Thank you, I'll be trying this on a spare machine here before I try it in production. Carefully reading the directions, although I see where bridge-br0 is created, I don't see where bridge-slave-em1 is defined? On Tuesday, December 7, 2021 8:25:37 PM PST Chris Adams wrote: > Once upon a time, Lists <lists@xxxxxxxxxxxxxxxxxx> 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 step-by-step for changing an existing interface "em1" to > be a bridge "br0": > > > # Create a bridge interface > nmcli con add type bridge ifname br0 bridge.stp no > > # Copy all the IPv4/IPv6 config from an existing interface > nmcli con mod bridge-br0 $(nmcli -f > ipv4.method,ipv4.addresses,ipv4.gateway,ipv6.method,ipv6.addresses,ipv6.gat > eway con show em1 | grep -v -- -- | sed 's/: */ /') # -or- just set an IPv4 > address/gateway to known values > nmcli con mod bridge-br0 ipv4.method manual ipv4.address 10.1.1.2/24 > ipv4.gateway 10.1.1.1 ipv6.method ignore > > # Make a connection for the physical ethernet em1 to be part of the bridge > nmcli con add type ethernet ifname em1 master bridge-br0 > > # Switch from the "regular" em1 to the bridge > nmcli con down em1; nmcli con up bridge-br0; nmcli con up bridge-slave-em1 > > # Disable the original config > nmcli con mod em1 autoconnect 0 > > > Then you set your VMs to use the bridge - in the libvirt XML for > example, you'd have something like: > > <interface type='bridge'> > <mac address='52:54:00:12:34:56'/> > <source bridge='br0'/> > <model type='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> </interface> > > > Inside the VM, configure the interface just as if it was a physical system > on that subnet.
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