# Trouble with virt-manager: failed to find a suitable default network

**URL:** <https://forum.systemcrafters.net/t/trouble-with-virt-manager-failed-to-find-a-suitable-default-network/1906>\
**Category:** Guix\
**Created:** [February 26, 2026, 12:08pm UTC](https://forum.systemcrafters.net/t/trouble-with-virt-manager-failed-to-find-a-suitable-default-network/1906 "2026-02-26T12:08:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Folaht](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.systemcrafters.net/folaht/32/1145_2.png) [@Folaht](https://forum.systemcrafters.net/u/Folaht)\
**Post date:** [February 26, 2026, 12:08pm UTC](https://forum.systemcrafters.net/t/trouble-with-virt-manager-failed-to-find-a-suitable-default-network/1906/1 "2026-02-26T12:08:24Z")

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I managed to get virt-manager running with a KVM connection, but I’m stuck with network bridges. How does that work again?

 ![Capture d’écran_2026-02-26_13-06-57](https://canada1.discourse-cdn.com/flex029/uploads/systemcrafters/original/2X/1/11d7effc82c5323a498270526b5213d5d46e21d6.png)

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**Author:** ![Folaht](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.systemcrafters.net/folaht/32/1145_2.png) [@Folaht](https://forum.systemcrafters.net/u/Folaht)\
**Post date:** [March 2, 2026, 4:31am UTC](https://forum.systemcrafters.net/t/trouble-with-virt-manager-failed-to-find-a-suitable-default-network/1906/2 "2026-03-02T04:31:21Z")

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I’ve got virt-manager working by having done this..

```auto
$ guix package -i qemu virt-manager virt-viewer libvirt dnsmasq vde2 bridge-utils netcat-openbsd ebtables iptables

```

```scheme
...
(use-modules (gnu services virtualization))
...
(services
(append (list
...
(service libvirt-service-type (libvirt-configuration 
(tls-port "16514")
(unix-sock-group "libvirt")
(unix-sock-rw-perms) "0770"))
...
(service virtlog-service-type
(virtlog-configuration (max-clients 1000)))
...

```

`$ sudo virsh net-create /etc/lbivirt/storage/default.xml`

The only issue now is that I have to redo the last line during every restart.

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**Author:** ![dgr](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.systemcrafters.net/dgr/32/394_2.png) [@dgr](https://forum.systemcrafters.net/u/dgr)\
**Post date:** [March 2, 2026, 9:34am UTC](https://forum.systemcrafters.net/t/trouble-with-virt-manager-failed-to-find-a-suitable-default-network/1906/3 "2026-03-02T09:34:19Z")

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Maybe as in the `#guix` channel on libera.chat how to solve this but I guess a shepherd service would be the possible way to handle this.