Global - Hirschmann RS20 Reference Manual

QoS/Priority

5.1 Global

With this dialog you can:
enter the IP-DSCP value for management packets in the range 0 to 63
(default setting: 0 (be/cs0)).
In order for you to have full access to the management of the device, even
when there is a high network load, the device enables you to prioritize
management packets.
In prioritizing management packets (SNMP, Telnet, etc.), the device
sends the management packets with priority information.
Note the assignment of the IP-DSCP value to the traffic class
table 18).
Note: Certain DSCP values have DSCP names, such as be/cs0 to cs7
(class selector) or af11 to af43 (assured forwarding) and ef (expedited
forwarding).
display the maximum number of queues possible per port.
The device supports 4 (8 for MACH 4000 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 informa-
tion (assigning them to a traffic class - see „802.1D/p Mapping").
The device prioritizes received packets that do not contain any VLAN
tag information (assigning them to a traffic class - see „Entering the
port priority") according to the port priority of the receiving port .
"trustIpDscp"
The device prioritizes received IP packets (assigning them to a traffic
class - see „IP DSCP mapping") according to their DSCP value.
The device prioritizes received packets that are not IP packets
(assigning them to a traffic class - see „Entering the port priority")
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
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5.1 Global
(see
RM Web L2B
Release 5.0 04/09