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5.10. DSCP Configuration
Assured
Forwarding (AF)
PHB
Assured Forwarding (AF): Has four classes and three
drop-precedence within each class (so a total of twelve
codepoints). Excess AF traffic is not delivered with as high
probability as the traffic "within profile," which means it may be
demoted but not necessarily dropped DiffServ AF
Expedited
Forwarding (EF)
PHB
Expedited Forwarding (EF): Has a single codepoint (DiffServ
value). EF minimizes delay and jitter and provides the highest
level of aggregate quality of service. Any traffic that exceeds the
traffic profile (which is defined by local policy) is discarded
DiffServ EF
Default
Select TOS value as 0.
User Assign
Special DSCP Code
User can set other unspecified value here
Differentiated Services (DiffServ, or DS) is a protocol for specifying and controlling
network traffic by class so that certain types of traffic get precedence - for example,
voice traffic, which requires a relatively uninterrupted flow of data, might get
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