MTU: mtu inside the tunnel

zehome / MLVPN

Multi-link VPN (ADSL/SDSL/xDSL/Network aggregation / bonding)

http://www.mlvpn.fr/

BSD 2-Clause "Simplified" License

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MTU: mtu inside the tunnel #125

Closed LovingFox closed 4 years ago

LovingFox commented 5 years ago

Is it possible to set MTU for the MLVPN-tunnel interface?

For example there is a WAN Ethernet link with MTU 1400. Increasing is impossible. I set tunnel through that WAN. And I need to have possible send and receive packets size 1550 via the tunnel. How can I do it?

Schema: Host1 --> (1550) lan SERVER1 wan (1400) -- [MLPN-tunnel MTU 1550] -- (1400) wan SERVER2 lan (1550) --> Host2

zehome commented 4 years ago

MLVPN does not support fragmentation. You NEED to set the correct MTU on the sending side, by using TCP MSS or using small UDP packets.