Guidelines and limitations for QoS policies

QoS rules and service policy rules (in the access control policy) are translated to commands on the firewall. This includes creating policy maps. There can be only one policy map per interface. The system automatically combines QoS and service policy configurations in a single policy map per interface.

However, you can also create policy maps manually using FlexConfig. For lower-end firewalls, such as the Secure Firewall 3100, you can create up to 64 policy maps in the configuration. For more powerful firewalls, such as the Firepower 4100, you can create up to 128. Be careful not to exceed this limit, or deployment will fail. You can view the device configuration from the CLI or use the deployment transcript to see how rules are translated to commands.