Siemens A31003-D3000-M100-01-76A9 Administrator User Manual page 50

Administration
IP Network Parameters
50
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 (low priority), AF2Y, AF3Y and
AF4Y (high priority).
Three drop levels Y are reserved for AFXY: AFX1 (low drop probability), AFX2
and AFX3 (High drop probability). In the case of low drop level, packets are
buffered over an extended period in the case of high drop level, packets are
promptly rejected if they cannot be forwarded.
Data required
• Layer 3: Activates or deactivates QoS on layer 3.
Value range: "Yes", "No"
Default: "Yes"
• Layer 3 voice: Sets the CoS (Class of Service) value for voice data (RTP
streams).
Value range: "BE", "AF11", "AF12", "AF13", "AF21", "AF22", "AF23", "AF31",
"AF32", "AF33", "AF41", "AF42", "AF43", "EF", "CS7", "CS3", "CS4", "CS5",
0, 1, 2 ... through 63.
Default: "EF"
• Layer 3 signalling: Sets the CoS (Class of Service) value for signaling. Value
range: "BE", "AF11", "AF12", "AF13", "AF21", "AF22", "AF23", "AF31",
"AF32", "AF33", "AF41", "AF42", "AF43", "EF", "CS7", "CS3", "CS4", "CS5",
0, 1, 2 ... through 63.
Default: "AF31"
OpenScape Desk Phone IP, Phone Administration, Administrator Documentation
A31003-D3000-M100-01-76A9, 02-2013