Re: Creating a bridge

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On 8/14/23 18:54, Alex wrote:
I've just installed fedora38 over my previous fedora install but didn't
save my network config that included a bridge to allow for local IPs for my
virtual machines. Is there a network tool that I can use to create a bridge
so I can then use the bridge option with virt-manager to assign IPs to my
Win10 virtual machine?

I'm used to doing the old-school network-scripts/ifcfg-eth0 stuff by hand,
but realize that doesn't exist anymore.

Perhaps someone has a basic /etc/NetworkManager/system-connections bridge
config they could paste here to get me started or the proper nmcli commands
I need?

I suppose I could probably also use NAT, but I'd rather have my gateway
doing the NAT.

# ip addr
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state
DOWN group default qlen 1000
     link/ether 52:54:00:c8:a0:df brd ff:ff:ff:ff:ff:ff
     inet brd scope global virbr0
        valid_lft forever preferred_lft forever

Yet another use for "ip".

ip link add name virbr0 type bridge
ip link set virbr0 up
ip addr add virbr0

To manually add a port to the bridge:

ip link set ethX up
ip link set ethX master virbr0

To manually remove a port from the bridge:

ip link set ethX nomaster

Somewhere using your favorite firewalling tool you'll need to effect something like this:


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