Which ACL would be processed first if all were applied on a device?

Last Updated: Jan 12, 2021
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Which ACL would be processed first if all were applied on a device?

  • Inbound PACL on a switch port in VLAN 10
  • Inbound VACL on VLAN 10
  • Inbound ACL on the VLAN 10 SVI
  • Outbound VACL on VLAN 20
  • Outbound ACL on the VLAN 20 SVI

Explanation: PACLs, VACLs, and RACLs have a specific order in which they are processed. For routed traffic across VLANs, the processing order is as follows:

  1. Inbound PACL on a switch port in VLAN x
  2. Inbound VACL on VLAN x
  3. Inbound ACL on the VLAN x SVI
  4. Outbound VACL on VLAN y
  5. Outbound ACL on the VLAN y SVI

Related exam: Quiz- Network Device Access Control and Infrastructure Security

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