HP 1:10Gb Ethernet BL-c Switch for c-Class BladeSystem Application Guide

Quality of Service

• Packet Format

○ Ethernet format (eth2, SNAP, LLC)

○ Ethernet tagging format

• Egress port packets

Note that the egress port ACL will not match a broadcast, multicast, unknown unicast, or Layer 3

packet. The egress port ACL will not match packets if the destination port is a trunk member.

Summary of ACL actions

Actions determine how the traffic is treated. The HP 1:10GbE switch QoS actions include the following:

• Pass or Drop

• Re-mark a new DiffServ Code Point (DSCP)

• Re-mark the 802.1p field

• Set the COS queue

Understanding ACL precedence

Each ACL has a unique precedence level, based on its number. When an incoming packet matches the

highest precedence ACL, the ACL’s configured action takes place. The other assigned ACLs also are

considered, in order of precedence.

ACLs are divided into Precedence Groups, as shown in the following table.

Precedence Group ACLs Precedence Level

Precedence Group 1 ACL 1 – ACL 128 Low

Precedence Group 2 ACL 129 – ACL 256

Precedence Group 3 ACL 257 – ACL 384

Precedence Group 4 ACL 385 – ACL 512

Precedence Group 5 ACL 513 – ACL 640

Precedence Group 6 ACL 641 – ACL 768

Precedence Group 7 ACL 769 – ACL 896 High

NOTE: Precedence Groups are not related to ACL Groups.

Each Precedence Group has its own precedence level, such that Precedence Group 2 has a higher

precedence level than Precedence Group 1. Within each Precedence Group, higher-numbered ACLs

receive higher precedence, so that the lowest-numbered ACL has the lowest precedence level, and the

highest-numbered ACL has the highest precedence level. However, the other ACLs within the Precedence

Group have an unspecified precedence level, as follows:

ACL 1 = lowest precedence level within Precedence Group 1

ACL 2 = unspecified precedence level within Precedence Group 1

ACL 3 = unspecified precedence level within Precedence Group 1

...

ACL 126 = unspecified precedence level within Precedence Group 1

ACL 127 = unspecified precedence level within Precedence Group 1

ACL 128 = highest precedence level within Precedence Group 1