There is currently an open Caveat CSCuz58508 which prevents the MTU from being applied when set on the Gig interface on the AWS Marketplace CSR 1000V version 16.3.1a. Unfortunately this has forced us to downgrade to the 03.16.04.aS version available in the AWS marketplace. Though 03.16.04.aS does not suffer from the MTU issue it has much slower boot times on relaunch. Cisco XE 16.4.1 is noted in the Caveat as the version this has been fixed in and we would like to update to this version to take advantage of the faster boot times observed in the 16.3.1a. Is there a timeframe on when Cisco XE 16.4.1 will be available in the AWS marketplace? If not 16.4.1 a patched version of 16.3 that allows setting the MTU would also suffice.