List of Network Related Hotfixes Post RTM for Windows 8.1 and Windows Server 2012 R2
Applies to Windows Server 2012 R2
Originally published Jul. 2014. Updated Jul. 2014.
These updates and hotfixes can help avoid some known issues and may save you a support call.
**
A hotfix is intended to correct only the problem that is described in the article. You should not apply the hotfix if you have not seen the symptoms.
http://i.technet.microsoft.com/ff394763.note%28en-us,WS.10%29.gifNote: A catch 22, do you install it to try preventing the problem from occurring or do you only install it if you see the problem and have an outage?
http://i.technet.microsoft.com/ff394763.note%28en-us,WS.10%29.gifNote: Some updates are required only under certain circumstances**
Note: You should check http://support.microsoft.com/ 
for the latest version of the different files.
Note 2: These are not available in Windows Update.
Note 3: You can download them without entering your e-mail address and captcha if you are a Microsoft Premier customer and have a http://premier.microsoft.com/ account.
Note 4: Carefully review the list and decide which might be applicable to your unique environment.
Note 5: Test in your test and your quality assurance environment.
List of Network related hotfixes post RTM for Windows 8.1 and Windows Server 2012 R2:
2934842 The range of ports is not displayed when a Windows Firewall rule defines a local port range
http://support.microsoft.com/kb/2934842
Update(s):
Microsoft.grouppolicy.reporting.dll
Supersede(s):
2917033 An update is available to enable the use of Local ADMX files for Group Policy Editor
2866345 "AD / SYSVOL version mismatch" message is displayed unexpectedly in the Group Policy Results report in Windows
2936341 The WebClient service does not send cookies in Windows
http://support.microsoft.com/kb/2936341
Update(s):
Davclnt.dll
Webclnt.dll
2966087 You intermittently cannot connect to the DirectAccess server by using the IP-HTTPS adapter in Windows 8.1 and Windows Server 2012 R2
http://support.microsoft.com/kb/2966087
Update(s):
Netcfgx.dll
Supersede(s):
2965739 NICs disappear and vSwitch becomes private in Windows Server 2012 R2
2918550 Computer leaks nonpaged pool memory when IPSEC traffic is configured to use AuthIP without encryption in Windows
http://support.microsoft.com/kb/2918550
and
2905412 Stop error 0xD1 on a Windows-based computer with multiple processors
http://support.microsoft.com/kb/2905412
Update(s):
Netio.sys
Fwpkclnt.sys
Tcpip.sys
Supersede(s):
2896146 Packet loss occurs when MTU is below 576 and PMTU discovery is enabled in Windows
2888049 Update is available that improves the network performance of Internet Explorer 11 in Windows
2905407 Stop error 0xD1 when you download uTorrent content through an RNDIS 6.0 connection
http://support.microsoft.com/kb/2905407
Update(s):
Rndismp6.sys
Rndismpx.sys
Usb80236.sys
Usb8023x.sys
2972251 Event 1002 when system file information folder is shared in Windows 8.1 or Windows Server 2012 R2
http://support.microsoft.com/kb/2972251
Update(s):
Srv2.sys
Supersede(s):
2969039 0x7E Stop error occurs randomly when you close SMB sessions in Windows 8.1 or Windows Server 2012 R2
2955808 A VPN connection through a third-party VPN server disconnects after an hour on a computer that is running Windows 8.1 or Windows 8
http://support.microsoft.com/kb/2955808
Update(s):
Bfe.dll
Fwpuclnt.dll
Ikeext.dll
Networksecurity-ppdlic.xrm-ms
Nshwfp.dll
Wfp.mof
Fwpuclnt.dll
Nshwfp.dll
Wfp.mof
2936341 The WebClient service does not send cookies in Windows
http://support.microsoft.com/kb/2936341
Update(s):
Webclnt.dll
2965740 0x000000D6 Stop error when a VM network adapter is uninstalled in Windows 8.1 or Windows Server 2012 R2
http://support.microsoft.com/kb/2965740
Update(s):
Ndis.sys
Ndismigplugin.dll
Ndistrace.mof
2965735 The CA Ping tool always fails for IPv6 addresses in Windows Server 2012 R2
http://support.microsoft.com/kb/2965735
Update(s):
Vmsif.dll
Vmsnetsetupplugin.dll
Vmswitch.sys
Vmsif.dll
Vmsntfy.dll
Vmswitch.sys
Mslbfoprovider.sys
Wnv.sys
Wnvapi.dll
Vmsif.dll
Vmsntfy.dll
Vmswitch.sys
Vmsif.dll
Vmsntfy.dll
Vmswitch.sys
Supersede(s):
2965733 The guest cluster is not available to service users after failover in a Hyper-V Network Virtualization environment
2956241 Network communication is very slow in a virtual machine that has the LSO feature of Hyper-V Network Virtualization enabled
2913659 Windows Server 2012 R2-based Hyper-V server crashes when network traffic passes through a virtual switch
2902821 A virtual machine that is configured to use the DLC protocol does not connect to an SNA host on Hyper-V Server 2012 or Hyper-V Server 2012 R2
2965178 VMQs cannot be created or the NVGRE offloads incorrectly on a Windows 8.1 or Windows Server 2012 R2-based Hyper-V host
http://support.microsoft.com/kb/2965178
Update(s):
Msft_netlbfoteam.cdxml
Msft_netlbfoteam.format.ps1xml
Msft_netlbfoteammember.cdxml
Msft_netlbfoteammember.format.ps1xml
Msft_netlbfoteamnic.cdxml
Msft_netlbfoteamnic.format.ps1xml
Msft_netswitchteam.cdxml
Msft_netswitchteam.format.ps1xml
Msft_netswitchteammember.cdxml
Msft_netswitchteammember.format.ps1xml
Msnetimplatform.mof
Ndisimplatcim.dll
Ndisimplatform.dll
Ndisimplatform.sys
Netlbfo.psd1
Netlbfo.types.ps1xml
Netswitchteam.mof
Netswitchteam.psd1
Netswitchteamcim.dll
Mslbfoprovider.sys
Msft_netlbfoteam.cdxml
Msft_netlbfoteam.format.ps1xml
Msft_netlbfoteammember.cdxml
Msft_netlbfoteammember.format.ps1xml
Msft_netlbfoteamnic.cdxml
Msft_netlbfoteamnic.format.ps1xml
Msft_netswitchteam.cdxml
Msft_netswitchteam.format.ps1xml
Msft_netswitchteammember.cdxml
Msft_netswitchteammember.format.ps1xml
Netlbfo.psd1
Netlbfo.types.ps1xml
Netswitchteam.psd1
Supersede(s):
2953202 Network connectivity problem when Windows Server 2012 R2 is configured to use LBFO on a NIC teaming network adapter
2928360 Transferring files by using SMB2 or SMB3 causes memory leak on a Windows computer
http://support.microsoft.com/kb/2928360
Update(s):
Mrxsmb.sys
Supersede(s):
2885978 0x0000007F Stop error on a Windows-based computer
2888049 Update is available that improves the network performance of Internet Explorer 11 in Windows
http://support.microsoft.com/kb/2888049
Update(s):
Mswsock.dll
2935389 System shows a high nonpaged pool utilization from pool tag AfdP
http://support.microsoft.com/kb/2935389
Update(s):
Afd.sys
Supersede(s):
2888049 Update is available that improves the network performance of Internet Explorer 11 in Windows
2896636 You cannot use certain third-party devices to send a document to a shared folder in Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2
http://support.microsoft.com/kb/2896636
Update(s):
Srv.sys
2973055 Error 58 when an application calls BackupRead function to back up files that are shared by using SMB in Windows
http://support.microsoft.com/kb/2973055
Update(s):
Mrxsmb20.sys
2952507 "0x00000050" Stop error when you browse files by using Windows Explorer on a remote desktop in Windows 7 SP1 or Windows 8.1
http://support.microsoft.com/kb/2952507
2820470 Delayed error message when you try to access a shared folder that no longer exists in Windows 8, Windows 8.1, Windows Server 2012, or Windows Server 2012 R2
Note: This is only a registry key change
NFS:
===
2934249 NFS version 4.1 and version 3 work unexpectedly in Windows Server 2012 R2 or Windows Server 2012
http://support.microsoft.com/kb/2934249
Update(s):
Msnfsflt.mof
Nfs-servercore-ppdlic.xrm-ms
Nfssvr.mof
Nfssvr.sys