CODEWITHSUNDEEP
udpmtu
user2269707
user2269707

Reputation:

What happens if my udp package is larger than mtu

What would happen if my udp package is larger than mtu? Say my package is 512 bytes, after encapsulated, the package is 572 bytes. In transporting, some intermediate node fix it mtu size to 512 bytes, so what happens? Does my package simply being discarded?

In general, what is the best size of a udp package which fits for most of network situation?

Upvotes: 11

Views: 6089

Answers (1)

mshildt
mshildt

Reputation: 9342

The package will still be sent, however the network interface layer (i.e. ethernet) will use multiple network transmissions to send it. You are still limited in size however by the maximum size for a UDP datagram (65535) as enforced by UDP/IP. See MTU and UDP Packets on Wikipedia for more info.

Upvotes: 11

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