FRITZ!Box 6490 Cable Service - Knowledge Base
- FRITZ!Box 6840 LTE
- FRITZ!Box 6820 LTE
- FRITZ!Box 6810 LTE
- FRITZ!Box 6590 Cable
- FRITZ!Box 5490
- FRITZ!Box 4040
Adjusting the MTU size in the FRITZ!Box
The FRITZ!Box does not allow you to adjust the MTU size manually. This is also not necessary because the FRITZ!Box supports the MSS clamping procedure (Maximum Segment Size) that automatically adjusts the size of data packets being sent to a connected network with a smaller MTU. As a result there will be no performance losses due to fragmented or discarded data packets.
Note:The Maximum Transmission Unit (MTU) is the maximum size of user data that can be transferred in a single data packet. A maximum MTU of 1500 bytes is available when using the FRITZ!Box with a cable connection. This value may then be further reduced by additional connection protocols used by the internet service provider.