Check my DHCP lease?2019 Community Moderator ElectionForce dhcp client to get a new leaseDHCP configuration for iPXEHow to know DHCP options value on debian/ubuntu and other linuxTesting DHCP range; multiple addresses per interfaceHow to skip DHCP if no cable connected to ethernet in Debianreset of a ubiquiti networks power ap - no loveWhen no dhcp server answer, how can I force dhclient to use the static lease from dhclient.conf instead of a previous dhcp lease?dhcp not setting FQDN hostname on centos 7 (no NetworkManager)Ubuntu 16.04 not getting dhcp leaseDHCP server does not include NTP server addresses in the DHCP ACK message
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Check my DHCP lease?
2019 Community Moderator ElectionForce dhcp client to get a new leaseDHCP configuration for iPXEHow to know DHCP options value on debian/ubuntu and other linuxTesting DHCP range; multiple addresses per interfaceHow to skip DHCP if no cable connected to ethernet in Debianreset of a ubiquiti networks power ap - no loveWhen no dhcp server answer, how can I force dhclient to use the static lease from dhclient.conf instead of a previous dhcp lease?dhcp not setting FQDN hostname on centos 7 (no NetworkManager)Ubuntu 16.04 not getting dhcp leaseDHCP server does not include NTP server addresses in the DHCP ACK message
Is there a way to show my current (client) DHCP lease?
Or even better - retrieve all options/infos sent with DHCPACK?
networking dhcp dhclient
asked May 20 '16 at 22:30
madneonmadneon
6281616
add a comment |
Is there a way to show my current (client) DHCP lease?
Or even better - retrieve all options/infos sent with DHCPACK?
networking dhcp dhclient
asked May 20 '16 at 22:30
madneonmadneon
6281616
2
/var/lib/dhcp/dhclient.leases?
– heemayl
May 20 '16 at 22:49
@heemayl this file is empty in my case (Ubuntu 15.10), maybe because NetworkManager is acquiring dhcp lease (?)
– madneon
May 20 '16 at 23:03
ipconfig getpacket <ifname>oripconfig getv6packet <ifname>on Mac OS X.
– thrig
May 20 '16 at 23:21
@heemayl, Nope.No such file or directory
– Cerin
Nov 21 '17 at 21:46
@heemayl was correct for the directory. On Debian Stretch I found infos in "/var/lib/dhcp/dhclient.eth0.leases"
– Larsen
Nov 16 '18 at 11:58
add a comment |
Is there a way to show my current (client) DHCP lease?
Or even better - retrieve all options/infos sent with DHCPACK?
networking dhcp dhclient
asked May 20 '16 at 22:30
madneonmadneon
6281616
Is there a way to show my current (client) DHCP lease?
Or even better - retrieve all options/infos sent with DHCPACK?
networking dhcp dhclient
networking dhcp dhclient
asked May 20 '16 at 22:30
madneonmadneon
6281616
asked May 20 '16 at 22:30
madneonmadneon
6281616
edited May 20 '16 at 22:41
madneon
asked May 20 '16 at 22:30
madneonmadneon
6281616
asked May 20 '16 at 22:30
madneonmadneon
6281616
asked May 20 '16 at 22:30
madneonmadneon
6281616
6281616
2
/var/lib/dhcp/dhclient.leases?
– heemayl
May 20 '16 at 22:49
@heemayl this file is empty in my case (Ubuntu 15.10), maybe because NetworkManager is acquiring dhcp lease (?)
– madneon
May 20 '16 at 23:03
ipconfig getpacket <ifname>oripconfig getv6packet <ifname>on Mac OS X.
– thrig
May 20 '16 at 23:21
@heemayl, Nope.No such file or directory
– Cerin
Nov 21 '17 at 21:46
@heemayl was correct for the directory. On Debian Stretch I found infos in "/var/lib/dhcp/dhclient.eth0.leases"
– Larsen
Nov 16 '18 at 11:58
add a comment |
2
/var/lib/dhcp/dhclient.leases?
– heemayl
May 20 '16 at 22:49
@heemayl this file is empty in my case (Ubuntu 15.10), maybe because NetworkManager is acquiring dhcp lease (?)
– madneon
May 20 '16 at 23:03
ipconfig getpacket <ifname>oripconfig getv6packet <ifname>on Mac OS X.
– thrig
May 20 '16 at 23:21
@heemayl, Nope.No such file or directory
– Cerin
Nov 21 '17 at 21:46
@heemayl was correct for the directory. On Debian Stretch I found infos in "/var/lib/dhcp/dhclient.eth0.leases"
– Larsen
Nov 16 '18 at 11:58
2
2
/var/lib/dhcp/dhclient.leases?– heemayl
May 20 '16 at 22:49
/var/lib/dhcp/dhclient.leases?– heemayl
May 20 '16 at 22:49
@heemayl this file is empty in my case (Ubuntu 15.10), maybe because NetworkManager is acquiring dhcp lease (?)
– madneon
May 20 '16 at 23:03
@heemayl this file is empty in my case (Ubuntu 15.10), maybe because NetworkManager is acquiring dhcp lease (?)
– madneon
May 20 '16 at 23:03
ipconfig getpacket <ifname> or ipconfig getv6packet <ifname> on Mac OS X.– thrig
May 20 '16 at 23:21
ipconfig getpacket <ifname> or ipconfig getv6packet <ifname> on Mac OS X.– thrig
May 20 '16 at 23:21
@heemayl, Nope.
No such file or directory– Cerin
Nov 21 '17 at 21:46
@heemayl, Nope.
No such file or directory– Cerin
Nov 21 '17 at 21:46
@heemayl was correct for the directory. On Debian Stretch I found infos in "/var/lib/dhcp/dhclient.eth0.leases"
– Larsen
Nov 16 '18 at 11:58
@heemayl was correct for the directory. On Debian Stretch I found infos in "/var/lib/dhcp/dhclient.eth0.leases"
– Larsen
Nov 16 '18 at 11:58
add a comment |
4 Answers
4
active
oldest
votes
I used dhcpdump when I was testing DHCP. It will dump both sides of the DHCP transaction. If you leave it running it will log the options passed.
You may want to restart your DHCP client to see the initial negotiation. The renewal request should contain all the running configuration.
answered May 21 '16 at 1:47
BillThorBillThor
7,7231426
add a comment |
I'm not aware of a way to query this information on the client. If you are on the server you can see information on the client leases in /var/lib/dhcp/dhclient.leases. From the client the only way i know is:
sudo grep dhclient /var/log/syslog
Which should give you something like:
May 20 18:34:38 [machine_name] dhclient: DHCPREQUEST on eth0 to [DHCP_SERVER_IP] port 67
May 20 18:34:38 [machine_name] dhclient: DHCPACK from [DHCP_SERVER_IP]
May 20 18:34:38 [machine_name] dhclient: bound to [client_dhcp_ip] -- renewal in 1517 seconds.
answered May 20 '16 at 22:55
user1794469user1794469
1,6421923
add a comment |
depending on your distro, it should be located in /var/lib/dhcp under dhclient.interface.leases or /var/lib/dhclient.leases. you can also specify the path of your dhclient.leases file by passing -lf when starting dhclient.
answered May 20 '16 at 23:03
RDCortezRDCortez
213
@madeon it should be under/var/lib/dhcp/dhclient.interface.leases e.g /var/lib/dhcp/dhclient.eth0.leases
– RDCortez
May 20 '16 at 23:08
add a comment |
With NetworkManager use nmcli to query the DHCP status for your active connection (assuming one) with
nmcli -f ipv4.method con show "`nmcli -t -f NAME connection `"
Fot full DHCP information use -f DHCP4. Adjust for ipv6 as necessary.
answered yesterday
jnasjnas
1011
New contributor
jnas 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 |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
I used dhcpdump when I was testing DHCP. It will dump both sides of the DHCP transaction. If you leave it running it will log the options passed.
You may want to restart your DHCP client to see the initial negotiation. The renewal request should contain all the running configuration.
answered May 21 '16 at 1:47
BillThorBillThor
7,7231426
add a comment |
I used dhcpdump when I was testing DHCP. It will dump both sides of the DHCP transaction. If you leave it running it will log the options passed.
You may want to restart your DHCP client to see the initial negotiation. The renewal request should contain all the running configuration.
answered May 21 '16 at 1:47
BillThorBillThor
7,7231426
add a comment |
I used dhcpdump when I was testing DHCP. It will dump both sides of the DHCP transaction. If you leave it running it will log the options passed.
You may want to restart your DHCP client to see the initial negotiation. The renewal request should contain all the running configuration.
answered May 21 '16 at 1:47
BillThorBillThor
7,7231426
I used dhcpdump when I was testing DHCP. It will dump both sides of the DHCP transaction. If you leave it running it will log the options passed.
You may want to restart your DHCP client to see the initial negotiation. The renewal request should contain all the running configuration.
answered May 21 '16 at 1:47
BillThorBillThor
7,7231426
answered May 21 '16 at 1:47
BillThorBillThor
7,7231426
answered May 21 '16 at 1:47
BillThorBillThor
7,7231426
answered May 21 '16 at 1:47
BillThorBillThor
7,7231426
7,7231426
add a comment |
add a comment |
I'm not aware of a way to query this information on the client. If you are on the server you can see information on the client leases in /var/lib/dhcp/dhclient.leases. From the client the only way i know is:
sudo grep dhclient /var/log/syslog
Which should give you something like:
May 20 18:34:38 [machine_name] dhclient: DHCPREQUEST on eth0 to [DHCP_SERVER_IP] port 67
May 20 18:34:38 [machine_name] dhclient: DHCPACK from [DHCP_SERVER_IP]
May 20 18:34:38 [machine_name] dhclient: bound to [client_dhcp_ip] -- renewal in 1517 seconds.
answered May 20 '16 at 22:55
user1794469user1794469
1,6421923
add a comment |
I'm not aware of a way to query this information on the client. If you are on the server you can see information on the client leases in /var/lib/dhcp/dhclient.leases. From the client the only way i know is:
sudo grep dhclient /var/log/syslog
Which should give you something like:
May 20 18:34:38 [machine_name] dhclient: DHCPREQUEST on eth0 to [DHCP_SERVER_IP] port 67
May 20 18:34:38 [machine_name] dhclient: DHCPACK from [DHCP_SERVER_IP]
May 20 18:34:38 [machine_name] dhclient: bound to [client_dhcp_ip] -- renewal in 1517 seconds.
answered May 20 '16 at 22:55
user1794469user1794469
1,6421923
add a comment |
I'm not aware of a way to query this information on the client. If you are on the server you can see information on the client leases in /var/lib/dhcp/dhclient.leases. From the client the only way i know is:
sudo grep dhclient /var/log/syslog
Which should give you something like:
May 20 18:34:38 [machine_name] dhclient: DHCPREQUEST on eth0 to [DHCP_SERVER_IP] port 67
May 20 18:34:38 [machine_name] dhclient: DHCPACK from [DHCP_SERVER_IP]
May 20 18:34:38 [machine_name] dhclient: bound to [client_dhcp_ip] -- renewal in 1517 seconds.
answered May 20 '16 at 22:55
user1794469user1794469
1,6421923
I'm not aware of a way to query this information on the client. If you are on the server you can see information on the client leases in /var/lib/dhcp/dhclient.leases. From the client the only way i know is:
sudo grep dhclient /var/log/syslog
Which should give you something like:
May 20 18:34:38 [machine_name] dhclient: DHCPREQUEST on eth0 to [DHCP_SERVER_IP] port 67
May 20 18:34:38 [machine_name] dhclient: DHCPACK from [DHCP_SERVER_IP]
May 20 18:34:38 [machine_name] dhclient: bound to [client_dhcp_ip] -- renewal in 1517 seconds.
answered May 20 '16 at 22:55
user1794469user1794469
1,6421923
answered May 20 '16 at 22:55
user1794469user1794469
1,6421923
answered May 20 '16 at 22:55
user1794469user1794469
1,6421923
answered May 20 '16 at 22:55
user1794469user1794469
1,6421923
1,6421923
add a comment |
add a comment |
depending on your distro, it should be located in /var/lib/dhcp under dhclient.interface.leases or /var/lib/dhclient.leases. you can also specify the path of your dhclient.leases file by passing -lf when starting dhclient.
answered May 20 '16 at 23:03
RDCortezRDCortez
213
@madeon it should be under/var/lib/dhcp/dhclient.interface.leases e.g /var/lib/dhcp/dhclient.eth0.leases
– RDCortez
May 20 '16 at 23:08
add a comment |
depending on your distro, it should be located in /var/lib/dhcp under dhclient.interface.leases or /var/lib/dhclient.leases. you can also specify the path of your dhclient.leases file by passing -lf when starting dhclient.
answered May 20 '16 at 23:03
RDCortezRDCortez
213
@madeon it should be under/var/lib/dhcp/dhclient.interface.leases e.g /var/lib/dhcp/dhclient.eth0.leases
– RDCortez
May 20 '16 at 23:08
add a comment |
depending on your distro, it should be located in /var/lib/dhcp under dhclient.interface.leases or /var/lib/dhclient.leases. you can also specify the path of your dhclient.leases file by passing -lf when starting dhclient.
answered May 20 '16 at 23:03
RDCortezRDCortez
213
depending on your distro, it should be located in /var/lib/dhcp under dhclient.interface.leases or /var/lib/dhclient.leases. you can also specify the path of your dhclient.leases file by passing -lf when starting dhclient.
answered May 20 '16 at 23:03
RDCortezRDCortez
213
answered May 20 '16 at 23:03
RDCortezRDCortez
213
answered May 20 '16 at 23:03
RDCortezRDCortez
213
answered May 20 '16 at 23:03
RDCortezRDCortez
213
213
@madeon it should be under/var/lib/dhcp/dhclient.interface.leases e.g /var/lib/dhcp/dhclient.eth0.leases
– RDCortez
May 20 '16 at 23:08
add a comment |
@madeon it should be under/var/lib/dhcp/dhclient.interface.leases e.g /var/lib/dhcp/dhclient.eth0.leases
– RDCortez
May 20 '16 at 23:08
@madeon it should be under
/var/lib/dhcp/dhclient.interface.leases e.g /var/lib/dhcp/dhclient.eth0.leases– RDCortez
May 20 '16 at 23:08
@madeon it should be under
/var/lib/dhcp/dhclient.interface.leases e.g /var/lib/dhcp/dhclient.eth0.leases– RDCortez
May 20 '16 at 23:08
add a comment |
With NetworkManager use nmcli to query the DHCP status for your active connection (assuming one) with
nmcli -f ipv4.method con show "`nmcli -t -f NAME connection `"
Fot full DHCP information use -f DHCP4. Adjust for ipv6 as necessary.
answered yesterday
jnasjnas
1011
New contributor
jnas 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 |
With NetworkManager use nmcli to query the DHCP status for your active connection (assuming one) with
nmcli -f ipv4.method con show "`nmcli -t -f NAME connection `"
Fot full DHCP information use -f DHCP4. Adjust for ipv6 as necessary.
answered yesterday
jnasjnas
1011
New contributor
jnas 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 |
With NetworkManager use nmcli to query the DHCP status for your active connection (assuming one) with
nmcli -f ipv4.method con show "`nmcli -t -f NAME connection `"
Fot full DHCP information use -f DHCP4. Adjust for ipv6 as necessary.
answered yesterday
jnasjnas
1011
New contributor
jnas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
With NetworkManager use nmcli to query the DHCP status for your active connection (assuming one) with
nmcli -f ipv4.method con show "`nmcli -t -f NAME connection `"
Fot full DHCP information use -f DHCP4. Adjust for ipv6 as necessary.
answered yesterday
jnasjnas
1011
New contributor
jnas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered yesterday
jnasjnas
1011
New contributor
jnas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered yesterday
jnasjnas
1011
answered yesterday
jnasjnas
1011
1011
New contributor
jnas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
jnas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
jnas 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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2
/var/lib/dhcp/dhclient.leases?– heemayl
May 20 '16 at 22:49
@heemayl this file is empty in my case (Ubuntu 15.10), maybe because NetworkManager is acquiring dhcp lease (?)
– madneon
May 20 '16 at 23:03
ipconfig getpacket <ifname>oripconfig getv6packet <ifname>on Mac OS X.– thrig
May 20 '16 at 23:21
@heemayl, Nope.
No such file or directory– Cerin
Nov 21 '17 at 21:46
@heemayl was correct for the directory. On Debian Stretch I found infos in "/var/lib/dhcp/dhclient.eth0.leases"
– Larsen
Nov 16 '18 at 11:58