Hirschmann RS20 Reference Manual page 135

QoS/Priority

display the maximum number of queues possible per port.
The device supports 4 (8 for MACH 4000, MACH 104, MACH 1040 and
PowerMICE) priority queues (traffic classes in compliance with IEEE
802.1D).
 select the trust mode globally. You use this to specify how the device
handles received data packets that contain priority information.

"untrusted"
The device ignores the priority information in the packet and always
assigns the packets the port priority of the receiving port.
 "trustDot1p":
The device prioritizes received packets that contain VLAN tag
information according to this information (assigning them to a traffic
class - see
The device prioritizes received packets that do not contain any tag
information (assigning them to a traffic class - see
priority") according to the port priority of the receiving port .
 "trustIpDscp":
The device prioritizes received IP packets (assigning them to a traffic
class - see
The device prioritizes received packets that are not IP packets
(assigning them to a traffic class - see
according to the port priority of the receiving port .
For received IP packets:
The device also performs VLAN priority remarking.
In VLAN priority remarking, the device modifies the VLAN priority of
the IP packets if the packets are to be sent with a VLAN tag
page 127 "VLAN
Based on the traffic class to which the IP packet was assigned (see
above), the device assigns the new VLAN priority to the IP packet in
accordance with
Example: A received IP packet with a DSCP value of 32 (cs4) is
assigned to traffic class 2 (default setting). The packet was received at
a port with port priority 2. Based on
to 4.
RM GUI L2E
Release 8.0 05/2013
"802.1D/p mapping").
"IP DSCP mapping") according to their DSCP value.
Static").
table 91.
"Entering the port
"Entering the port
table 91, the VLAN priority is set
5.1 Global
priority")
(see on
135