TCAM lookups

TCAM lookups are a finite hardware resource used in the application of ACLs and policies (including port access policies) to packets being processed in switch hardware. ADC (analytics data collection) also consumes TCAM lookups. There are a limited number of ACL and policy features that can be enabled at the same time.

NOTE:

In the following TCAM lookup lists, "IP" means both IPv4 and IPv6.

There are five TCAM lookups available to use for these features. Each of these features uses one TCAM lookup when enabled. At most, five of these features can be enabled at the same time.

Ingress Port IP ACL
Ingress Port MAC ACL
Ingress Port Policy
Ingress Routed Port Policy
Ingress Port Access Client Policy
Ingress VLAN IP ACL
Ingress VLAN MAC ACL
Ingress VLAN Policy
Ingress Routed VLAN Policy
Ingress L2 Tunnel
Ingress Global Policy
Ingress IP ADC
Port Access Client Policy

There are four TCAM lookups available for these features. Each of these features uses one TCAM lookup when enabled. At most, four of these features can be enabled at the same time.

Egress Port IP ACL
Egress Port MAC ACL
Egress Port Policy
Egress VLAN IP ACL
Egress VLAN MAC ACL
Egress VLAN Policy