Netgear XCM8806 Chassis User Manual - Page 362

NETGEAR 8800 User Manual ACL-Based Traffic Groups An ACL-based traffic group allows you to use ACL rules in an ACL policy file to define the traffic to which you want to apply QoS. An ACL-based traffic group requires more effort to create, but the ACL rules give you more control over which traffic is selected for the traffic group. For example, you can use an ACL to add traffic to a traffic group based on the following frame or packet components: • IP source or destination address • IP protocol • TCP flag • TCP, UDP, or other Layer 4 protocol • TCP or UDP port information • IP fragmentation • MAC source or destination address • Ethertype Depending on the platform you are using, traffic in an ACL traffic group can be processed as follows: • Assigned to an ingress meter for rate limiting • Marked for an egress QoS profile for rate shaping • Marked for an egress traffic queue for rate shaping • Marked for DSCP replacement on egress • Marked for 802.1p priority replacement on egress When you are deciding whether to use an ACL-based traffic group or another type of traffic group, consider what QoS features you want to apply to the traffic group. Some QoS features can only apply to ACL-based traffic groups. Note: ACLs are discussed in detail in Chapter 13, ACLs . CoS 802.1p-Based Traffic Groups CoS 802.1p-based traffic groups forward traffic to QoS features based on the three 802.1p priority bits in an Ethernet frame. The 802.1p priority bits are located between the 802.1Q type field and the 802.1Q VLAN ID as shown in Figure 22. Note: On the BlackDiamond 10808, 12800 series, and 20800 series switches only: If a port is in more than one virtual router, that port does not support 802.1p-based traffic groups. 362 | Chapter 15. QoS