Summary Of Acl Actions; Understanding Acl Precedence - HP GbE2c - Blc Layer 2/3 Fiber SFP Option Application Manual

Table 15 Well-known application ports
Number
69
70
Table 16 Well-krown TCP flag values
Flag
URG
ACK
PSH
RST
SYN
FIN
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 GbE2c 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. Each Precedence Group provides a
different set of packet classifiers for the ACLs within the Precedence Group.
Table 17 ACI Precedence Groups
Precedence Group
Precedence Group 1
TCP/UDP Number
Application
tftp 161
gopher 162
ACLs
ACL 1 – ACL 127
TCP/UDP Number
Application
snmp 1985
snmptrap
Value
0x0020
0x0010
0x0008
0x0004
0x0002
0x0001
Packet Classifiers
Source MAC address
Destination MAC address
Ethernet Type
VLAN ID
802.1p
Packet Format
TCP/UDP
Application
Precedence Level
Low
Quality of Service 72