Netgear GSM7224v2 - 24-Port Layer 2 Managed Gigabit Switch 사용자 설명서

Dropping - Drop a packet upon arrival. This is useful for emulating access control list 

operation using DiffServ, especially when DiffServ and ACL cannot co-exist on the same 
interface.

Marking IP DSCP or IP Precedence - Marking/re-marking the DiffServ code point in a 

packet with the DSCP value representing the service level associated with a particular 
DiffServ traffic class. Alternatively, the IP Precedence value of the packet can be 
marked/re-marked.

Marking CoS (802.1p) - Sets the three-bit priority field in the first/only 802.1p header to a 

specified value when packets are transmitted for the traffic class. An 802.1p header is 
inserted if it does not already exist. This is useful for assigning a layer 2 priority level 
based on a DiffServ forwarding class (i.e., DSCP or IP Precedence value) definition to 
convey some QoS characteristics to downstream switches which do not routinely look at 
the DSCP value in the IP header.

Policing - A method of constraining incoming traffic associated with a particular class so 

that it conforms to the terms of the TCS. Special treatment can be applied to out-of-profile 
packets that are either in excess of the conformance specification or are non-conformant. 
The DiffServ feature supports the following types of traffic policing treatments (actions):

drop - The packet is dropped

mark cos - The 802.1p user priority bits are (re)marked and forwarded

mark dscp - The packet DSCP is (re)marked and forwarded

mark prec - The packet IP Precedence is (re)marked and forwarded

send: the packet is forwarded without DiffServ modification

Color Mode Awareness - Policing in the DiffServ feature uses either color blind or color 
aware mode. Color blind mode ignores the coloration (marking) of the incoming packet. 
Color aware mode takes into consideration the current packet marking when determining 
the policing outcome. An auxiliary traffic class is used in conjunction with the policing 
definition to specify a value for one of the 802.1p, Secondary 802.1p, IP DSCP, or IP 
Precedence fields designating the incoming color value to be used as the conforming 
color. The color of exceeding traffic may be optionally specified as well.

Counting - Updating octet and packet statistics to keep track of data handling along traffic 

paths within DiffServ. In this DiffServ feature, counters are not explicitly configured by the 
user, but are designed into the system based on the DiffServ policy being created. See 
the Statistics section of this document for more details.

Assigning QoS Queue - Directs traffic stream to the specified QoS queue. This allows a 

traffic classifier to specify which one of the supported hardware queues are used for 
handling packets belonging to the class.

Redirecting - Forces classified traffic stream to a specified egress port (physical or LAG). 

This can occur in addition to any marking or policing action. It may also be specified along 
with a QoS queue assignment.