your case is different than mine, so you need different configurations. Googling examples is a good start. You could try to use iptables LOG rules to track down problems.

Regards, Marko Ristola -- xen mailing list xen(a)lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/xen

Are they on the same network or clan? Is the firewall or host.allow file blocking you or maybe selinux? Is it a windows machine trying to get the address or linux? Do you see anything in the logs or only in tcpdump?

Jon -----Original message----- *From: *Roberto Fichera <kernel(a)tekno-soft.it&gt;* To: *Marko Ristola <marko.ristola(a)kolumbus.fi&gt;* Cc: *xen(a)lists.fedoraproject.org* Sent: *Fri, Mar 4, 2011 17:39:06 GMT+00:00* Subject: *Re: [Fedora-xen] Dom0 running dhcpd and domU dhclient won't work on the same machine On 03/04/2011 05:17 PM, Marko Ristola wrote: > 04.03.2011 14:16, Roberto Fichera kirjoitti: >> Hi All, >> >> does anyone has the same problem on the same configuration? >> Basically all the domU aren't able to get their ip address from the DHCPD >> server running under the same dom0 with kernel *MailScanner warning: numerical links are often malicious:* 2.6.32.26-174.xendom0.fc12.x86_64. >> I tried different domU kernels but it seems doesn't work at all. >> >> Any idea how to solve it? >> >> Thanks in advance. >> Roberto Fichera. >> -- >> xen mailing list >> xen(a)lists.fedoraproject.org >> https://admin.fedoraproject.org/mailman/listinfo/xen > It should be solvable by configuring. > > I use bridge device br0, a remote dnsmasq server for DHCP and DNS. sysctl.conf is > configured so that br0 works as expected: passes DHCP requests thrue. > > Your case is different than mine, so you need different configurations. > > Googling examples is a good start. > You could try to use iptables LOG rules to track down problems. I mean, it seems working because the dhcpd log shows that the requests are coming from the domU but the domU doesn't get the DHCPD answare. I also read about setting off ethernet tx offload under dom0 via "ethtool -K eth0 tx off" but it seems not helping to solve anything, at least in my case. Which kind of configuration you made in your side? > Regards, > Marko Ristola > > -- > xen mailing list > xen(a)lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/xen > -- xen mailing list xen(a)lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/xen

> > I also read about setting off ethernet tx offload under dom0 via "ethtool -K eth0 tx off" > but it seems not helping to solve anything, at least in my case. > > Which kind of configuration you made in your side? I was just able to solve it right now!!! What I do is the ethtool setup like above in dom0 than afterwards I made a service dhcpd restart and it worked fine at the price of loosing the tx offload automatically made by the network card.

>> Regards, >> Marko Ristola >> >> -- >> xen mailing list >> xen(a)lists.fedoraproject.org >> https://admin.fedoraproject.org/mailman/listinfo/xen >> > -- > xen mailing list > xen(a)lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/xen >