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Summary Of Acl Actions; Understanding Acl Precedence - HP 438031-B21 - 1:10Gb Ethernet BL-c Switch Application Manual

Hp 1:10gb ethernet bl-c switch for c-class bladesystem application guide.
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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
Precedence Group 1
Precedence Group 2
Precedence Group 3
Precedence Group 4
Precedence Group 5
Precedence Group 6
Precedence Group 7
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
ACLs
ACL 1 – ACL 128
ACL 129 – ACL 256
ACL 257 – ACL 384
ACL 385 – ACL 512
ACL 513 – ACL 640
ACL 641 – ACL 768
ACL 769 – ACL 896
Quality of Service
Precedence Level
Low
High
87

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