Read the Cisco CSR 1000v Series Cloud Services Router Release Notes to verify the following:
Because the GigabitEthernet0 interface is no longer supported beginning with Cisco IOS XE Release 3.11S, you will receive system errors if the upgraded configuration includes this interface.If downgrading from Cisco IOS XE Release 3.11S to an earlier release, note also that the management interface will need to change to GigabitEthernet0 for the earlier release.īe sure to complete the following prerequisites for upgrading the Cisco IOS XE version of the router software image: If upgrading to Cisco IOS XE Release 3.11S from an earlier release, we recommend that you update your configuration to remove the GigabitEthernet0 management interface before upgrading.
