Error VERR_INTNET_FLT_IF_NOT_FOUND when using more than one host-only network adapter

[Keith Berger]

I have Virtual box Version 5.0.14. I also tried 5.0.15 r105294. This has happened with all releases of 5.0. I am on Windows 8.1 Enterprise

I have two host-only adapters. both have the NDIS6 box checked. They show up when you query them

C:\Program Files\Oracle\VirtualBox>VBoxManage.exe list hostonlyifs
Name: VirtualBox Host-Only Ethernet Adapter #2
GUID: 7909bbce-7b21-4339-a458-8427ee763beb
DHCP: Disabled
IPAddress: 192.168.99.1
NetworkMask: 255.255.255.0
IPV6Address: fe80:0000:0000:0000:3cd7:cadd:cb89:6e15
IPV6NetworkMaskPrefixLength: 64
HardwareAddress: 0a:00:27:00:00:00
MediumType: Ethernet
Status: Up
VBoxNetworkName: HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter #2

Name: VirtualBox Host-Only Ethernet Adapter
GUID: 253c52b4-60e2-4ab4-a050-e9cc6d6f27b7
DHCP: Disabled
IPAddress: 192.168.245.1
NetworkMask: 255.255.255.0
IPV6Address: fe80:0000:0000:0000:41c3:c24f:2466:fb6d
IPV6NetworkMaskPrefixLength: 64
HardwareAddress: 0a:00:27:00:00:00
MediumType: Ethernet
Status: Up
VBoxNetworkName: HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter

the problem is if you try and launch a VM with both of them attached (like docker toolbox) you get the following errors.

Failed to open/create the internal network 'HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter #2' (VERR_INTNET_FLT_IF_NOT_FOUND). Failed to attach the network LUN (VERR_INTNET_FLT_IF_NOT_FOUND).

Result Code: E_FAIL (0x80004005) Component: ConsoleWrap Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

00:00:02.937132 IntNet#0: szNetwork={HostInterfaceNetworking-Intel(R) Ethernet Connection I217-LM} enmTrunkType=3 szTrunk={\DEVICE\{0AF7C152-73C0-4EB2-BB16-C9647DB2E7AA}} fFlags=0x8000 cbRecv=325632 cbSend=196608 fIgnoreConnectFailure=false
00:00:02.937775 IntNet#1: szNetwork={HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter} enmTrunkType=3 szTrunk={\DEVICE\{253C52B4-60E2-4AB4-A050-E9CC6D6F27B7}} fFlags=0x8000 cbRecv=325632 cbSend=196608 fIgnoreConnectFailure=false
00:00:02.938241 IntNet#2: szNetwork={HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter #2} enmTrunkType=3 szTrunk={\DEVICE\{7909BBCE-7B21-4339-A458-8427EE763BEB}} fFlags=0x8000 cbRecv=325632 cbSend=196608 fIgnoreConnectFailure=false
00:00:02.938312 VMSetError: F:\tinderbox\win-5.0\src\VBox\Devices\Network\DrvIntNet.cpp(1753) int cdecl drvR3IntNetConstruct(struct PDMDRVINS *,struct CFGMNODE *,unsigned int); rc=VERR_INTNET_FLT_IF_NOT_FOUND
00:00:02.938331 VMSetError: Failed to open/create the internal network 'HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter #2'
00:00:02.938384 VMSetError: F:\tinderbox\win-5.0\src\VBox\Devices\Network\DevE1000.cpp(7715) int cdecl e1kR3Construct(struct PDMDEVINS *,int,struct CFGMNODE *); rc=VERR_INTNET_FLT_IF_NOT_FOUND 
00:00:02.938387 VMSetError: Failed to attach the network LUN
00:00:02.938416 PDM: Failed to construct 'e1000'/2! VERR_INTNET_FLT_IF_NOT_FOUND (-3600) - The networking interface to filter was not found.
00:00:03.075713 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={872da645-4a9b-1727-bee2-5585105b9eed} aComponent={ConsoleWrap} aText={Failed to open/create the internal network 'HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter #2' (VERR_INTNET_FLT_IF_NOT_FOUND).
00:00:03.075744 Failed to attach the network LUN (VERR_INTNET_FLT_IF_NOT_FOUND)}, preserve=false aResultDetail=0
00:00:03.076318 Console: Machine state changed to 'PoweredOff'
00:00:03.088381 Power up failed (vrc=VERR_INTNET_FLT_IF_NOT_FOUND, rc=E_FAIL (0X80004005)) 
00:00:03.235545 GUI: UIMachineViewNormal::resendSizeHint: Restoring guest size-hint for screen 0 to 800x600
00:00:03.235721 ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={7303a66d-433b-25a4-f9a8-fcadf87e0c2a} aComponent={DisplayWrap} aText={The console is not powered up}, preserve=false aResultDetail=0

If you only use one attached, the VM's start without error.

[Aleksey Ilyushin]

Could you install the latest test build from here and run the following command?

VBoxBugReport <name of VM with both adapters attached>

Then mail the resulting archive to me via aleksey dot ilyushin at oracle dot com?