Bug 620246

Description of problem: qemu-kvm running guest are unable to run functional with additional interface (eth1), arp issue come for eth1 and no communication on eth1, here below in detail in Additional info section.



Version-Release number of selected component (if applicable): 0.11.0-13


How reproducible:


Steps to Reproduce:
1. Setup kvm structure for kvm guest,and run below command for setup two nic's
2. /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

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