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Tap interface within a virtual machine has NO-CARRIER
kvm virtualization and external access to guest OS on ubuntu 9.04Internet access via OpenVPNhowto only tunnel specific hosts route through openvpn client on tomatoKVM/Libvirt bridged/routed networking not working on newer guest kernelsAssign individual NIC to KVM guestKVM Network configuration + VLAN trunckKVM bridging for virtual machines is not workingAllowing SSH on a server with an active OpenVPN clientsite to site openvpn with Merlin and DD-WRTHow to get OpenVPN Client (Mikrotik RouterOS) <-> OpenVPN server (Debian/Linux) setup to work
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I am trying to hook up a virtual machine to a host using openvpn.
When i create a tap interface within the virtual machine using:
/usr/sbin/openvpn --mktun --dev tap1
The state of the tap interface is always "NO-CARRIER"
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether fa:16:3e:07:55:b5 brd ff:ff:ff:ff:ff:ff
inet 12.1.1.2/24 brd 12.1.1.255 scope global eth0
inet6 fe80::f816:3eff:fe07:55b5/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
3: br-ex: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
inet 10.10.100.2/24 scope global br-ex
inet6 fe80::3c23:adff:feb3:6d9d/64 scope link
valid_lft forever preferred_lft forever
8: tap1: <NO-CARRIER,BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 100
link/ether ce:e9:4a:1d:80:55 brd ff:ff:ff:ff:ff:ff
Any ideas why this could be happening?
I have checked to see the permissions of /dev/net/tun and it seems fine:
root@ip-10-66-210-99:~# ls -l /dev/net/tun
crw-rw-rw- 1 root root 10, 200 2014-02-15 07:15 /dev/net/tun
On the host itself there seems to be no issues.
What am i missing?
virtual-machines openvpn kvm-virtualization tap
asked Feb 18 '14 at 7:41
NetCubistNetCubist
112
add a comment |
I am trying to hook up a virtual machine to a host using openvpn.
When i create a tap interface within the virtual machine using:
/usr/sbin/openvpn --mktun --dev tap1
The state of the tap interface is always "NO-CARRIER"
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether fa:16:3e:07:55:b5 brd ff:ff:ff:ff:ff:ff
inet 12.1.1.2/24 brd 12.1.1.255 scope global eth0
inet6 fe80::f816:3eff:fe07:55b5/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
3: br-ex: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
inet 10.10.100.2/24 scope global br-ex
inet6 fe80::3c23:adff:feb3:6d9d/64 scope link
valid_lft forever preferred_lft forever
8: tap1: <NO-CARRIER,BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 100
link/ether ce:e9:4a:1d:80:55 brd ff:ff:ff:ff:ff:ff
Any ideas why this could be happening?
I have checked to see the permissions of /dev/net/tun and it seems fine:
root@ip-10-66-210-99:~# ls -l /dev/net/tun
crw-rw-rw- 1 root root 10, 200 2014-02-15 07:15 /dev/net/tun
On the host itself there seems to be no issues.
What am i missing?
virtual-machines openvpn kvm-virtualization tap
asked Feb 18 '14 at 7:41
NetCubistNetCubist
112
Figured out the issue. The tap interface needs an application tied to it. Once I start the openvpn service, the tap interface state transitions to "RUNNING"
– NetCubist
Feb 19 '14 at 7:00
If you figured it out, you should write an answer. It is perfectly fine to answer your own questions.
– Enno Gröper
Feb 19 '14 at 22:20
add a comment |
I am trying to hook up a virtual machine to a host using openvpn.
When i create a tap interface within the virtual machine using:
/usr/sbin/openvpn --mktun --dev tap1
The state of the tap interface is always "NO-CARRIER"
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether fa:16:3e:07:55:b5 brd ff:ff:ff:ff:ff:ff
inet 12.1.1.2/24 brd 12.1.1.255 scope global eth0
inet6 fe80::f816:3eff:fe07:55b5/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
3: br-ex: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
inet 10.10.100.2/24 scope global br-ex
inet6 fe80::3c23:adff:feb3:6d9d/64 scope link
valid_lft forever preferred_lft forever
8: tap1: <NO-CARRIER,BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 100
link/ether ce:e9:4a:1d:80:55 brd ff:ff:ff:ff:ff:ff
Any ideas why this could be happening?
I have checked to see the permissions of /dev/net/tun and it seems fine:
root@ip-10-66-210-99:~# ls -l /dev/net/tun
crw-rw-rw- 1 root root 10, 200 2014-02-15 07:15 /dev/net/tun
On the host itself there seems to be no issues.
What am i missing?
virtual-machines openvpn kvm-virtualization tap
asked Feb 18 '14 at 7:41
NetCubistNetCubist
112
I am trying to hook up a virtual machine to a host using openvpn.
When i create a tap interface within the virtual machine using:
/usr/sbin/openvpn --mktun --dev tap1
The state of the tap interface is always "NO-CARRIER"
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether fa:16:3e:07:55:b5 brd ff:ff:ff:ff:ff:ff
inet 12.1.1.2/24 brd 12.1.1.255 scope global eth0
inet6 fe80::f816:3eff:fe07:55b5/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
3: br-ex: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
inet 10.10.100.2/24 scope global br-ex
inet6 fe80::3c23:adff:feb3:6d9d/64 scope link
valid_lft forever preferred_lft forever
8: tap1: <NO-CARRIER,BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 100
link/ether ce:e9:4a:1d:80:55 brd ff:ff:ff:ff:ff:ff
Any ideas why this could be happening?
I have checked to see the permissions of /dev/net/tun and it seems fine:
root@ip-10-66-210-99:~# ls -l /dev/net/tun
crw-rw-rw- 1 root root 10, 200 2014-02-15 07:15 /dev/net/tun
On the host itself there seems to be no issues.
What am i missing?
virtual-machines openvpn kvm-virtualization tap
virtual-machines openvpn kvm-virtualization tap
asked Feb 18 '14 at 7:41
NetCubistNetCubist
112
asked Feb 18 '14 at 7:41
NetCubistNetCubist
112
asked Feb 18 '14 at 7:41
NetCubistNetCubist
112
asked Feb 18 '14 at 7:41
NetCubistNetCubist
112
asked Feb 18 '14 at 7:41
NetCubistNetCubist
112
112
Figured out the issue. The tap interface needs an application tied to it. Once I start the openvpn service, the tap interface state transitions to "RUNNING"
– NetCubist
Feb 19 '14 at 7:00
If you figured it out, you should write an answer. It is perfectly fine to answer your own questions.
– Enno Gröper
Feb 19 '14 at 22:20
add a comment |
Figured out the issue. The tap interface needs an application tied to it. Once I start the openvpn service, the tap interface state transitions to "RUNNING"
– NetCubist
Feb 19 '14 at 7:00
If you figured it out, you should write an answer. It is perfectly fine to answer your own questions.
– Enno Gröper
Feb 19 '14 at 22:20
Figured out the issue. The tap interface needs an application tied to it. Once I start the openvpn service, the tap interface state transitions to "RUNNING"
– NetCubist
Feb 19 '14 at 7:00
Figured out the issue. The tap interface needs an application tied to it. Once I start the openvpn service, the tap interface state transitions to "RUNNING"
– NetCubist
Feb 19 '14 at 7:00
If you figured it out, you should write an answer. It is perfectly fine to answer your own questions.
– Enno Gröper
Feb 19 '14 at 22:20
If you figured it out, you should write an answer. It is perfectly fine to answer your own questions.
– Enno Gröper
Feb 19 '14 at 22:20
add a comment |
1 Answer
1
active
oldest
votes
The issue it turns out was that the tap interface has to have an application associated with it for it to be in the "RUNNING" state.
Once i started the Openvpn service binding to tap0, the state moved to "RUNNING"
answered Feb 21 '14 at 5:36
NetCubistNetCubist
112
add a comment |
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The issue it turns out was that the tap interface has to have an application associated with it for it to be in the "RUNNING" state.
Once i started the Openvpn service binding to tap0, the state moved to "RUNNING"
answered Feb 21 '14 at 5:36
NetCubistNetCubist
112
add a comment |
The issue it turns out was that the tap interface has to have an application associated with it for it to be in the "RUNNING" state.
Once i started the Openvpn service binding to tap0, the state moved to "RUNNING"
answered Feb 21 '14 at 5:36
NetCubistNetCubist
112
add a comment |
The issue it turns out was that the tap interface has to have an application associated with it for it to be in the "RUNNING" state.
Once i started the Openvpn service binding to tap0, the state moved to "RUNNING"
answered Feb 21 '14 at 5:36
NetCubistNetCubist
112
The issue it turns out was that the tap interface has to have an application associated with it for it to be in the "RUNNING" state.
Once i started the Openvpn service binding to tap0, the state moved to "RUNNING"
answered Feb 21 '14 at 5:36
NetCubistNetCubist
112
answered Feb 21 '14 at 5:36
NetCubistNetCubist
112
answered Feb 21 '14 at 5:36
NetCubistNetCubist
112
answered Feb 21 '14 at 5:36
NetCubistNetCubist
112
112
add a comment |
add a comment |
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Figured out the issue. The tap interface needs an application tied to it. Once I start the openvpn service, the tap interface state transitions to "RUNNING"
– NetCubist
Feb 19 '14 at 7:00
If you figured it out, you should write an answer. It is perfectly fine to answer your own questions.
– Enno Gröper
Feb 19 '14 at 22:20