The definitions for Priority 1 and Priority 2 are:

Priority 1 (P1): An existing network is down or there is a critical impact to the customer’s business operations. The customer and Cisco will commit necessary resources “around the clock” to resolve the situation.

Priority 2 (P2): Operation of an existing network is severely degraded, or significant aspects of the customer’s business operations are negatively impacted by inadequate performance of Cisco products. The customer and Cisco will commit resources during normal business hours to resolve the situation.