Contemporary-control-systems Compact Managed Switches Software Manual for Web B Manuale Utente Scaricare il pdf (Pagina 38)

TD020851-0MG

Lower Table — Map DiffServ DSCP and Priority Queue

Sometimes called the “second generation of Internet QoS”, Differentiated Services

(DiffServ) was first described by RFC2474 which redefines the TOS octet to allocate its

first six bits as the Differentiated Services Code Point (DSCP). The DSCP field

selects the per-hop behaviour (PHB) which defines how packets are queued at network

nodes. RFC 2475 describes DiffServ methods for implementing scalable differentiated

services on the Internet.

Figure 33 — Map DiffServ DSCP and Priority Queue

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 82 83

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Contemporary-control-systems Compact Managed Switches Software Manual for Web B Manuale Utente Pagina 38