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KVM bridge networking: First ARP packet gets answered by wrong host
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I have a host (192.168.1.106) Linux server with KVM and one Linux server as virtualized guest (192.168.1.105).
The guest uses a network bridge and both host and guest are reachable over the same network interface card.
My issue is that the first ARP packet asking for the IP of my virtualized guest, in this example 192.168.1.105 always gets answered by my host machine 192.168.1.106 with the wrong MAC address. The second ARP packet however always finds its way to the guest and gets answered correctly. Needles to say that this is something that brings trouble...
$ arping -I wlp4s0 192.168.1.105
ARPING 192.168.1.105 from 192.168.1.100 wlp4s0
Unicast reply from 192.168.1.105 [10:7B:44:80:E0:85] 3.752ms
Unicast reply from 192.168.1.105 [52:54:00:8D:A2:C8] 3.838ms
Unicast reply from 192.168.1.105 [52:54:00:8D:A2:C8] 2.591ms
3: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 10:7b:44:80:e0:85 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.106/24 brd 192.168.1.255 scope global noprefixroute enp5s0
valid_lft forever preferred_lft forever
inet6 fe80::127b:44ff:fe80:e082/64 scope link
valid_lft forever preferred_lft forever
6: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:f9:4b:f9 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
7: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:f9:4b:f9 brd ff:ff:ff:ff:ff:ff
10: macvtap0@enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 500
link/ether 52:54:00:8d:a2:c8 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.105/24 brd 192.168.1.255 scope global noprefixroute macvtap0
valid_lft forever preferred_lft forever
inet6 fe80::5054:ff:fe8d:a2c8/64 scope link
valid_lft forever preferred_lft forever
virsh # iface-dumpxml macvtap0
<interface type='ethernet' name='macvtap0'>
<mtu size='1500'/>
<link speed='1000' state='up'/>
<mac address='52:54:00:8d:a2:c8'/>
</interface>
virsh # iface-dumpxml enp5s0
<interface type='ethernet' name='enp5s0'>
<mtu size='1500'/>
<link speed='1000' state='up'/>
<mac address='10:7b:44:80:e0:85'/>
</interface>
virsh # version
Compiled against library: libvirt 4.5.0
Using library: libvirt 4.5.0
Using API: QEMU 4.5.0
Running hypervisor: QEMU 3.0.0
Does someone have an idea what might be the problem? Or how to fix it?
I also looked at a tcpdump from the guest and the first ARP packet never arrives there.
linux networking virtualization kvm-virtualization bridge
asked 3 mins ago
QubasaQubasa
1
New contributor
Qubasa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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I have a host (192.168.1.106) Linux server with KVM and one Linux server as virtualized guest (192.168.1.105).
The guest uses a network bridge and both host and guest are reachable over the same network interface card.
My issue is that the first ARP packet asking for the IP of my virtualized guest, in this example 192.168.1.105 always gets answered by my host machine 192.168.1.106 with the wrong MAC address. The second ARP packet however always finds its way to the guest and gets answered correctly. Needles to say that this is something that brings trouble...
$ arping -I wlp4s0 192.168.1.105
ARPING 192.168.1.105 from 192.168.1.100 wlp4s0
Unicast reply from 192.168.1.105 [10:7B:44:80:E0:85] 3.752ms
Unicast reply from 192.168.1.105 [52:54:00:8D:A2:C8] 3.838ms
Unicast reply from 192.168.1.105 [52:54:00:8D:A2:C8] 2.591ms
3: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 10:7b:44:80:e0:85 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.106/24 brd 192.168.1.255 scope global noprefixroute enp5s0
valid_lft forever preferred_lft forever
inet6 fe80::127b:44ff:fe80:e082/64 scope link
valid_lft forever preferred_lft forever
6: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:f9:4b:f9 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
7: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:f9:4b:f9 brd ff:ff:ff:ff:ff:ff
10: macvtap0@enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 500
link/ether 52:54:00:8d:a2:c8 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.105/24 brd 192.168.1.255 scope global noprefixroute macvtap0
valid_lft forever preferred_lft forever
inet6 fe80::5054:ff:fe8d:a2c8/64 scope link
valid_lft forever preferred_lft forever
virsh # iface-dumpxml macvtap0
<interface type='ethernet' name='macvtap0'>
<mtu size='1500'/>
<link speed='1000' state='up'/>
<mac address='52:54:00:8d:a2:c8'/>
</interface>
virsh # iface-dumpxml enp5s0
<interface type='ethernet' name='enp5s0'>
<mtu size='1500'/>
<link speed='1000' state='up'/>
<mac address='10:7b:44:80:e0:85'/>
</interface>
virsh # version
Compiled against library: libvirt 4.5.0
Using library: libvirt 4.5.0
Using API: QEMU 4.5.0
Running hypervisor: QEMU 3.0.0
Does someone have an idea what might be the problem? Or how to fix it?
I also looked at a tcpdump from the guest and the first ARP packet never arrives there.
linux networking virtualization kvm-virtualization bridge
asked 3 mins ago
QubasaQubasa
1
New contributor
Qubasa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have a host (192.168.1.106) Linux server with KVM and one Linux server as virtualized guest (192.168.1.105).
The guest uses a network bridge and both host and guest are reachable over the same network interface card.
My issue is that the first ARP packet asking for the IP of my virtualized guest, in this example 192.168.1.105 always gets answered by my host machine 192.168.1.106 with the wrong MAC address. The second ARP packet however always finds its way to the guest and gets answered correctly. Needles to say that this is something that brings trouble...
$ arping -I wlp4s0 192.168.1.105
ARPING 192.168.1.105 from 192.168.1.100 wlp4s0
Unicast reply from 192.168.1.105 [10:7B:44:80:E0:85] 3.752ms
Unicast reply from 192.168.1.105 [52:54:00:8D:A2:C8] 3.838ms
Unicast reply from 192.168.1.105 [52:54:00:8D:A2:C8] 2.591ms
3: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 10:7b:44:80:e0:85 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.106/24 brd 192.168.1.255 scope global noprefixroute enp5s0
valid_lft forever preferred_lft forever
inet6 fe80::127b:44ff:fe80:e082/64 scope link
valid_lft forever preferred_lft forever
6: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:f9:4b:f9 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
7: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:f9:4b:f9 brd ff:ff:ff:ff:ff:ff
10: macvtap0@enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 500
link/ether 52:54:00:8d:a2:c8 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.105/24 brd 192.168.1.255 scope global noprefixroute macvtap0
valid_lft forever preferred_lft forever
inet6 fe80::5054:ff:fe8d:a2c8/64 scope link
valid_lft forever preferred_lft forever
virsh # iface-dumpxml macvtap0
<interface type='ethernet' name='macvtap0'>
<mtu size='1500'/>
<link speed='1000' state='up'/>
<mac address='52:54:00:8d:a2:c8'/>
</interface>
virsh # iface-dumpxml enp5s0
<interface type='ethernet' name='enp5s0'>
<mtu size='1500'/>
<link speed='1000' state='up'/>
<mac address='10:7b:44:80:e0:85'/>
</interface>
virsh # version
Compiled against library: libvirt 4.5.0
Using library: libvirt 4.5.0
Using API: QEMU 4.5.0
Running hypervisor: QEMU 3.0.0
Does someone have an idea what might be the problem? Or how to fix it?
I also looked at a tcpdump from the guest and the first ARP packet never arrives there.
linux networking virtualization kvm-virtualization bridge
asked 3 mins ago
QubasaQubasa
1
New contributor
Qubasa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have a host (192.168.1.106) Linux server with KVM and one Linux server as virtualized guest (192.168.1.105).
The guest uses a network bridge and both host and guest are reachable over the same network interface card.
My issue is that the first ARP packet asking for the IP of my virtualized guest, in this example 192.168.1.105 always gets answered by my host machine 192.168.1.106 with the wrong MAC address. The second ARP packet however always finds its way to the guest and gets answered correctly. Needles to say that this is something that brings trouble...
$ arping -I wlp4s0 192.168.1.105
ARPING 192.168.1.105 from 192.168.1.100 wlp4s0
Unicast reply from 192.168.1.105 [10:7B:44:80:E0:85] 3.752ms
Unicast reply from 192.168.1.105 [52:54:00:8D:A2:C8] 3.838ms
Unicast reply from 192.168.1.105 [52:54:00:8D:A2:C8] 2.591ms
3: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 10:7b:44:80:e0:85 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.106/24 brd 192.168.1.255 scope global noprefixroute enp5s0
valid_lft forever preferred_lft forever
inet6 fe80::127b:44ff:fe80:e082/64 scope link
valid_lft forever preferred_lft forever
6: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:f9:4b:f9 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
7: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:f9:4b:f9 brd ff:ff:ff:ff:ff:ff
10: macvtap0@enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 500
link/ether 52:54:00:8d:a2:c8 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.105/24 brd 192.168.1.255 scope global noprefixroute macvtap0
valid_lft forever preferred_lft forever
inet6 fe80::5054:ff:fe8d:a2c8/64 scope link
valid_lft forever preferred_lft forever
virsh # iface-dumpxml macvtap0
<interface type='ethernet' name='macvtap0'>
<mtu size='1500'/>
<link speed='1000' state='up'/>
<mac address='52:54:00:8d:a2:c8'/>
</interface>
virsh # iface-dumpxml enp5s0
<interface type='ethernet' name='enp5s0'>
<mtu size='1500'/>
<link speed='1000' state='up'/>
<mac address='10:7b:44:80:e0:85'/>
</interface>
virsh # version
Compiled against library: libvirt 4.5.0
Using library: libvirt 4.5.0
Using API: QEMU 4.5.0
Running hypervisor: QEMU 3.0.0
Does someone have an idea what might be the problem? Or how to fix it?
I also looked at a tcpdump from the guest and the first ARP packet never arrives there.
linux networking virtualization kvm-virtualization bridge
linux networking virtualization kvm-virtualization bridge
asked 3 mins ago
QubasaQubasa
1
New contributor
Qubasa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 mins ago
QubasaQubasa
1
New contributor
Qubasa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 mins ago
QubasaQubasa
1
New contributor
Qubasa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 mins ago
QubasaQubasa
1
asked 3 mins ago
QubasaQubasa
1
1
New contributor
Qubasa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Qubasa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Qubasa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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