Catalyst 3550 switches use Switch Database Management (SDM) templates to configure memory resources in the switch and optimize support for specific features, depending on how the switch is used in the network. One of the four available templates can be chosen to specify how system resources are allocated. This affects the maximum number of unicast MAC addresses, Internet Group Management Protocol (IGMP) groups, Quality of Service (QoS) Access Control Entries (ACEs), security ACEs, unicast routes, multicast routes, routed interfaces and Layer 2 (L2) VLANs that can be configured on the switch.
To configure Policy-Based Routing (PBR) on the Catalyst 3550 switch, the SDM template must be modified to enable the switch to support the 144-bit Layer 3 (L3) Ternary Content Addressable Memory (TCAM). Without this template, the switch allows a route-map command to be created and applied to an interface. This is done by issuing the ip policy route-map command. However, it does not show up in the configuration and PBR is not effective.