Hi Felix > Dear Simon, > > every second IP-address is unwanted. We restarted eno4: > > nmcli con down eno4; nmcli con up eno4 > > and the second address vanishes. Then after a few ours, the second ip > address reappears. That's really interesting. Doesn't NetworkManager also store other settings in a different location, not the ifcfg files? I think it does so and you may have to check there. Also, don't forget that there could be other tools running on the host which fiddle with NetworkManager. That said, I usually don't use NetworkManager on my servers so I don't really know much about it. Hope some NM experts can help you more. Regards, Simon > > > This is the config-file of eno2: > > # cat ifcfg-eno2 > TYPE=Ethernet > PROXY_METHOD=none > BROWSER_ONLY=no > BOOTPROTO=none > DEFROUTE=yes > IPV4_FAILURE_FATAL=yes > IPV6INIT=no > IPV6_AUTOCONF=yes > IPV6_DEFROUTE=yes > IPV6_FAILURE_FATAL=no > IPV6_ADDR_GEN_MODE=stable-privacy > NAME=eno2 > UUID=cb6fcb54-be52-4ab6-8324-88091a0ea1a0 > DEVICE=eno2 > ONBOOT=yes > IPV6_PRIVACY=no > IPADDR=10.10.100.205 > PREFIX=24 > GATEWAY=10.10.100.254 > DNS1=10.10.100.1 > DNS2=10.10.100.2 > DOMAIN=ourDomain > > I am not aware of this setting: > > scope global secondary dynamic > > > So maybe you are able to find it in the nmcli output: > > # nmcli con edit eno2 > > ===| nmcli interactive connection editor |=== > > Editing existing '802-3-ethernet' connection: 'eno2' > > > nmcli> p > =============================================================================== > Connection profile details (eno2) > =============================================================================== > connection.id: eno2 > connection.uuid: cb6fcb54-be52-4ab6-8324-88091a0ea1a0 > connection.stable-id: -- > connection.type: 802-3-ethernet > connection.interface-name: eno2 > connection.autoconnect: yes > connection.autoconnect-priority: 0 > connection.autoconnect-retries: -1 (default) > connection.multi-connect: 0 (default) > connection.auth-retries: -1 > connection.timestamp: 1600780222 > connection.read-only: no > connection.permissions: -- > connection.zone: -- > connection.master: -- > connection.slave-type: -- > connection.autoconnect-slaves: -1 (default) > connection.secondaries: -- > connection.gateway-ping-timeout: 0 > connection.metered: unknown > connection.lldp: default > connection.mdns: -1 (default) > connection.llmnr: -1 (default) > connection.wait-device-timeout: -1 > ------------------------------------------------------------------------------- > 802-3-ethernet.port: -- > 802-3-ethernet.speed: 0 > 802-3-ethernet.duplex: -- > 802-3-ethernet.auto-negotiate: no > 802-3-ethernet.mac-address: -- > 802-3-ethernet.cloned-mac-address: -- > 802-3-ethernet.generate-mac-address-mask:-- > 802-3-ethernet.mac-address-blacklist: -- > 802-3-ethernet.mtu: auto > 802-3-ethernet.s390-subchannels: -- > 802-3-ethernet.s390-nettype: -- > 802-3-ethernet.s390-options: -- > 802-3-ethernet.wake-on-lan: default > 802-3-ethernet.wake-on-lan-password: -- > ------------------------------------------------------------------------------- > ipv4.method: manual > ipv4.dns: 10.10.100.1,10.10.100.2 > ipv4.dns-search: ourDomain > ipv4.dns-options: -- > ipv4.dns-priority: 0 > ipv4.addresses: 10.10.100.205/24 > ipv4.gateway: 10.10.100.254 > ipv4.routes: -- > ipv4.route-metric: -1 > ipv4.route-table: 0 (unspec) > ipv4.routing-rules: -- > ipv4.ignore-auto-routes: no > ipv4.ignore-auto-dns: no > ipv4.dhcp-client-id: -- > ipv4.dhcp-iaid: -- > ipv4.dhcp-timeout: 0 (default) > ipv4.dhcp-send-hostname: yes > ipv4.dhcp-hostname: -- > ipv4.dhcp-fqdn: -- > ipv4.dhcp-hostname-flags: 0x0 (none) > ipv4.never-default: no > ipv4.may-fail: no > ipv4.dad-timeout: -1 (default) > ------------------------------------------------------------------------------- > ipv6.method: ignore > ipv6.dns: -- > ipv6.dns-search: -- > ipv6.dns-options: -- > ipv6.dns-priority: 0 > ipv6.addresses: -- > ipv6.gateway: -- > ipv6.routes: -- > ipv6.route-metric: -1 > ipv6.route-table: 0 (unspec) > ipv6.routing-rules: -- > ipv6.ignore-auto-routes: no > ipv6.ignore-auto-dns: no > ipv6.never-default: no > ipv6.may-fail: yes > ipv6.ip6-privacy: 0 (disabled) > ipv6.addr-gen-mode: stable-privacy > ipv6.ra-timeout: 0 (default) > ipv6.dhcp-duid: -- > ipv6.dhcp-iaid: -- > ipv6.dhcp-timeout: 0 (default) > ipv6.dhcp-send-hostname: yes > ipv6.dhcp-hostname: -- > ipv6.dhcp-hostname-flags: 0x0 (none) > ipv6.token: -- > ------------------------------------------------------------------------------- > proxy.method: none > proxy.browser-only: no > proxy.pac-url: -- > proxy.pac-script: -- > ------------------------------------------------------------------------------- > nmcli> > > > Felix > > On 22/09/2020 14:35, Simon Matter wrote: >>> Dear Simon, >>> >>> >>>> And can you diff the config of eno1 and eno4. >>> # pwd >>> /etc/sysconfig/network-scripts >> Okay, nothing to find here. >> >> What about eno2, you also have two IP addresses there and even in the >> same >> subnet, is this wanted or not? Can the second address of eno2 be found >> in >> the ifcfg file? >> >> Both eno2 and eno4 have "scope global secondary dynamic" with the >> second >> address and it doesn't seem to come from the base configuration. >> >> Simon >> >>> # diff -u ifcfg-eno1 ifcfg-eno4 >>> --- ifcfg-eno1 2020-09-21 17:23:25.576672703 +0200 >>> +++ ifcfg-eno4 2020-09-22 07:18:43.160532532 +0200 >>> @@ -3,15 +3,20 @@ >>> BROWSER_ONLY=no >>> BOOTPROTO=none >>> DEFROUTE=no >>> -IPV4_FAILURE_FATAL=yes >>> -IPV6INIT=no >>> -IPV6_AUTOCONF=no >>> +IPV4_FAILURE_FATAL=no >>> +IPV6INIT=yes >>> +IPV6_AUTOCONF=yes >>> IPV6_DEFROUTE=no >>> IPV6_FAILURE_FATAL=no >>> IPV6_ADDR_GEN_MODE=stable-privacy >>> -NAME=eno1 >>> -UUID=1e382037-fec9-493d-a4f2-ace7d73a1e7b >>> -DEVICE=eno1 >>> +NAME=eno4 >>> +UUID=dbd95c24-1ed7-4292-8dba-3934bd1476a0 >>> +DEVICE=eno4 >>> ONBOOT=yes >>> -IPADDR=192.168.1.90 >>> +IPADDR=192.168.2.98 >>> PREFIX=24 >>> +DNS1=10.10.100.1 >>> +DNS2=10.10.100.2 >>> +#DNS3=8.8.8.8 >>> +PEERDNS=no >>> +PEERROUTES=no >>> >>>> Can you show the config of eno4? >>> # cat ifcfg-eno4 >>> TYPE=Ethernet >>> PROXY_METHOD=none >>> BROWSER_ONLY=no >>> BOOTPROTO=none >>> DEFROUTE=no >>> IPV4_FAILURE_FATAL=no >>> IPV6INIT=yes >>> IPV6_AUTOCONF=yes >>> IPV6_DEFROUTE=no >>> IPV6_FAILURE_FATAL=no >>> IPV6_ADDR_GEN_MODE=stable-privacy >>> NAME=eno4 >>> UUID=dbd95c24-1ed7-4292-8dba-3934bd1476a0 >>> DEVICE=eno4 >>> ONBOOT=yes >>> IPADDR=192.168.2.98 >>> PREFIX=24 >>> DNS1=10.10.100.1 >>> DNS2=10.10.100.2 >>> #DNS3=8.8.8.8 >>> PEERDNS=no >>> PEERROUTES=no >>> >>> Regards, >>> >>> Felix >>> >>> _______________________________________________ >>> CentOS mailing list >>> CentOS at centos.org >>> https://lists.centos.org/mailman/listinfo/centos >>> >> >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> https://lists.centos.org/mailman/listinfo/centos > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos >