similar to: CentOS 7, systemd, NetworkMangler, oh, my

On 13 February 2017 at 15:35, <m.roth at 5-cent.us> wrote: > My manager tells me a system in the datacenter is down. I go down there, > and plug in a monitor-on-a-stick and keyboard. It's up, but no network. I > try systemctl restart NetworkManager several times, and ip a shows *no* > change. > > Finally, I do an ifdown, followed by an ifup, and everything's

Once upon a time, Lists <lists at benjamindsmith.com> said: > I understand that it's possible to allow the 4 VM guest systems to each have a > "direct" fixed IP address and access the addresses \via the host network > adapter, while the host retains its fixed IP. If you are running NetworkManager (the default), it's not too hard. Here's an example

On 13/02/17 15:35, m.roth wrote: > My manager tells me a system in the datacenter is down. I go down there, > and plug in a monitor-on-a-stick and keyboard. It's up, but no network. I > try systemctl restart NetworkManager several times, and ip a shows *no* > change. > > Finally, I do an ifdown, followed by an ifup, and everything's wonderful. > > My manager thinks

Odd situation: I've mentioned before that I have several users for whom I have to spoof the MAC address, due to a software license. Now, I've got net.ifnames=0 biosdevname=0 on the grub2 command line, and I've got the spoofed MAC address in /etc/sysconfig/network-sctipts/ifcfg-eth0. But he had a serious problem - X froze, and he thought to reboot, rather than call me. It came up with

On 5/19/2015 10:24 AM, James Hogarth wrote: > On 19 May 2015 11:40, <me at tdiehl.org> wrote: >> >> >> Or if you want a bigger hammer: >> >> systemctl disable NetworkManager.service >> systemctl enable network.service >> systemctl stop NetworkManager.service >> systemctl start network.service >> >> The above will disable

I have a physical host with a single physical network adapter. I want to host several VMs on host. (guest1 - guest4) The guest systems are accessible via 192.168.122.* as is the default with qemu/virsh. There are 4 IP addresses being routed to the primary interface on host. I can set up an alias for the NIC and "see" these ip addresses. I understand that it's possible to allow

Requirement is a very strong word , but you should consider using it and here is a short demo why: - By default, RHEL uses NetworkManager to configure and manage network connections, and the /usr/sbin/ifup and /usr/sbin/ifdown scripts use NetworkManager to process ifcfg files in the /etc/sysconfig/network-scripts/ directory. [root at system ~]# ls -l /usr/sbin/ifup lrwxrwxrwx. 1 root root 22 21

Have you tried to use NetworkManager ? After all ,anything network related should be done by it. [root at system ~]# nmcli connection add con-name dummy0 ifname dummy0 type dummy ? Connection 'dummy0' (9fdd74fa-c143-4991-9bac-0e542704ac89) successfully added. [root at system ~]# reboot Shared connection to glustera closed. [root at system ~]# uptime 03:23:44 up 0 min, ?1 user, ?load

No. Network Manager is always disabled on our builds since at least Cent5 days. The network stack has always been able to be managed properly without relying on Network Manager. Is that now an absolute requirement? It never has been prior. On Mon, Oct 26, 2020 at 6:26 PM Strahil Nikolov via CentOS <centos at centos.org> wrote: > > Have you tried to use NetworkManager ? > After

On Tue, Apr 21, 2015 at 03:46:52PM +0200, Dennis Jacobfeuerborn wrote: > Networking isn't really controlled by systemd but by NetworkManager. I > usually just yum remove NetworkManager* and then everything works just > as it did in CentOS 6. Note: NetworkManager is in CentOS6 too, and is part of the default workstation install. The NM in CentOS7 is a bit more polished than the NM

Gordon Messmer wrote: > On 02/13/2017 07:35 AM, m.roth at 5-cent.us wrote: >> Finally, I do an ifdown, followed by an ifup, and everything's >> wonderful. > > What's in /etc/sysconfig/network-scripts/ifcfg-<interface>? Does it say > NM_CONTROLLED=no? > Good catch. No, it doesn't say no... because the line was commented out. I've just uncommented it,

We've started having a problem with a CentOS 7 server. It looses its IPv6 address, if I understand this issue correctly. We can get in, if we do ssh -4, though. In the logs, I'm seeing this about twice an hour: <warn> (pid 98466) unhandled DHCP event for interface ens3f0 Now, in googling, I get very few hits putting quotes around "unhanded dhcp exception" - in fact, the

Hello all I am setting up a Centos 6 machine with one network card & one onboard network port. Both are recognized & work. Onboard Network port is unused yet, but is required for dedicated access to LTSP LAN, which would allow older PIII machines to boot from this system. I have installed LTSP but again Networking seems to be the problem area, as the clients won't boot from this

On 02/13/2017 07:35 AM, m.roth at 5-cent.us wrote: > Finally, I do an ifdown, followed by an ifup, and everything's wonderful. What's in /etc/sysconfig/network-scripts/ifcfg-<interface>? Does it say NM_CONTROLLED=no? > My manager thinks that the NM daemon thinks everything's fine, and > there've been no changes, so it does nothing. He suggests that it might >

On 07/07/16 05:36 PM, Digimer wrote: > On 07/07/16 05:21 PM, Joe Smithian wrote: >> Hi All, >> >> I see an unexpected beahviour from NetworkManager on CentOS 7.1. >> Using nmcli tool, I create a bond with two slaves as explained in the Red >> Hat 7.1 Networking guide. I enable slaves and master; bond works as >> expected. >> When I restart

Hi All, I see an unexpected beahviour from NetworkManager on CentOS 7.1. Using nmcli tool, I create a bond with two slaves as explained in the Red Hat 7.1 Networking guide. I enable slaves and master; bond works as expected. When I restart NetworkManager, it creates a new bond with the same name but not connected to any device. Two bonds with the same name is confusing for my other monitoring

Does Centos 7 use /etc/sysconfig/network or is this replaced by some systemctl set of commands. For example I know to set my host name with: hostnamectl set-hostname nevia.htt-consult.com But I don't know if this is the same as cat <<EOF>/etc/sysconfig/network || exit 1 NETWORKING=yes HOSTNAME=nevia.htt-consult.com EOF

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?????

Someone else got the 7 pxe install going, and one thing that's annoying is that NetworkMangler appears to be regularly trying to fire up the wifi. On a workstation, in a wired environment. I just want to tell NM to knock it off....It's Monday, and my searching isn't going too well. Clues for the poor? mark

We just got DELL R920 and installed Centos 6.5 on it.? After installation, network not function.? We manually enter IP address, gateway and netmark on "em1".? we also do following: 1. startup NetworkManager 2. /etc/sysconfig/network-scripts/ifcfg-em1? ==> NM_CONTROOLED=yes I tried to startup network and get error message: Bring up interface em1: connection activation failed