Dnia 2012-01-14, sob o godzinie 11:11 -0600, Trey Dockendorf pisze: > > > > On Sat, Jan 14, 2012 at 8:41 AM, Radek Bursztynowski > <radek at bursztynowski.waw.pl> wrote: > > Dnia 2012-01-14, sob o godzinie 15:08 +0100, Dennis > Jacobfeuerborn pisze: > > > On 01/14/2012 02:59 PM, Radek Bursztynowski wrote: > > > Hi, > > > > > > I have installed CentOS 6.2 x86_64 and KVM/Qemu and I have some troubles > > > with network. > > > > > > The first case: > > > ----------------- > > > > > > The configuration is: > > > - CentOS 6.2 (hardware machine) has one Ethernet interface with static IP > > > address (eth0). > > > - Virtual machine has bridge network interface with eth0 interface on > > > CentOS 6.2. This bridge is created using wizard integrated with virt-manager. > > > - Bridge interface on virtual machine receives IP addres from DHCP server. > > > IP address is received well. > > > - All firewalls and SELinux are closed. > > > > > > Virtual machine has no any connection with CentOS 6.2 hardware machine, and > > > CentOS 6.2 has no any connection with virtual machine. But every others > > > machines have all connection with both virtual and CentOS 6.2 machine. > > > > > > The question: Why? > > > > > > The second case: > > > ---------------------- > > > > > > The configuration is: > > > - On CentOS 6.2 (hardware machine) I created bridhe (br0) with eth0 > > > hardware interface. Two situations: > > > + I force two different IP addresses for eth0 and br0 interfaces - there no > > > any connection with this server. So I don't test this case. > > > + I forced one IP addres for both eth0 and br0 interfaces. ifconfig shows > > > that eth0 has no IP address, br0 has IP address. So, I test this case. > > > - I use Red Hat documentation: > > > http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html-single/Virtualization/index.html#sect-Virtualization-Network_Configuration-Bridged_networking_with_libvirt) > > > - On virtual machine I created bridge connection with br0 interface on > > > CentOS 6.2. > > > - All machines have all connections. > > > - All firewalls and SELinux are closed. > > > > > > NFS server on CentOS 6.2 (hardware machine) doesn't serve exported file system. > > > > > > The questions: > > > 1. Is it proper that eth0 has no IP addres and bridge (br0) interface has? > > > 2. What about my NFS? NFS server worked well before starting virtualization. > > > > > > Who can me help with my troubles? > > > > You say you create bridge interfaces in your virtual machines. Why? Usually > > you don't do that you create a bridge only on the host. > > > > You also say you "forced" one IP address for both eth0 and br0. There is no > > need to force anything. eth0 shouldn't have an IP but br0 should have this > > IP instead. > > > > Regards, > > Dennis > > _______________________________________________ > > Dennis, > > Thanks for interesting. Few words explanation. > I have one network segment, and I try to joint virtual > machines to this segment. So my hardvare machine has > 192.168.0.1 address, gateway is 192.168.0.254, netmask = > 255.255.255.0. > > Regarding bridge on my virtual machine. When I started > virtualization I had NAT only in another network segment. So, > I look for solution adding virtual machines to my base network > segment. Previously I used VMware Server, and it was proper > solution. > > Regarding my force one IP addres for both interface. I used > this solution because eth0 has no any IP addres and I couldn't > find CentOS 6.2 server in the network. Using exactly Red Hat > configuration I have: > > # more ifcfg-eth0 > DEVICE=eth0 > TYPE=Ethernet > BOOTPROTO=none > IPADDR=192.168.0.1 > NETMASK=255.255.255.0 > PREFIX=24 > GATEWAY=192.168.0.254 > DNS1=192.168.0.199 > DNS2=194.204.159.1 > DNS3=194.204.152.34 > DEFROUTE=yes > IPV4_FAILURE_FATAL=yes > IPV6INIT=no > NAME=eth0 > ONBOOT=yes > BRIDGE=br0 > MTU=9000 > DOMAIN=bursztynowski.waw.pl > UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03 > > # more ifcfg-br0 > DEVICE=br0 > TYPE=Bridge > BOOTPROTO=dhcp > #IPADDR=192.168.0.1 > #NETMASK=255.255.255.0 > #PREFIX=24 > #GATEWAY=192.168.0.254 > #DNS1=192.168.0.199 > #DNS2=194.204.159.1 > #DNS3=194.204.152.34 > ONBOOT=yes > DELAY=0 > > (previous configuration br0 was: > BOOTPRO=static > and with no '#' characters. Then all worked excluding NFS. > > > # ifconfig > br0 Link encap:Ethernet HWaddr > 00:50:8D:94:2F:B7 > inet addr:192.168.0.92 Bcast:192.168.0.255 > Mask:255.255.255.0 > inet6 addr: fe80::250:8dff:fe94:2fb7/64 > Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:9000 > Metric:1 > RX packets:16 errors:0 dropped:0 overruns:0 > frame:0 > TX packets:26 errors:0 dropped:0 overruns:0 > carrier:0 > collisions:0 > txqueuelen:0 > RX bytes:3034 (2.9 KiB) TX bytes:4313 (4.2 > KiB) > > eth0 Link encap:Ethernet HWaddr 00:50:8D:94:2F:B7 > inet6 addr: fe80::250:8dff:fe94:2fb7/64 Scope:Link > UP BROADCAST RUNNING PROMISC MULTICAST MTU:9000 > Metric:1 > RX packets:57255 errors:0 dropped:0 overruns:0 > frame:0 > TX packets:60263 errors:0 dropped:0 overruns:0 > carrier:0 > collisions:0 txqueuelen:1000 > RX bytes:21481457 (20.4 MiB) TX bytes:15768417 > (15.0 MiB) > Interrupt:23 Base address:0x8000 > > lo Link encap:Local Loopback > inet addr:127.0.0.1 Mask:255.0.0.0 > inet6 addr: ::1/128 Scope:Host > UP LOOPBACK RUNNING MTU:16436 Metric:1 > RX packets:30723 errors:0 dropped:0 overruns:0 > frame:0 > TX packets:30723 errors:0 dropped:0 overruns:0 > carrier:0 > collisions:0 txqueuelen:0 > RX bytes:92725098 (88.4 MiB) TX bytes:92725098 > (88.4 MiB) > > Should I replace static and dhcp addresses between eth0 and > br0 interface? > > Regards, > Radek > > > > > > > > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt > > > > > To use bridging on the virtual host you have to assign the IPs to br0 > and then add "Bridge=br0" to ifcfg-eth0. I have working examples > here, http://itscblog.tamu.edu/startup-guide-for-kvm-on-centos-6/. Thanks. I used this advice as above. All work excluding my NFS. Regards, Radek -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20120114/e271d929/attachment-0006.html>