Airlive POE-GSH2404M handleiding
Handleiding
Je bekijkt pagina 168 van 200
The 802.1Q header contains 3-bit PRI fields. PRI field defines 8 CoS of business
priority ranging from 7 to 0 from high to low.
IP Precedence/DSCP Field
According to RFC791 definition, ToS (Type of Service) domain in the IP message
header is composed of 8 bits. Among them, the 3-bit long Precedence field, as located in
the following, identifies the IP message priority.
IP Precedence/DSCP Field
0 to 2 bits are Precedence fields representing the 8 priorities of message
transmission ranging from 7 to 0 from high to low, with either Level 7 or 6 as the highest
priority that is generally reserved for routing or updating network control communication.
User-level applications only have access to Level 0 to 5.
ToS domain, in addition to Precedence fields, also includes D, T and R bits: D-bit
represents the Delay requirement (0 for normal delay and 1 for low delay). T-bit represents
the throughput (0 for normal throughput and 1 for high throughput). R-bit represents the
reliability (0 for normal reliability and 1 for high reliability). ToS domain reserves the 6 and 7
bits.
RFC1349 redefines the ToS domain by adding a C-bit to represent the Monetary
Cost. The IETF DiffServ group then redefines the 0 to 5 bits of ToS domain in the IPv4
message header of RFC2474 as DSCP and renames it as DS (Differentiated Service) byte
as shown in the figure above.
The first 6 bits (0-5 bits) of DS field distinguish the DSCP (DS Code Point), and the
higher 2 bits (6-7 bits) are reserved. The lower 3 bits (0-2 bits) are CSCP (Class Selector
Code Point), with the same CSCP value representing the DSCP of the same class. D
168
Bekijk gratis de handleiding van Airlive POE-GSH2404M, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Airlive |
| Model | POE-GSH2404M |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 72641 MB |
