Hello, I'm new to the list; I am working on moving an application to Centos
Stream 9 running inside an openstack cloud virtual guest. I have
created:/etc/NetworkManager/conf.d/90-dns-none.conf:[main]dns=noneto prevent
Network Manager from overwriting the /etc/resolv.conf with incorrect DNS server
entries from our DHCP service. This is working.
I also need to tell Network Manager to override the MTU provided by the DHCP
service (which is telling my interfaces to use mtu=9000). I have
created:/etc/NetworkManager/conf.d/91-mtu-none.conf:[connection]match-device=interface-name:eth0ethernet.mtu=0
then: systemctl reload NetworkManager
I can then: nmcli device modify eth0 ethernet.mtu 1500 and it changes the mtu
to 1500 (shown in: ip address show). However, when I reboot, it changes back
to mtu 9000.
ifcfg-eth0 file still contains MTU=9000
Can someone provide some guidance on how this should work please?
regards,Stephen
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