ACL architecture packet flow
The packet flow from ingress to egress in the ACL architecture is as follows:
- The implementation FDB filter utilizes the MAC address table to drop packets with specific MAC addresses. It does this after examining the MAC address table.
- The corresponding template checks the received packets to see if the VLAN is attached to the template.
- The packets pass the template examination, while the active destination IP filters further filter the packets based on the specific destination IP address.
- Other modules that are not part of the ACL may process the packets.
- The egress packets may be directed to different traffic classes according to active MAC priority entries which assign traffic class values to FDB entries.
There are four traffic classes. The mechanism for traffic class 0 to 3 is Weighted Round Robin (WRR), while traffic class 4 is strict priority (SP).
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