GitHub user Sparc0 added a comment to the discussion: Mangement network does
not use defined vlan
I am a bit reluctant to share to much logs without doing a proper cleanup of
them first. I will share a few lines i was able to find myself below. If thats
not enough i will cleanup the logs.
Found this when it creates the vlan interfaces for my public network
```
2026-01-26 17:59:23,524 DEBUG [kvm.resource.BridgeVifDriver]
(AgentRequest-Handler-5:[]) (logid:d42c5695)
nic=[Nic:Management-10.100.100.49-vlan://3006]
2026-01-26 17:59:23,524 DEBUG [kvm.resource.BridgeVifDriver]
(AgentRequest-Handler-5:[]) (logid:d42c5695)
nic=[Nic:Public-100.10.10.253-vlan://214]
2026-01-26 17:59:23,524 DEBUG [kvm.resource.BridgeVifDriver]
(AgentRequest-Handler-5:[]) (logid:d42c5695) creating a vNet dev and bridge for
public traffic per traffic label cloudbr0
2026-01-26 17:59:23,525 DEBUG [kvm.resource.BridgeVifDriver]
(AgentRequest-Handler-5:[]) (logid:d42c5695) Executing command
[/usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvlan.sh -v 214 -p
bond0 -b brbond0-214 -o add ].
2026-01-26 17:59:23,581 DEBUG [kvm.resource.BridgeVifDriver]
(AgentRequest-Handler-5:[]) (logid:d42c5695) Successfully executed process
[2763106] for command
[/usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvlan.sh -v 214 -p
bond0 -b brbond0-214 -o add ]
```
I found that when it creates the instance the nic mapped to eth1 sets to
"broadcastType": "Native" while the other nic for eth2 is "broadcastType":
"Vlan".
```
[
{
"com.cloud.agent.api.StartAnswer": {
"vm": {
"id": "8327",
"name": "s-8327-VM",
"state": "Starting",
"type": "SecondaryStorageVm",
"cpus": "1",
"minSpeed": "500",
"maxSpeed": "500",
"minRam": "(512.00 MB) 536870912",
"maxRam": "(512.00 MB) 536870912",
"arch": "x86_64",
"os": "Debian GNU/Linux 12 (64-bit)",
"platformEmulator": "Debian GNU/Linux 12 (64-bit)",
"bootArgs": " template=domP type=secstorage host=redacted port=8250
name=s-8327-VM zone=1 pod=1 guid=s-8327-VM workers=5
authorized_key=ZWNkc2Etc2hhMi1uaXN0cDI1NiBBQUFBRTJWalpITmhMWE5vWVRJdGJtbHpkSEF5TlRZQUFBQUlibWx6ZEhBeU5UWUFBQ,
resource=com.cloud.storage.resource.PremiumSecondaryStorageResource
instance=SecStorage sslcopy=false role=templateProcessor mtu=1500
eth2ip=redacted eth2mask=255.255.255.128 gateway=redacted
public.network.device=eth2 eth0ip=169.254.176.240 eth0mask=255.255.0.0
eth1ip=redacted eth1mask=255.255.255.224 mgmtcidr=redacted /25 localgw=redacted
private.network.device=eth1 internaldns1=redacted internaldns2=redacted
dns1=redacted dns2=redacted ",
"enableHA": "false",
"limitCpuUse": "false",
"enableDynamicallyScaleVm": "false",
"vncAddr": "10.236.1.248",
"details": {},
"uuid": "8f0901ad-dd66-4656-8e33-3d2f23f8c8bc",
"enterHardwareSetup": "false",
"disks": [
{
"data": {
"org.apache.cloudstack.storage.to.VolumeObjectTO": {
"uuid": "f3d22203-bed4-408e-9a3e-0742706b79b1",
"volumeType": "ROOT",
"dataStore": {
"org.apache.cloudstack.storage.to.PrimaryDataStoreTO": {
"uuid": "fa992e2a-bb7f-37af-b3ba-c2e502bf9705",
"name": "cs_primary_replica3",
"id": "1",
"poolType": "RBD",
"host": "redacted ",
"path": "cs_primary_replica3",
"port": "0",
"url": "RBD://redacted
/cs_primary_replica3/?ROLE=Primary&STOREUUID=fa992e2a-bb7f-37af-b3ba-c2e502bf9705",
"isManaged": "false"
}
},
"name": "ROOT-8327",
"size": "(4.88 GB) 5242880000",
"path": "f3d22203-bed4-408e-9a3e-0742706b79b1",
"volumeId": "8211",
"vmName": "s-8327-VM",
"accountId": "1",
"format": "RAW",
"provisioningType": "THIN",
"poolId": "1",
"id": "8211",
"deviceId": "0",
"bytesReadRate": "(0 bytes) 0",
"bytesWriteRate": "(0 bytes) 0",
"iopsReadRate": "(0 bytes) 0",
"iopsWriteRate": "(0 bytes) 0",
"hypervisorType": "KVM",
"directDownload": "false",
"deployAsIs": "false",
"checkpointPaths": [],
"checkpointImageStoreUrls": [],
"followRedirects": "false"
}
},
"diskSeq": "0",
"path": "f3d22203-bed4-408e-9a3e-0742706b79b1",
"type": "ROOT",
"details": {
"storageHost": "redacted ",
"managed": "false",
"storagePort": "0",
"protocoltype": "RBD",
"storage.pool.disk.wait": "60",
"volumeSize": "(4.88 GB) 5242880000"
}
}
],
"nics": [
{
"deviceId": "2",
"networkRateMbps": "-1",
"defaultNic": "true",
"pxeDisable": "true",
"nicUuid": "228954a9-c63b-4e81-bf16-8843b6962897",
"details": {
"PromiscuousMode": "false",
"MacAddressChanges": "true",
"ForgedTransmits": "true",
"MacLearning": "false"
},
"dpdkEnabled": "false",
"networkId": "200",
"networkSegmentName": "D1-A1-Z1-S200",
"uuid": "0e7127d6-87b2-4bff-b1f4-0dba7351a5a1",
"ip": "redacted ",
"netmask": "255.255.255.128",
"gateway": "redacted ",
"mac": "1e:00:f3:00:00:1d",
"dns1": "redacted ",
"dns2": "redacted ",
"broadcastType": "Vlan",
"type": "Public",
"broadcastUri": "vlan://214",
"isolationUri": "vlan://214",
"securityGroupEnabled": "false",
"name": "cloudbr0"
},
{
"deviceId": "0",
"networkRateMbps": "-1",
"defaultNic": "false",
"pxeDisable": "true",
"nicUuid": "b296f915-1d2c-49f7-a876-aad69fb8ceaf",
"details": {
"PromiscuousMode": "false",
"MacAddressChanges": "true",
"ForgedTransmits": "true",
"MacLearning": "false"
},
"dpdkEnabled": "false",
"networkId": "202",
"networkSegmentName": "D1-A1-Z1-S202",
"uuid": "c49eb44c-96d0-47d1-9794-5a0500d63bdb",
"ip": "169.254.176.240",
"netmask": "255.255.0.0",
"gateway": "169.254.0.1",
"mac": "0e:00:a9:fe:b0:f0",
"broadcastType": "LinkLocal",
"type": "Control",
"securityGroupEnabled": "false"
},
{
"deviceId": "1",
"networkRateMbps": "-1",
"defaultNic": "false",
"pxeDisable": "true",
"nicUuid": "12ea2287-e8bd-47df-a02e-a544c36c6bbe",
"details": {
"PromiscuousMode": "false",
"MacAddressChanges": "true",
"ForgedTransmits": "true",
"MacLearning": "false"
},
"dpdkEnabled": "false",
"networkId": "201",
"networkSegmentName": "D1-A1-Z1-S201",
"uuid": "347f6355-aba8-42e9-a3bc-327b6b21e6c9",
"ip": "redacted ",
"netmask": "255.255.255.224",
"gateway": "redacted ",
"mac": "1e:00:04:00:00:2e",
"broadcastType": "Native",
"type": "Management",
"broadcastUri": "vlan://3006",
"securityGroupEnabled": "false",
"name": "cloudbr0"
}
],
"vcpuMaxLimit": "1",
"configDriveLocation": "SECONDARY",
"guestOsDetails": {},
"extraConfig": {},
"networkIdToNetworkNameMap": {},
"metadataManufacturer": "Apache Software Foundation",
"metadataProductName": "CloudStack KVM Hypervisor"
},
"result": "true",
"wait": "0",
"bypassHostMaintenance": "false"
}
},
{
"com.cloud.agent.api.check.CheckSshAnswer": {
"result": "true",
"wait": "0",
"bypassHostMaintenance": "false"
}
}
]
```
GitHub link:
https://github.com/apache/cloudstack/discussions/12521#discussioncomment-15609180
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