Garacesh Posted January 18, 2023 Posted January 18, 2023 (edited) Here's a real head-scratcher for you.. Our Hypervisors (Windows Server 2022 Datacentre, 21H2 20348.1487 build) have been experiencing weird network inconsistencies... but only on the Hyper-V SET interfaces. Each SET is 3 out of 6 available interfaces on the same VLAN. Both static addresses. Both have the same subnet mask, default gateway and DNS servers. Both have a similar, but different MAC address that match the vendor range. IPv6 is disabled on both SET interfaces and both have the domain.tld manually set in the DNS suffic for this connection: option of Advanced TCP/IP settings, with both Register this connection's addresses in DNS and Use this connection's DNS suffix in DNS registration ticked. Yet one of them works, and one of them doesn't. It isn't always this way, both were showing Public network until I started breaking the ports (see switch info below) on the switch to make sure the port-to-switch documentation was correct, after which Team A decided it was Domain and Team B still stays as-is even after doing the same to Team B's ports. I tried remaking the teams (hence the 2.0) with the following PowerShell commands, which didn't fix the issue new-vmswitch "TeamA 2.0" -NetAdapterName "SLOT 2 Port 1","SLOT 6 Port 1","SLOT 8 Port 1" -EnableEmbeddedTeaming $true -Notes "3 QLogic SLOT X Port 1 interfaces" new-vmswitch "TeamB 2.0" -NetAdapterName "SLOT 2 Port 2","SLOT 6 Port 2","SLOT 8 Port 2" -EnableEmbeddedTeaming $true -Notes "3 QLogic SLOT X Port 2 interfaces" All 6 ports on the switch it's connected to are configured identically. interface 1/1/[color="#FF0000"]x[/color] no shutdown description HypervisorHostname - Team [color="#FF0000"]X[/color] - S[color="#FF0000"]#[/color]P[color="#FF0000"]#[/color] no routing vlan trunk native 1 vlan trunk allowed [color="#FF0000"]##[/color],[color="#FF0000"]##[/color],[color="#FF0000"]##[/color],[color="#FF0000"]##[/color] Initially I thought oh, put the vlan trunk native to match the VLAN the servers are on! Nope, bricks the link. NlaSvc's event log (Event Viewer, Microsoft, Windows, NlaSvc, Operational) has the following events: Gateway resolution failed on interface {d54340f1-8e7b-4a97-b376-1c2adc94687c} for [color="#FF0000"]IP[/color].[color="#FF0000"]of[/color].[color="#FF0000"]Gateway[/color].[color="#FF0000"]254[/color] with error: 0x43 LDAP authentication on interface {D54340F1-8E7B-4A97-B376-1C2ADC94687C} ([color="#FF0000"]IP[/color].[color="#FF0000"]of[/color].[color="#FF0000"]Host[/color].[color="#FF0000"]Server[/color]) failed with error 0x51 Other random-but-possibly-relevant bits PS C:\Windows\system32> get-vmswitchteam "TeamA 2.0" | Select * Name : TeamA 2.0 Id : 49873dc8-fd70-437d-b7b8-151bd39c11a1 NetAdapterInterfaceDescription : {QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client) #5, QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client) #6, QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client) #3} NetAdapterInterfaceGuid : {96231111-35fa-489d-a212-6bc36b0210ce, 3cff025b-3118-484d-93d0-b4face212df5, c52107aa-bcaf-4cf0-902b-d8558b4718a1} TeamingMode : SwitchIndependent LoadBalancingAlgorithm : Dynamic PS C:\Windows\system32 > get-vmswitchteam "TeamB 2.0" | Select * Name : TeamB 2.0 Id : 33a363a6-e757-4b2f-87c1-9698b4517ddb NetAdapterInterfaceDescription : {QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client), QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client) #2, QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client) #4} NetAdapterInterfaceGuid : {821f55b6-e05c-4566-bc37-2213359e19bf, 6cd7e5f1-d711-43b4-8893-6b78df590e37, ec428132-cd24-44a9-8c2f-f878f61bc442} TeamingMode : SwitchIndependent LoadBalancingAlgorithm : Dynamic PS C:\Windows\system32> Get-VMSwitch -name "TeamA 2.0" | Select * DefaultQueueVmmqQueuePairs : 16 DefaultQueueVmmqQueuePairsRequested : 16 Name : TeamA 2.0 Id : 49873dc8-fd70-437d-b7b8-151bd39c11a1 Notes : 3 QLogic 'SLOT X Port 1' interfaces Extensions : {Microsoft Windows Filtering Platform, Microsoft NDIS Capture} BandwidthReservationMode : Absolute PacketDirectEnabled : False EmbeddedTeamingEnabled : True AllowNetLbfoTeams : False IovEnabled : False SwitchType : External AllowManagementOS : True NetAdapterInterfaceDescription : Teamed-Interface NetAdapterInterfaceDescriptions : {QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client) #5, QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client) #6, QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client) #3} NetAdapterInterfaceGuid : {96231111-35fa-489d-a212-6bc36b0210ce, 3cff025b-3118-484d-93d0-b4face212df5, c52107aa-bcaf-4cf0-902b-d8558b4718a1} IovSupport : False IovSupportReasons : {This network adapter does not support SR-IOV.} AvailableIPSecSA : 0 NumberIPSecSAAllocated : 0 AvailableVMQueues : 516096 NumberVmqAllocated : 10 IovQueuePairCount : 72 IovQueuePairsInUse : 13 IovVirtualFunctionCount : 0 IovVirtualFunctionsInUse : 0 PacketDirectInUse : False DefaultQueueVrssEnabledRequested : True DefaultQueueVrssEnabled : True DefaultQueueVmmqEnabledRequested : True DefaultQueueVmmqEnabled : False DefaultQueueVrssMaxQueuePairsRequested : 16 DefaultQueueVrssMaxQueuePairs : 16 DefaultQueueVrssMinQueuePairsRequested : 1 DefaultQueueVrssMinQueuePairs : 1 DefaultQueueVrssQueueSchedulingModeRequested : StaticVrss DefaultQueueVrssQueueSchedulingMode : StaticVrss DefaultQueueVrssExcludePrimaryProcessorRequested : False DefaultQueueVrssExcludePrimaryProcessor : False SoftwareRscEnabled : True RscOffloadEnabled : False BandwidthPercentage : 10 DefaultFlowMinimumBandwidthAbsolute : 300000000 DefaultFlowMinimumBandwidthWeight : 0 CimSession : CimSession: . ComputerName : [color="#FF0000"]HypervisorHostname[/color] IsDeleted : False PS C:\Windows\system32> Get-VMSwitch -name "TeamB 2.0" | Select * DefaultQueueVmmqQueuePairs : 16 DefaultQueueVmmqQueuePairsRequested : 16 Name : TeamB 2.0 Id : 33a363a6-e757-4b2f-87c1-9698b4517ddb Notes : 3 QLogic 'SLOT X Port 2' interfaces Extensions : {Microsoft Windows Filtering Platform, Microsoft NDIS Capture} BandwidthReservationMode : Absolute PacketDirectEnabled : False EmbeddedTeamingEnabled : True AllowNetLbfoTeams : False IovEnabled : False SwitchType : External AllowManagementOS : True NetAdapterInterfaceDescription : Teamed-Interface NetAdapterInterfaceDescriptions : {QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client), QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client) #2, QLogic BCM57810 10 Gigabit Ethernet (NDIS VBD Client) #4} NetAdapterInterfaceGuid : {821f55b6-e05c-4566-bc37-2213359e19bf, 6cd7e5f1-d711-43b4-8893-6b78df590e37, ec428132-cd24-44a9-8c2f-f878f61bc442} IovSupport : False IovSupportReasons : {This network adapter does not support SR-IOV.} AvailableIPSecSA : 0 NumberIPSecSAAllocated : 0 AvailableVMQueues : 516096 NumberVmqAllocated : 1 IovQueuePairCount : 72 IovQueuePairsInUse : 4 IovVirtualFunctionCount : 0 IovVirtualFunctionsInUse : 0 PacketDirectInUse : False DefaultQueueVrssEnabledRequested : True DefaultQueueVrssEnabled : True DefaultQueueVmmqEnabledRequested : True DefaultQueueVmmqEnabled : False DefaultQueueVrssMaxQueuePairsRequested : 16 DefaultQueueVrssMaxQueuePairs : 16 DefaultQueueVrssMinQueuePairsRequested : 1 DefaultQueueVrssMinQueuePairs : 1 DefaultQueueVrssQueueSchedulingModeRequested : StaticVrss DefaultQueueVrssQueueSchedulingMode : StaticVrss DefaultQueueVrssExcludePrimaryProcessorRequested : False DefaultQueueVrssExcludePrimaryProcessor : False SoftwareRscEnabled : True RscOffloadEnabled : False BandwidthPercentage : 3 DefaultFlowMinimumBandwidthAbsolute : 100000000[b][color="#FF0000"]*[/color][/b] DefaultFlowMinimumBandwidthWeight : 0 CimSession : CimSession: . ComputerName : [color="#FF0000"]HypervisorHostname[/color] IsDeleted : False * This was originally 300000000 until I brought it in line with TeamA just in case, but that didn't work Really can't get my head around this one. Short of rain dances and blood sacrifices, I'm out of ideas. Edited January 18, 2023 by Garacesh
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