How can I have an alert that is triggered and sends a page send another page in say 30 minutes if the alert is still an issue? Example: If a router goes down and pages me once I want to to page me again in 30 minutes to make sure I am awake and aware of the issue.
In the Advanced Alerts, edit the alert and go to the Trigger Actions. Highlight the Paging action. There is an Alert Escalation tab that you can configure to repeat this action every so often to remind that it is still an issue. It doesn't look like it can be done in the Basic Alerts.