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#mtu

MTU and packet size in cloud networks — where the 9001-byte and 1500-byte boundaries sit, and why a large transfer hangs while a ping succeeds.

1 article tagged #mtu, newest first.

August 21, 2026
EC2 MTU: 1500 vs 9001, and Why Jumbo Frames Break at the VPC Edge
EC2 instances default to a 9001-byte MTU inside the VPC and 1500 bytes to the internet. Where the boundary sits, and why transfers hang while pings succeed.