Siemens SCALANCE XM-400 Configuration Manual page 800

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Load control

10.5 Service classes

The parameters have the following meaning:

interface-type

interface-id

For information on names of addresses and interfaces, refer to the section "Interface

identifiers and addresses (Page 42)".

The prioritization for forwarding packets is configured.

Keyword for a an interface description

Type or speed of the interface

Module no. and port no. of the interface

Incoming packets are forwarded with the priority of the receiving port. If

there is a DSCP value in the IP header, this is ignored. If a VLAN tag

exists, it is replaced by the priority value of the receiving port.

If an incoming packet contains a VLAN tag, it is forwarded with this pri-

oritization. If there is a DSCP value in the IP header, this is ignored. If

the packet does not contain a VLAN tag it is forwarded with the prioritiza-

tion of the receiving port.

If an incoming packet contains a DSCP prioritization, it is forwarded with

this prioritization. If there is a VLAN tag, this is ignored. If the packet

does not contain DSCP prioritization it is forwarded with the prioritization

of the receiving port.

With an incoming packet, there is a sequential check to determine which

prioritization it contains. If it contains a DSCP prioritization, it is handled

as in the "Trust DSCP" mode. If it does not contain any DSCP prioritiza-

tion, it is checked for a VLAN tag. If it contains a VLAN tag, it is forward-

ed with this prioritization. If the packet does not contain DSCP

prioritization or a VLAN tag it is forwarded with the prioritization of the

receiving port.

SCALANCE XM-400/XR-500 Command Line Interface (CLI)

Configuration Manual, 06/2016, C79000-G8976-C252-11

Range of values / note

Enter a valid interface.