Dell S5000 FTOS 9.0(1.3) Configuration Guide for the Switch - Page 116
Test CAM Usage, Implementing ACLs on FTOS, ACLs and VLANs
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www.dell.com | support.dell.com Test CAM Usage The test cam-usage command is supported on the S5000 platform. This command applies to the IPv4 ingress CAM partition. Use this command to determine if sufficient ACL CAM space is available to enable a service-policy. Create a Class Map with all required ACL rules, then execute the test cam-usage command in Privilege mode to verify the actual CAM space required. The example below gives a sample of the output shown when executing the command. The status column indicates whether or not the policy can be enabled. Figure 7-1. Command Example: test cam-usage ) FTOS#test cam-usage service-policy input TestPolicy stack-unit all Stack-unit | Portpipe | CAM Partition | Available CAM | Estimated CAM per Port | Status 2 | 1 | IPv4Flow | 232 | 0 | Allowed 2 | 1 | IPv6Flow | 0 | 0 | Allowed 4 | 0 | IPv4Flow | 232 | 0 | Allowed 4 | 0 | IPv6Flow | 0 | 0 | Allowed FTOS# Implementing ACLs on FTOS You can assign one IP ACL per interface with FTOS. If an IP ACL is not assigned to an interface, it is not used by the software in any other capacity. The number of entries allowed per ACL is hardware-dependent. If counters are enabled on IP ACL rules that are already configured, those counters are reset when a new rule is inserted or prepended. If a rule is appended, the existing counters are not affected. This is applicable to the following features: • L2 Ingress Access list • L2 Egress Access list • L3 Ingress Access list • L3 Egress Access list Note: IP ACLs are supported over VLANs in Version 6.2.1.1 and higher. V ACLs and VLANs There are some differences when assigning ACLs to a VLAN rather than a physical port. For example, when using a single port-pipe, if you apply an ACL to a VLAN, one copy of the ACL entries would get installed in the ACL CAM on the port-pipe. The entry would look for the incoming VLAN in the packet. Whereas if you apply an ACL on individual ports of a VLAN, separate copies of the ACL entries would be installed for each port belonging to a port-pipe. 116 | Access Control Lists (ACLs)
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