Re: [Fedora-xen] Dom0 running dhcpd and domU dhclient won't work on the same machine
04.03.2011 19:57, Roberto Fichera kirjoitti: >> >> 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. > Great that you solved it. I had to modify /etc/sysctl.conf so that br0 bridge works as expected. Here are the network related lines: net.ipv4.ip_forward = 1 net.ipv4.conf.default.rp_filter = 1 net.ipv4.conf.default.accept_source_route = 0 net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-arptables = 0 net.ipv4.conf.default.arp_notify = 1 Without applying correct values into sysctl.conf network didn't work as expected for the DomU. This isn't a bug though: you just need to find good documentation to get it right. Regards, Marko Ristola >>> Regards, >>> Marko Ristola >>> >>> -- >>> xen mailing list >>> xen@lists.fedoraproject.org >>> https://admin.fedoraproject.org/mailman/listinfo/xen >>> >> -- >> xen mailing list >> xen@lists.fedoraproject.org >> https://admin.fedoraproject.org/mailman/listinfo/xen >> > -- xen mailing list xen@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/xen
Re: [Fedora-xen] Dom0 running dhcpd and domU dhclient won't work on the same machine
On 03/04/2011 06:36 PM, Roberto Fichera wrote: > 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 >>> 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@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? 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@lists.fedoraproject.org >> https://admin.fedoraproject.org/mailman/listinfo/xen >> > -- > xen mailing list > xen@lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/xen > -- xen mailing list xen@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/xen
Re: [Fedora-xen] Dom0 running dhcpd and domU dhclient won't work on the same machine
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 To: Marko Ristola Cc: xen@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 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@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@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/xen -- xen mailing list xen@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/xen -- xen mailing list xen@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/xen
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 >> 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@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@lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/xen > -- xen mailing list xen@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/xen
Re: [Fedora-xen] Dom0 running dhcpd and domU dhclient won't work on the same machine
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@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@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/xen
