in an HA environment( 3 controller node), normally,the DHCP agent works well, when I create an network for 192.168.1.0/24,
commonly, the ip for dhcp port will be 192.168.1.2/3/4.
but after some testcases, either by restart the HOST, or unplug the HOST networks ( I am not sure about the concrete reason),
the dhcp netns changes as below:
in general , a) the ip for tap device in the namespace changed. b) the 1st dhcp ns has one tap device, and 2nd has two tap device, and 3rd has three
in an HA environment( 3 controller node), normally,the DHCP agent works well, when I create an network for 192.168.1.0/24,
commonly, the ip for dhcp port will be 192.168.1.2/3/4.
but after some testcases, either by restart the HOST, or unplug the HOST networks ( I am not sure about the concrete reason),
the dhcp netns changes as below:
in general , a) the ip for tap device in the namespace changed. b) the 1st dhcp ns has one tap device, and 2nd has two tap device, and 3rd has three
------ ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ---
[root@controller1 ~]# ip netns exec qdhcp-dde8c382- 0660-41a8- bbcc-cdc7e0b8b2 0a ip a UP,LOWER_ UP> mtu 65536 qdisc noqueue state UNKNOWN MULTICAST, UP,LOWER_ UP> mtu 1500 qdisc noqueue state UNKNOWN 3eff:fe1f: 5799/64 scope link
1: lo: <LOOPBACK,
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
20: tap1ea190c7-d8: <BROADCAST,
link/ether fa:16:3e:1f:57:99 brd ff:ff:ff:ff:ff:ff
inet 192.168.207.184/24 brd 192.168.207.255 scope global tap1ea190c7-d8
valid_lft forever preferred_lft forever
inet 169.254.169.254/16 brd 169.254.255.255 scope global tap1ea190c7-d8
valid_lft forever preferred_lft forever
inet6 fe80::f816:
valid_lft forever preferred_lft forever
[root@controller2 ~]# ip netns exec qdhcp-dde8c382- 0660-41a8- bbcc-cdc7e0b8b2 0a ip a UP,LOWER_ UP> mtu 65536 qdisc noqueue state UNKNOWN MULTICAST, UP,LOWER_ UP> mtu 1500 qdisc noqueue state UNKNOWN 3eff:fe1f: 5799/64 scope link MULTICAST, UP,LOWER_ UP> mtu 1500 qdisc noqueue state UNKNOWN 3eff:fe1a: dd18/64 scope link
1: lo: <LOOPBACK,
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
14: tap1ea190c7-d8: <BROADCAST,
link/ether fa:16:3e:1f:57:99 brd ff:ff:ff:ff:ff:ff
inet 192.168.207.184/24 brd 192.168.207.255 scope global tap1ea190c7-d8
valid_lft forever preferred_lft forever
inet 169.254.169.254/16 brd 169.254.255.255 scope global tap1ea190c7-d8
valid_lft forever preferred_lft forever
inet6 fe80::f816:
valid_lft forever preferred_lft forever
129: tape6f6da9c-34: <BROADCAST,
link/ether fa:16:3e:1a:dd:18 brd ff:ff:ff:ff:ff:ff
inet 192.168.207.185/24 brd 192.168.207.255 scope global tape6f6da9c-34
valid_lft forever preferred_lft forever
inet 169.254.169.254/16 brd 169.254.255.255 scope global tape6f6da9c-34
valid_lft forever preferred_lft forever
inet6 fe80::f816:
valid_lft forever preferred_lft forever
[root@controller3 ~]# ip netns exec qdhcp-dde8c382- 0660-41a8- bbcc-cdc7e0b8b2 0a ip a UP,LOWER_ UP> mtu 65536 qdisc noqueue state UNKNOWN MULTICAST, UP,LOWER_ UP> mtu 1500 qdisc noqueue state UNKNOWN 3eff:fe1f: 5799/64 scope link MULTICAST, UP,LOWER_ UP> mtu 1500 qdisc noqueue state UNKNOWN 3eff:fe1a: dd18/64 scope link MULTICAST, UP,LOWER_ UP> mtu 1500 qdisc noqueue state UNKNOWN 3eff:fe5e: fe92/64 scope link
1: lo: <LOOPBACK,
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
14: tap1ea190c7-d8: <BROADCAST,
link/ether fa:16:3e:1f:57:99 brd ff:ff:ff:ff:ff:ff
inet 192.168.207.184/24 brd 192.168.207.255 scope global tap1ea190c7-d8
valid_lft forever preferred_lft forever
inet 169.254.169.254/16 brd 169.254.255.255 scope global tap1ea190c7-d8
valid_lft forever preferred_lft forever
inet6 fe80::f816:
valid_lft forever preferred_lft forever
17: tape6f6da9c-34: <BROADCAST,
link/ether fa:16:3e:1a:dd:18 brd ff:ff:ff:ff:ff:ff
inet 192.168.207.185/24 brd 192.168.207.255 scope global tape6f6da9c-34
valid_lft forever preferred_lft forever
inet 169.254.169.254/16 brd 169.254.255.255 scope global tape6f6da9c-34
valid_lft forever preferred_lft forever
inet6 fe80::f816:
valid_lft forever preferred_lft forever
141: tapf300a0aa-ae: <BROADCAST,
link/ether fa:16:3e:5e:fe:92 brd ff:ff:ff:ff:ff:ff
inet 192.168.207.186/24 brd 192.168.207.255 scope global tapf300a0aa-ae
valid_lft forever preferred_lft forever
inet 169.254.169.254/16 brd 169.254.255.255 scope global tapf300a0aa-ae
valid_lft forever preferred_lft forever
inet6 fe80::f816:
valid_lft forever preferred_lft forever