ubuntu 18.04: not releasing old IPs from DHCP
We're running ubuntu 18.04, with the following configuration of netplan:
network:
version: 2
renderer: networkd
ethernets:
ens3:
dhcp4: yes
Currently we're running into an issue with DHCP, seems old IPs are not being freed after assigning a new one:
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:1a:4a:X:Y:Z brd ff:ff:ff:ff:ff:ff
inet 10.X.Y.175/23 brd 10.X.Y.255 scope global ens3
valid_lft forever preferred_lft forever
inet 10.X.Y.201/23 brd 10.X.Y.255 scope global secondary dynamic ens3
valid_lft 3136sec preferred_lft 3136sec
inet 10.X.Y.168/23 brd 10.X.Y.255 scope global secondary ens3
valid_lft forever preferred_lft forever
inet6 fe80::21a:4aff:fe97:5f31/64 scope link
valid_lft forever preferred_lft forever
This is generating duplicated IP addresses as some IPs are being reused but not freed, generating to the users a lot of issues.
What is causing this behavior and how can it be solved?
networking 18.04 dhcp netplan
asked Oct 10 '18 at 12:56
nKnnKn
1163
add a comment |
We're running ubuntu 18.04, with the following configuration of netplan:
network:
version: 2
renderer: networkd
ethernets:
ens3:
dhcp4: yes
Currently we're running into an issue with DHCP, seems old IPs are not being freed after assigning a new one:
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:1a:4a:X:Y:Z brd ff:ff:ff:ff:ff:ff
inet 10.X.Y.175/23 brd 10.X.Y.255 scope global ens3
valid_lft forever preferred_lft forever
inet 10.X.Y.201/23 brd 10.X.Y.255 scope global secondary dynamic ens3
valid_lft 3136sec preferred_lft 3136sec
inet 10.X.Y.168/23 brd 10.X.Y.255 scope global secondary ens3
valid_lft forever preferred_lft forever
inet6 fe80::21a:4aff:fe97:5f31/64 scope link
valid_lft forever preferred_lft forever
This is generating duplicated IP addresses as some IPs are being reused but not freed, generating to the users a lot of issues.
What is causing this behavior and how can it be solved?
networking 18.04 dhcp netplan
asked Oct 10 '18 at 12:56
nKnnKn
1163
This is happening only on Ubuntu 18.04. We have thousands of VMs with other OSs like Ubuntu 14.04, CentOS, RedHat and it won't happen here.
– nKn
Oct 10 '18 at 13:13
add a comment |
We're running ubuntu 18.04, with the following configuration of netplan:
network:
version: 2
renderer: networkd
ethernets:
ens3:
dhcp4: yes
Currently we're running into an issue with DHCP, seems old IPs are not being freed after assigning a new one:
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:1a:4a:X:Y:Z brd ff:ff:ff:ff:ff:ff
inet 10.X.Y.175/23 brd 10.X.Y.255 scope global ens3
valid_lft forever preferred_lft forever
inet 10.X.Y.201/23 brd 10.X.Y.255 scope global secondary dynamic ens3
valid_lft 3136sec preferred_lft 3136sec
inet 10.X.Y.168/23 brd 10.X.Y.255 scope global secondary ens3
valid_lft forever preferred_lft forever
inet6 fe80::21a:4aff:fe97:5f31/64 scope link
valid_lft forever preferred_lft forever
This is generating duplicated IP addresses as some IPs are being reused but not freed, generating to the users a lot of issues.
What is causing this behavior and how can it be solved?
networking 18.04 dhcp netplan
asked Oct 10 '18 at 12:56
nKnnKn
1163
We're running ubuntu 18.04, with the following configuration of netplan:
network:
version: 2
renderer: networkd
ethernets:
ens3:
dhcp4: yes
Currently we're running into an issue with DHCP, seems old IPs are not being freed after assigning a new one:
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:1a:4a:X:Y:Z brd ff:ff:ff:ff:ff:ff
inet 10.X.Y.175/23 brd 10.X.Y.255 scope global ens3
valid_lft forever preferred_lft forever
inet 10.X.Y.201/23 brd 10.X.Y.255 scope global secondary dynamic ens3
valid_lft 3136sec preferred_lft 3136sec
inet 10.X.Y.168/23 brd 10.X.Y.255 scope global secondary ens3
valid_lft forever preferred_lft forever
inet6 fe80::21a:4aff:fe97:5f31/64 scope link
valid_lft forever preferred_lft forever
This is generating duplicated IP addresses as some IPs are being reused but not freed, generating to the users a lot of issues.
What is causing this behavior and how can it be solved?
networking 18.04 dhcp netplan
networking 18.04 dhcp netplan
asked Oct 10 '18 at 12:56
nKnnKn
1163
asked Oct 10 '18 at 12:56
nKnnKn
1163
edited Oct 10 '18 at 13:37
nKn
asked Oct 10 '18 at 12:56
nKnnKn
1163
asked Oct 10 '18 at 12:56
nKnnKn
1163
asked Oct 10 '18 at 12:56
nKnnKn
1163
1163
This is happening only on Ubuntu 18.04. We have thousands of VMs with other OSs like Ubuntu 14.04, CentOS, RedHat and it won't happen here.
– nKn
Oct 10 '18 at 13:13
add a comment |
This is happening only on Ubuntu 18.04. We have thousands of VMs with other OSs like Ubuntu 14.04, CentOS, RedHat and it won't happen here.
– nKn
Oct 10 '18 at 13:13
This is happening only on Ubuntu 18.04. We have thousands of VMs with other OSs like Ubuntu 14.04, CentOS, RedHat and it won't happen here.
– nKn
Oct 10 '18 at 13:13
This is happening only on Ubuntu 18.04. We have thousands of VMs with other OSs like Ubuntu 14.04, CentOS, RedHat and it won't happen here.
– nKn
Oct 10 '18 at 13:13
add a comment |
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This is happening only on Ubuntu 18.04. We have thousands of VMs with other OSs like Ubuntu 14.04, CentOS, RedHat and it won't happen here.
– nKn
Oct 10 '18 at 13:13