Any specified MTU required for cloudera cluster ?

[#1]

I am using a six node cluster(5.8). Recently, we have done GDE(file system encryption). Hosted on IBM softlayer environment.

Encryption process done by different team. They asked a question

We set the Hadoop server MTU to 1400 from the previous 1576 in order to get the packets to move through the encrypted tunnel. Is this OK for Cloudera to work?

Some please respond to my query ASAP.

[#2]

It will work. This will diminish the network throughput and could impact the cluster performance if the typical workload is Network IO bound.

In my experience, with predominantly 10 Ge networks, I have not been bound by the network running at the default 1500.