Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.1P1 - Page 733
such as SIP/DIP/TCP/UDP/SRC PORT/DST PORT/ ICMP., for the Dell Networking OS software through L3 ACL
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Page 733 highlights
You can use the ecn keyword with the ip access-list standard, ip access-list extended, seq, and permit commands for standard and extended IPv4 ACLs to match incoming packets with the specified ECN values. Similar to 'dscp' qualifier in the existing L3 ACL command, the 'ecn' qualifier can be used along with all other supported ACL match qualifiers such as SIP/DIP/TCP/UDP/SRC PORT/DST PORT/ ICMP. Until Release 9.3(0.0), ACL supports classification based on the below TCP flags: • ACK • FIN • SYN • PSH • RST • URG You can now use the 'ecn' match qualifier along with the above TCP flag for classification. The following combination of match qualifiers is acceptable to be configured for the Dell Networking OS software through L3 ACL command: • Classification based on DSCP only • Classification based on ECN only • Classification based on ECN and DSCP concurrently You can now use the set-color yellow keyword with the match ip access-group command to mark the color of the traffic as 'yellow' would be added in the 'match ip' sequence of the class-map configuration. By default, all packets are considered as 'green' (without the rate-policer and trust-diffserve configuration) and hence support would be provided to mark the packets as 'yellow' alone will be provided. By default Dell Networking OS drops all the 'RED' or 'violate' packets. The following combination of marking actions to be specified match sequence of the class-map command: • set a new DSCP for the packet • set the packet color as 'yellow' • set the packet color as 'yellow' and set a new DSCP for the packet This marking action to set the color of the packet is allowed only on the 'match-any' logical operator of the class-map. This marking-action can be configured for all of the below L3 match sequence types: • match ip access-group • match ip dscp • match ip precedence • match ip vlan Quality of Service (QoS) 733
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