Configure Max Transfer Unit (MTU) size for the TCPIP stack
31 December 2000 by Snakefoot | Comment » | Trackback OffThe default Max Transfer Unit (MTU) size for ethernet is 1500 bytes, if using a network with a different MTU size, then one should make sure to configure MTU in Windows to avoid packet fragmentation and loss of VPN connections.
Related Configure Max Transfer Unit (MTU) in Windows Vista/2008/7
- Adapter MTU:
[HKEY_LOCAL_MACHINE \SYSTEM \CurrentControlSet \Services \Tcpip \Parameters \Interfaces \{Adapter-id/GUID}]
MTU = 1500
More Info MS KB Q900926 - Point-To-Point Protocol (PPP) MTU for Modem DialUp Networking(DUN) or over Ethernet (PPPoE):
More Info MS KB Q283070[HKEY_LOCAL_MACHINE \SYSTEM \CurrentControlSet \Services \NdisWan \Parameters \Protocols \0]
ProtocolType = 0x00000800
PPPProtocolType = 0x00000021
ProtocolMTU = 1500
More Info MS KB Q283165
More Info MS KB Q826159
More Info MS KB Q317496
- Virtual Private Network (VPN) Tunnel MTU:
[HKEY_LOCAL_MACHINE \SYSTEM \CurrentControlSet \Services \NdisWan \Parameters \Protocols \0]
ProtocolType = 0x00000800
PPPProtocolType = 0x00000021
TunnelMTU = 1400
More Info MS KB Q826159
Related Configure Max Transfer Unit (MTU) in Windows Vista/2008/7
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76bUpdated: 10 October 2012