Hello Minglai,
I can see that your reservation has ended a few hours ago. When you reserve a lab, remember that you can adjust the duration of labs up to 7 days to meet your testing needs:
Once you've reserved a lab, you will receive an email with lab connection information. This email will instruct you how to download and install AnyConnect. In the email, you'll also receive a network address, username, and password to connect to your lab's private network using AnyConnect VPN.
Finally, you'll want to log into the Sandbox, then click 'Lab Management' > 'Reservations' to gain access to your reservations dashboard. Click on your current reservation to enter the lab. In here, you'll see the topology you mentioned in the first post, but with IP addresses and their connection information. Hover on the resource and click the attributes button to check out their usernames and passwords.
Attributes button
Server Attributes (i.e. UN & PW):
Once you've connected to VPN and completed these steps, you can access the server just like they're sitting on your local network. If a server is at 10.10.20.1, just trying pinging it to verify access. Then you can try accessing it through it's normal method, such as using a web browser, SSH, or RDP.
Let me know if this works out, and if you've got additional questions.
Thanks!
Jacob
