Can't create network within subnet of host #25736
Description
Issue Description
I'm trying to add a network with the same subnet as the host. The containers are supposed to be in a vlan on a (vlan-aware) bridge on the host and within the same subnet as the host.
If I manually edit the network json file, I can get it to work without problem. IMHO the podman network create command should not fail as the (edited) configuration clearly works correctly.
Steps to reproduce the issue
Steps to reproduce the issue
podman network create --interface-name br -o vlan=5 --ipam-driver 'host-local' -o mode=unmanaged --gateway 172.16.1.1 --subnet=172.16.1.0/24 br5Describe the results you received
Error: subnet 172.16.1.0/24 is already used on the host or by another config
Describe the results you expected
Network creates with the specified subnet and gateway.
podman info output
host:
arch: amd64
buildahVersion: 1.39.3
cgroupControllers:
- cpuset
- cpu
- io
- memory
- hugetlb
- pids
- rdma
- misc
cgroupManager: systemd
cgroupVersion: v2
conmon:
package: conmon_2.1.12-4_amd64
path: /usr/bin/conmon
version: 'conmon version 2.1.12, commit: unknown'
cpuUtilization:
idlePercent: 92.05
systemPercent: 2.2
userPercent: 5.75
cpus: 8
databaseBackend: boltdb
distribution:
codename: trixie
distribution: debian
version: unknown
eventLogger: journald
freeLocks: 2046
hostname: podman1
idMappings:
gidmap: null
uidmap: null
kernel: 6.12.20-amd64
linkmode: dynamic
logDriver: journald
memFree: 21949050880
memTotal: 33451249664
networkBackend: netavark
networkBackendInfo:
backend: netavark
dns:
package: Unknown
package: netavark_1.14.0-2_amd64
path: /usr/lib/podman/netavark
version: netavark 1.14.0
ociRuntime:
name: crun
package: crun_1.21-1_amd64
path: /usr/bin/crun
version: |-
crun version 1.21
commit: 10269840aa07fb7e6b7e1acff6198692d8ff5c88
rundir: /run/user/0/crun
spec: 1.0.0
+SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +WASM:wasmedge +YAJL
os: linux
pasta:
executable: ""
package: ""
version: ""
remoteSocket:
exists: true
path: /run/podman/podman.sock
rootlessNetworkCmd: pasta
security:
apparmorEnabled: false
capabilities: CAP_CHOWN,CAP_DAC_OVERRIDE,CAP_FOWNER,CAP_FSETID,CAP_KILL,CAP_NET_BIND_SERVICE,CAP_SETFCAP,CAP_SETGID,CAP_SETPCAP,CAP_SETUID,CAP_SYS_CHROOT
rootless: false
seccompEnabled: true
seccompProfilePath: /usr/share/containers/seccomp.json
selinuxEnabled: false
serviceIsRemote: false
slirp4netns:
executable: /usr/bin/slirp4netns
package: slirp4netns_1.2.1-1+b1_amd64
version: |-
slirp4netns version 1.2.1
commit: 09e31e92fa3d2a1d3ca261adaeb012c8d75a8194
libslirp: 4.8.0
SLIRP_CONFIG_VERSION_MAX: 4
libseccomp: 2.6.0
swapFree: 7939854336
swapTotal: 8589930496
uptime: 0h 51m 0.00s
variant: ""
plugins:
authorization: null
log:
- k8s-file
- none
- passthrough
- journald
network:
- bridge
- macvlan
- ipvlan
volume:
- local
registries: {}
store:
configFile: /usr/share/containers/storage.conf
containerStore:
number: 2
paused: 0
running: 2
stopped: 0
graphDriverName: overlay
graphOptions:
overlay.mountopt: nodev
graphRoot: /var/lib/containers/storage
graphRootAllocated: 201786920960
graphRootUsed: 154039660544
graphStatus:
Backing Filesystem: extfs
Native Overlay Diff: "true"
Supports d_type: "true"
Supports shifting: "true"
Supports volatile: "true"
Using metacopy: "false"
imageCopyTmpDir: /var/tmp
imageStore:
number: 6
runRoot: /var/run/containers/storage
transientStore: false
volumePath: /var/lib/containers/storage/volumes
version:
APIVersion: 5.4.1
BuildOrigin: Debian
Built: 1742477809
BuiltTime: Thu Mar 20 14:36:49 2025
GitCommit: "
GoVersion: go1.24.1
Os: linux
OsArch: linux/amd64
Version: 5.4.1Podman in a container
No
Privileged Or Rootless
None
Upstream Latest Release
Yes
Additional environment details
No response
Additional information
No response