Help Center> Virtual Private Cloud> FAQ> VPC and Subnet> What Do I Do If the ECS IP Address Is Lost After the ECS System Time Has Been Changed?
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What Do I Do If the ECS IP Address Is Lost After the ECS System Time Has Been Changed?

Cause: The failure occurs because the time difference between the old and new time is longer than your DHCP lease time. The default DHCP lease time set when you create a subnet on the public cloud system is 365 days (24 hours for subnet created before). If you manually change the ECS system time and the time difference between the old and new time is longer than 365 hours (24 hours for subnet created before), the DHCP lease fails to renew and the ECS IP address will be lost.

Solution: If you do need to change the ECS system time, and the time difference is longer than your DHCP release time, change the ECS IP address assignment mode to be static before changing the ECS system time.

Parent topic: VPC and Subnet