Siemens 20 User Manual

administration.fm

A31003-O1010-M100-9-76A9, 05/05/2008
HiPath 8000 - OpenStage Family, Administration Manual

   

  

  

Network > QoS

Diffserv assigns a class of service to an IP packet by adding an entry in the IP header.

Traffic flows are classified into 3 per-hop behavior groups:

1.

Default
Any traffic that does not meet the requirements of any of the other defined classes is placed 
in the default per-hop behaviour group. Typically, the forwarding has best-effort forwarding 
characteristics. The DSCP (Diffserv Codepoint) value for Default is "0 0 0 0 0 0".

2.

Expedited Forwarding (EF referred to RFC 3246)
Expedited Forwarding is used for voice (RTP streams) by default. It effectively creates a 
special low-latency path in the network. The DSCP (Diffserv Codepoint) value for EF is 
"1 0 1 1 1 0".

3.

Assured Forwarding (AF referred to RFC 2597)
Assured forwarding is used for signaling messages by default (AF31). It is less stringent 
than EF in a multiple dropping system. The AF values are containing two digits X and Y 
(AFXY), where X is describing the priority class and Y the drop level. 
Four classes X are reserved for AFXY: AF1Y (high priority), AF2Y, AF3Y and AF4Y (low 
priority).

 

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--- Administration

       

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--- Network

             

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--- QoS

                   

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--- Service

                         |--- Layer 2
                         |--- Layer 2 voice
                         |--- Layer 2 signalling
                         

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--- Layer 2 default