Description of problem:Secondary interface eth1 on guests child not working, only eth0 is working.Running guest are unable to run functional with additional interface (eth1), arp issue come for eth1 and no communication on eth1. Version-Release number of selected component (if applicable):0.8.2-1 How reproducible: Steps to Reproduce: 1.Setup kvm structure for kvm guest,and run below command for setup two nic's 2.Start the VM child guest to invoke two ethernet's /usr/bin/qemu-kvm -M pc -m 256 -smp 1 -name myguest1 -uuid 5dcb91e1-0a1e-8846-3859-ee03cb362427 -nographic -monitor unix:/var/lib/libvirt/qemu/myguest1.monitor,server,nowait -boot c -drive file=/dev/vmdata/vm.root,if=ide,index=0,boot=on -drive file=/dev/vmdata/vm.var,if=ide,index=1 -drive file=/dev/vmdata/vm.swap,if=ide,index=3 -net nic,macaddr=52:54:00:ea:aa:fe,vlan=0,name=nic0 -net tap,ifname=tap3,script=/etc/KVM/vm-tap3.sh,vlan=0,name=tap3 -net nic,macaddr=52:54:00:a7:9b:c1,vlan=1,name=nic1 -net tap,ifname=tap30,script=/etc/KVM/vm-tap30.sh,vlan=1,name=tap30 -serial pty -parallel none -usb & 3. Now give ip on eth1 on kvm guest myguest and its not pining/working for outerworld, Note: my setup contains public IP's i am not using NAT Actual results: [root@host ~]# arp -e Address HWtype HWaddress Flags Mask Iface x.x.x.x ether 52:54:00:56:40:56 C tap1 x.x.x.x (incomplete) tap30 x.x.x.x ether 00:d0:d3:80:64:0a C eth0 Expected results: arp entry should be define for eth1 as like for eth0, and it should be working. Additional info: I am running KVM on FC12 with tap networking in routed mode. All is working now i am facing problem to setup two NIC's on kvm guest. Here below little detail Now tap3 is for eth0 and tap30 for eth1 for vm child, and desire scripts use to create tap and put routes automatically, as all is working f9. Now when guest boot two interfaces eth0 and eth1, now eth0 is working f9 , but when i assign ip on eth1 and up interface its not pinging/working inside mother/outerworld After some more diagnose via tcpdump and arp info, i come to know that on KVM host, tap30 which is used for eth1 on guest vm, qemu-kvm unable to define its arp entry [root@host ~]# arp -e Address HWtype HWaddress Flags Mask Iface x.x.x.x ether 52:54:00:56:40:56 C tap1 x.x.x.x (incomplete) tap30 x.x.x.x ether 00:d0:d3:80:64:0a C eth0 and on KVM guest on eth1, tcpdump shows arp who has replies, as i don't now why its fails or treat like eth0 , as beofre when i run guests using virsh start guest-vm then all is working f9 , but when i start vm through above script qemu-kvm, its unable to set properly eth1 for guest vm, any ideas or suggestions please ???????? Muzi
Same results for FC13, can any one please verify it ? Thanks Muzi
Can any please check this ? we are badly stuck with secondary interface, as same is working till fc11, and broken in fc12 and also same behaviour in fc13 :( Thanks Muzi
I think i have now reach near to the problem, eth1 is basically receiving packets but not transmit data, i think reason is eth1 shares both an interrupt and memory access address with usb device, cat /proc/interrupts CPU0 0: 219 IO-APIC-edge timer 1: 6 IO-APIC-edge i8042 4: 88 IO-APIC-edge serial 8: 1 IO-APIC-edge rtc0 9: 0 IO-APIC-fasteoi acpi 10: 32103630 IO-APIC-fasteoi eth0 11: 330595 IO-APIC-fasteoi uhci_hcd:usb1, eth1 As see in 11: , how can i fix or change interrupts for eth1 on child guest ? kindly suggest please. Can i try to disable usb device ? Thanks Muzi
Special Request and Appeal for Mr Daniel Veillard and other relative Red hat members as per this thread, Please Please Please Please Please Please Please Please Please give some time to this issue, i am tooooooooooooooooo much dis hearted, no member of redhat post any single reply on this thread :(, Thanks Muzi