Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 144

www.dell.com | support.dell.com Configuring Layer 2 and Layer 3 ACLs on an Interface Both Layer 2 and Layer 3 ACLs may be configured on an interface in Layer 2 mode. If both L2 and L3 ACLs are applied to an interface, the following rules apply: • The packets routed by FTOS are governed by the L3 ACL only, since they are not filtered against an L2 ACL. • The packets switched by FTOS are first filtered by the L3 ACL, then by the L2 ACL. • When packets are switched by FTOS, the egress L3 ACL does not filter the packet. For the following features, if counters are enabled on rules that have already been configured and a new rule is either inserted or prepended, all the existing counters will be reset: • L2 Ingress Access list • L3 Egress Access list • L2 Egress Access list If a rule is simply appended, existing counters are not affected. Table 10-2. L2 and L3 ACL Filtering on Switched Packets L2 ACL Behavior Deny Deny Permit Permit L3 ACL Behavior Deny Permit Deny Permit Decision on Targeted Traffic Denied by L3 ACL Permitted by L3 ACL Denied by L2 ACL Permitted by L2 ACL Note: If an interface is configured as a "vlan-stack access" port, the packets are filtered by an L2 ACL only. The L3 ACL applied to such a port does not affect traffic. That is, existing rules for other features (such as trace-list, PBR, and QoS) are applied accordingly to the permitted traffic. For information on MAC ACLs, refer to the Access Control Lists (ACLs) chapter in the FTOS Command Line Reference Guide. 144 | IP Access Control Lists (ACL), Prefix Lists, and Route-maps