Hirschmann RS20 User Manual page 146

Network Load Control
Assured Forwarding (AF): Provides a differentiated schema for
handling different data traffic (RFC2597).
Default Forwarding/Best Effort: No particular prioritizing.
The PHB class selector assigns the 7 possible IP precedence values from
the old ToS field to specific DSCP values, thus ensuring the downwards
compatibility.
ToS Meaning
Network Control
Internetwork Control
Critical
Flash Override
Flash
Immediate
Priority
Routine
Table 14: Assigning the IP precedence values to the DSCP value
146
Precedence Value Assigned DSCP
111
110
101
100
011
010
001
000
CS7 (111000)
CS6 (110000)
CS5 (101000)
CS4 (100000)
CS3 (011000)
CS2 (010000)
CS1 (001000)
CS0 (000000)
8.4 QoS/Priority
Basic Configuration
Release 6.0 07/2010