ifconfig shows UP while ip link shows DOWN
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8
I am looking at the state of an interface on a Linux system. When I use the ifconfig command it shows that the link is UP.
master $ ifconfig docker0
docker0 Link encap:Ethernet HWaddr 02:42:b9:25:be:2d
inet addr:172.18.0.1 Bcast:0.0.0.0 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
However, when I run the ip link command , it is down.
master $ ip link show docker0
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:b9:25:be:2d brd ff:ff:ff:ff:ff:ff
Can someone please explain?
networking linux-networking interface ifconfig
edited May 20 at 18:26
Anton Danilov
2,7222 gold badges7 silver badges14 bronze badges
asked May 20 at 8:38
automationcoachautomationcoach
442 bronze badges
add a comment |
8
I am looking at the state of an interface on a Linux system. When I use the ifconfig command it shows that the link is UP.
master $ ifconfig docker0
docker0 Link encap:Ethernet HWaddr 02:42:b9:25:be:2d
inet addr:172.18.0.1 Bcast:0.0.0.0 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
However, when I run the ip link command , it is down.
master $ ip link show docker0
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:b9:25:be:2d brd ff:ff:ff:ff:ff:ff
Can someone please explain?
networking linux-networking interface ifconfig
edited May 20 at 18:26
Anton Danilov
2,7222 gold badges7 silver badges14 bronze badges
asked May 20 at 8:38
automationcoachautomationcoach
442 bronze badges
4
This is normal, if you have no containers running on that network. It will change when you start a container. Alsoifconfigis 10 years obsolete, often displays wrong information, and should not be used anymore.
– Michael Hampton♦
May 20 at 19:21
@MichaelHampton Please don't answer the questions in the comment section. You can read about your commenting privileges here. Note that this information is also presented to you when you try to write a comment: Avoid answering questions in comments. Please be mindful that as a diamond moderator you set an example to other users.
– pipe
May 21 at 8:03
2
@pipe This comment does not suffice as an answer, which is why it is a comment. If you have further concerns, feel free to post on meta.
– Michael Hampton♦
May 21 at 8:19
add a comment |
8
8
8
I am looking at the state of an interface on a Linux system. When I use the ifconfig command it shows that the link is UP.
master $ ifconfig docker0
docker0 Link encap:Ethernet HWaddr 02:42:b9:25:be:2d
inet addr:172.18.0.1 Bcast:0.0.0.0 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
However, when I run the ip link command , it is down.
master $ ip link show docker0
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:b9:25:be:2d brd ff:ff:ff:ff:ff:ff
Can someone please explain?
networking linux-networking interface ifconfig
edited May 20 at 18:26
Anton Danilov
2,7222 gold badges7 silver badges14 bronze badges
asked May 20 at 8:38
automationcoachautomationcoach
442 bronze badges
I am looking at the state of an interface on a Linux system. When I use the ifconfig command it shows that the link is UP.
master $ ifconfig docker0
docker0 Link encap:Ethernet HWaddr 02:42:b9:25:be:2d
inet addr:172.18.0.1 Bcast:0.0.0.0 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
However, when I run the ip link command , it is down.
master $ ip link show docker0
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:b9:25:be:2d brd ff:ff:ff:ff:ff:ff
Can someone please explain?
networking linux-networking interface ifconfig
networking linux-networking interface ifconfig
edited May 20 at 18:26
Anton Danilov
2,7222 gold badges7 silver badges14 bronze badges
asked May 20 at 8:38
automationcoachautomationcoach
442 bronze badges
edited May 20 at 18:26
Anton Danilov
2,7222 gold badges7 silver badges14 bronze badges
asked May 20 at 8:38
automationcoachautomationcoach
442 bronze badges
edited May 20 at 18:26
Anton Danilov
2,7222 gold badges7 silver badges14 bronze badges
edited May 20 at 18:26
Anton Danilov
2,7222 gold badges7 silver badges14 bronze badges
edited May 20 at 18:26
Anton Danilov
2,7222 gold badges7 silver badges14 bronze badges
2,7222 gold badges7 silver badges14 bronze badges
asked May 20 at 8:38
automationcoachautomationcoach
442 bronze badges
asked May 20 at 8:38
automationcoachautomationcoach
442 bronze badges
asked May 20 at 8:38
automationcoachautomationcoach
442 bronze badges
442 bronze badges
4
This is normal, if you have no containers running on that network. It will change when you start a container. Alsoifconfigis 10 years obsolete, often displays wrong information, and should not be used anymore.
– Michael Hampton♦
May 20 at 19:21
@MichaelHampton Please don't answer the questions in the comment section. You can read about your commenting privileges here. Note that this information is also presented to you when you try to write a comment: Avoid answering questions in comments. Please be mindful that as a diamond moderator you set an example to other users.
– pipe
May 21 at 8:03
2
@pipe This comment does not suffice as an answer, which is why it is a comment. If you have further concerns, feel free to post on meta.
– Michael Hampton♦
May 21 at 8:19
add a comment |
4
This is normal, if you have no containers running on that network. It will change when you start a container. Alsoifconfigis 10 years obsolete, often displays wrong information, and should not be used anymore.
– Michael Hampton♦
May 20 at 19:21
@MichaelHampton Please don't answer the questions in the comment section. You can read about your commenting privileges here. Note that this information is also presented to you when you try to write a comment: Avoid answering questions in comments. Please be mindful that as a diamond moderator you set an example to other users.
– pipe
May 21 at 8:03
2
@pipe This comment does not suffice as an answer, which is why it is a comment. If you have further concerns, feel free to post on meta.
– Michael Hampton♦
May 21 at 8:19
4
4
This is normal, if you have no containers running on that network. It will change when you start a container. Also
ifconfig is 10 years obsolete, often displays wrong information, and should not be used anymore.– Michael Hampton♦
May 20 at 19:21
This is normal, if you have no containers running on that network. It will change when you start a container. Also
ifconfig is 10 years obsolete, often displays wrong information, and should not be used anymore.– Michael Hampton♦
May 20 at 19:21
@MichaelHampton Please don't answer the questions in the comment section. You can read about your commenting privileges here. Note that this information is also presented to you when you try to write a comment: Avoid answering questions in comments. Please be mindful that as a diamond moderator you set an example to other users.
– pipe
May 21 at 8:03
@MichaelHampton Please don't answer the questions in the comment section. You can read about your commenting privileges here. Note that this information is also presented to you when you try to write a comment: Avoid answering questions in comments. Please be mindful that as a diamond moderator you set an example to other users.
– pipe
May 21 at 8:03
2
2
@pipe This comment does not suffice as an answer, which is why it is a comment. If you have further concerns, feel free to post on meta.
– Michael Hampton♦
May 21 at 8:19
@pipe This comment does not suffice as an answer, which is why it is a comment. If you have further concerns, feel free to post on meta.
– Michael Hampton♦
May 21 at 8:19
add a comment |
1 Answer
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In the ifconfig UP flag means the administrative status, not link status. If you have 'link up', then RUNNING flag is present in the ifconfig output. Anyway, ifconfig is deprecated, use the ip tool.
In the ip tool link status is shown by flags LOWER_UP and NO-CARRIER.
answered May 20 at 10:04
Anton DanilovAnton Danilov
2,7222 gold badges7 silver badges14 bronze badges
add a comment |
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18
In the ifconfig UP flag means the administrative status, not link status. If you have 'link up', then RUNNING flag is present in the ifconfig output. Anyway, ifconfig is deprecated, use the ip tool.
In the ip tool link status is shown by flags LOWER_UP and NO-CARRIER.
answered May 20 at 10:04
Anton DanilovAnton Danilov
2,7222 gold badges7 silver badges14 bronze badges
add a comment |
18
In the ifconfig UP flag means the administrative status, not link status. If you have 'link up', then RUNNING flag is present in the ifconfig output. Anyway, ifconfig is deprecated, use the ip tool.
In the ip tool link status is shown by flags LOWER_UP and NO-CARRIER.
answered May 20 at 10:04
Anton DanilovAnton Danilov
2,7222 gold badges7 silver badges14 bronze badges
add a comment |
18
18
18
In the ifconfig UP flag means the administrative status, not link status. If you have 'link up', then RUNNING flag is present in the ifconfig output. Anyway, ifconfig is deprecated, use the ip tool.
In the ip tool link status is shown by flags LOWER_UP and NO-CARRIER.
answered May 20 at 10:04
Anton DanilovAnton Danilov
2,7222 gold badges7 silver badges14 bronze badges
In the ifconfig UP flag means the administrative status, not link status. If you have 'link up', then RUNNING flag is present in the ifconfig output. Anyway, ifconfig is deprecated, use the ip tool.
In the ip tool link status is shown by flags LOWER_UP and NO-CARRIER.
answered May 20 at 10:04
Anton DanilovAnton Danilov
2,7222 gold badges7 silver badges14 bronze badges
edited May 20 at 12:51
answered May 20 at 10:04
Anton DanilovAnton Danilov
2,7222 gold badges7 silver badges14 bronze badges
answered May 20 at 10:04
Anton DanilovAnton Danilov
2,7222 gold badges7 silver badges14 bronze badges
answered May 20 at 10:04
Anton DanilovAnton Danilov
2,7222 gold badges7 silver badges14 bronze badges
2,7222 gold badges7 silver badges14 bronze badges
add a comment |
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4
This is normal, if you have no containers running on that network. It will change when you start a container. Also
ifconfigis 10 years obsolete, often displays wrong information, and should not be used anymore.– Michael Hampton♦
May 20 at 19:21
@MichaelHampton Please don't answer the questions in the comment section. You can read about your commenting privileges here. Note that this information is also presented to you when you try to write a comment: Avoid answering questions in comments. Please be mindful that as a diamond moderator you set an example to other users.
– pipe
May 21 at 8:03
2
@pipe This comment does not suffice as an answer, which is why it is a comment. If you have further concerns, feel free to post on meta.
– Michael Hampton♦
May 21 at 8:19