Not possible to create L2 guest network without VLAN, mapped to cloudbr1

[danivogel90]

problem

Error Unable to convert network offering with specified id to network profile with

cmk create network name="L2 Guest No VLAN" displaytext="L2 Guest SVA" zoneid=$ZONE_ID networkofferingid=$NETOFF_ID physicalnetworkid=$PHNET_ID

Not possible to define the L2 guest network without VLAN.

versions

CloudStack 4.20.1.0
Ubuntu 24.04.2
Bridge configuration:

cloud0      8000.76c30d2f0eda   no      vnet0
                            vnet1
cloudbr0        8000.aa2581097bfd   no      eno3
                            vnet2
                            vnet3
                            vnet4
                            vnet5
cloudbr1        8000.86803b4ff344   no      eno2
cloudbr2        8000.6af97cf2fcad   no      eno1

The steps to reproduce the bug

debug-error.txt

1. updateZone - ok
2. create physicalnetwork - ok
3. add traffictype - ok
4. update physicalnetwork - ok
5. create networkoffering - ok
6. update networkoffering - ok
7. updateZone -ok
8. create network - Unable to convert network offering with specified id to network profile

export ZONE_ID=e4a7648a-2847-446d-b6da-43d6f132ab98
export PHNET_ID=fd410e72-d29b-43bb-8b8a-8ac760469594
export NETOFF_ID=34465e19-632e-4e9f-8a46-c79d79c1e758

cmk updateZone id=$ZONE_ID allocationstate=Disabled
cmk create physicalnetwork zoneid=$ZONE_ID name="SVANet" isolationmethods=None tags=net27
cmk add traffictype physicalnetworkid=$PHNET_ID traffictype=Guest kvmnetworklabel=cloudbr1
cmk update physicalnetwork id=$PHNET_ID state=Enabled
cmk create networkoffering name="L2 No VLAN" guestiptype=L2 supportedservices="" traffictype=Guest specifyvlan=false ispersistent=true tags=net27
cmk update networkoffering id=$NETOFF_ID state=Enabled
cmk updateZone id=$ZONE_ID allocationstate=Enabled
cmk create network name="L2 Guest No VLAN" displaytext="L2 Guest SVA" zoneid=$ZONE_ID networkofferingid=$NETOFF_ID physicalnetworkid=$PHNET_ID

What to do about it?

This will be the simplest network configuration for a typical native KVM environment. In our case, "flat" clusters and backup networks not routed. How can the problem be solved?

[boring-cyborg]

Thanks for opening your first issue here! Be sure to follow the issue template!

[rajujith]

@danivogel90 Have you configured the guest traffic type and a VLAN range in the physical network?

[danivogel90]

If I use a VLAN range, then it's possible to define the guest network.

• Define a L2 untagged guest network, map to cloudbr1 to access company NFS services #11161
  Then the question. Is this a possible configuration, map an untagged L2 guest network direct to cloudbr1?

[rajujith]

If I use a VLAN range, then it's possible to define the guest network.

* [Define a L2 untagged guest network, map to cloudbr1 to access company NFS services #11161](https://github.com/apache/cloudstack/discussions/11161)
  Then the question. Is this a possible configuration, map an untagged L2 guest network direct to cloudbr1?

You can use an offering with specifyvlan true and send the VLAN ID='untagged' and try.

[danivogel90]

Yes that's it. Now the L2 guest is untagged, now I understand.

Type
L2
Traffic type
Guest
Broadcast URI
vlan://untagged
Isolation URI
vlan://untagged

Bridge

brctl show
bridge name	bridge id		STP enabled	interfaces
cloud0		8000.76c30d2f0eda	no		vnet0
							vnet3
cloud1		8000.0ec20a3e3279	no		
cloudbr0		8000.aa2581097bfd	no		eno3
							vnet1
							vnet2
							vnet4
							vnet5
cloudbr1		8000.86803b4ff344	no		eno2
							vnet6
cloudbr2		8000.6af97cf2fcad	no		eno1

Thanks