Dear CentOS-Community,
we are facing the following issue:
A secondary ip address seems to be automatically added to a nic which
causes several issues in our setup.
This server is equipped with four nics which are currently in use:
# nmcli con show
NAME UUID TYPE DEVICE
eno2 cb6fcb54-be52-4ab6-8324-88091a0ea1a0 ethernet eno2
eno4 dbd95c24-1ed7-4292-8dba-3934bd1476a0 ethernet eno4
eno1 1e382037-fec9-493d-a4f2-ace7d73a1e7b ethernet eno1
eno3 bea2db0f-d366-4f1b-bec8-4fbfb3c0b6d2 ethernet eno3
enp5s0f0 23f56b9f-4625-471e-9ce4-6fe7b8832310 ethernet --
enp5s0f1 f25b9a10-1584-4233-89dd-2dda7c774f0d ethernet --
From time to time, a secondary ip-address is assigned to an interface
as show below:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
group default qlen 1000
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
3: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP
group default qlen 1000
link/ether 00:26:b9:78:87:d1 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.90/24 brd 192.168.1.255 scope global noprefixroute eno1
valid_lft forever preferred_lft forever
inet6 fe80::226:b9ff:fe78:87d1/64 scope link
valid_lft forever preferred_lft forever
4: eno2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP
group default qlen 1000
link/ether 00:26:b9:78:87:d3 brd ff:ff:ff:ff:ff:ff
inet 10.10.100.205/24 brd 10.10.100.255 scope global noprefixroute eno2
valid_lft forever preferred_lft forever
inet 10.10.100.72/24 brd 10.10.100.255 scope global secondary
dynamic eno2
valid_lft 56158sec preferred_lft 56158sec
inet6 fe80::226:b9ff:fe78:87d3/64 scope link
valid_lft forever preferred_lft forever
5: eno3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP
group default qlen 1000
link/ether 00:26:b9:78:87:d5 brd ff:ff:ff:ff:ff:ff
inet 192.168.4.11/24 brd 192.168.4.255 scope global noprefixroute eno3
valid_lft forever preferred_lft forever
inet6 fe80::e98b:e064:50d2:535d/64 scope link noprefixroute
valid_lft forever preferred_lft forever
6: eno4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP
group default qlen 1000
link/ether 00:26:b9:78:87:d7 brd ff:ff:ff:ff:ff:ff
inet 192.168.2.98/24 brd 192.168.2.255 scope global noprefixroute eno4
valid_lft forever preferred_lft forever
inet *192.168.137.223/24* brd 192.168.137.255 scope global dynamic
eno4 <<----- THIS IS UNWANTED
valid_lft 604778sec preferred_lft 604778sec
inet6 fe80::9257:5654:b211:8dea/64 scope link noprefixroute
valid_lft forever preferred_lft forever
7: enp5s0f0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel
state DOWN group default qlen 1000
link/ether 00:15:17:59:96:44 brd ff:ff:ff:ff:ff:ff
8: enp5s0f1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel
state DOWN group default qlen 1000
link/ether 00:15:17:59:96:45 brd ff:ff:ff:ff:ff:ff
11: wwp0s29f7u1i4: <POINTOPOINT,MULTICAST,NOARP> mtu 1500 qdisc noop
state DOWN group default qlen 1000
link/none
Furthermore, systemctl status NetworkManager says:
systemctl status NetworkManager
● NetworkManager.service - Network Manager
Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service;
enabled; vendor preset: enabled)
Active: active (running) since Mon 2020-09-21 17:25:21 CEST; 17h ago
Docs: man:NetworkManager(8)
Main PID: 1752062 (NetworkManager)
Tasks: 3 (limit: 204496)
Memory: 8.2M
CGroup: /system.slice/NetworkManager.service
└─1752062 /usr/sbin/NetworkManager --no-daemon
NetworkManager[1752062]: <info> [1600751941.1341] agent-manager:
agent[0047d0145168a5f3,:1.4726/nmcli-connect/0]: agent registered
NetworkManager[1752062]: <info> [1600751941.1360] device (eno4):
Activation: starting connection 'eno4'
(dbd95c24-1ed7-4292-8dba-3934bd1476a0)
NetworkManager[1752062]: <info> [1600751941.1361] audit:
op="connection-activate" uuid="dbd95c24-1ed7-4292-8dba-3934bd1476a0"
name="eno4" pid=31215>
NetworkManager[1752062]: <info> [1600751941.1363] device (eno4): state
change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
NetworkManager[1752062]: <info> [1600751941.1371] device (eno4): state
change: prepare -> config (reason 'none', sys-iface-state: 'managed')
NetworkManager[1752062]: <info> [1600751941.1523] device (eno4): state
change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
NetworkManager[1752062]: <info> [1600751941.1552] device (eno4): state
change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
NetworkManager[1752062]: <info> [1600751941.1582] device (eno4): state
change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
NetworkManager[1752062]: <info> [1600751941.1586] device (eno4): state
change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
NetworkManager[1752062]: <info> [1600751941.1637] device (eno4):
Activation: successful, device activated.
This behaviour is really! unwanted. What is the reason for this
behavior. Packages like
keepalived or ctdb are not installed on this machine.
Any help is appreciated how to figure out the reason for this behavior.
Thanks in advance.
Felix
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