Why was the default MTU size of Loop back interface changed from Rhel 6 to Rhel 7?

Solution Verified - Updated -

Issue

  • RHEL5 and 6 environment, default MTU size of Loop back interface is 16436.

But RHEL 7 environment, default MTU size of Loop back interface is 65536.

# ifconfig lo
    lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
            inet 127.0.0.1  netmask 255.0.0.0
            loop  txqueuelen 1000  (Local Loopback)

Could you please tell me why default MTU size was changed on RHEL 7?

Environment

Red Hat Enterprise Linux 6, 7

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