Specifications

Chapter 2. IBM System Networking Switch 10Gb Ethernet switch features 99
򐂰 TCP flag value, as shown in Table 2-6
Table 2-6 TCP flag values
򐂰 Packet format (for regular ACLs and VMaps only)
– Ethernet format (eth2, SNAP, LLC)
– Ethernet tagging format
– IP format (IPv4, IPv6)
򐂰 Egress port packets (for all ACLs)
Summary of ACL actions
After the packet flows are classified by using ACLs, they can be processed differently. For
each ACL, an action can be assigned. The action determines how the switch treats packets
that match the classifiers assigned to the ACL. ACL actions include the following actions:
򐂰 Pass or Drop the packet
򐂰 Remark the packet with a new DiffServ Code Point (DSCP)
򐂰 Remark the 802.1p field
򐂰 Set the COS queue
ACL order of precedence
When multiple ACLs are assigned to a port, they are evaluated in numeric sequence, based
on the ACL number. Lower-numbered ACLs take precedence over higher-numbered ACLs.
For example, ACL 1 (if assigned to the port) is evaluated first and has top priority.
If multiple ACLs match the port traffic, only the action of the one with the lowest ACL number
is applied. The others are ignored.
If no assigned ACL matches the port traffic, no ACL action is applied.
37 time 119 NNTP 520 rip
42 name 123 NTP 554 rtsp
43 whois 143 IMAP 1645/1812 RADIUS
53 domain 144 news 1813 RADIUS
accounting
69 TFTP 161 SNMP 1985 hsrp
70 gopher 162 snmptrap
Port Application Port Application Port Application
Flag Value
URG 0x0020
ACK 0x0010
PSH 0x0008
RST 0x0004
SYN 0x0002
FIN 0x0001