Why are large packets not working between UML virtual machines?
There appears to be a problem with packets larger than 1484 bytes when communication is passed over two or more UML virtual machines and a remote system via the parent system. Run the uml_fix script on all UML virtual machines and the parent system. This has been integrated into ADIOS version 1.2 onwards. But you still need to run uml_fix when manually setting up connections between virtual machines.