Cabletron Systems 04-0053-01 manual No Traffic Descriptor, PeakCellRate CLP0+1, BestEffort

Traffic Management Capabilities Traffic Management

ATM SmartSwitch user data cells are classified according to the state of a cell loss priority (CLP) bit in the header of each cell. A CLP 1 cell has a lower priority than a CLP 0 cell and is discarded first. Source traffic descriptors can specify CLP 0 cell traffic, CLP 1 cell traffic, or the aggregate CLP 0+1 traffic.

Use the trafficdescriptor commands to view, create, and delete traffic descriptors.

For example, enter the show trafficdescriptor command to view all currently defined traffic descriptors.

SmartSwitch # show trafficdescriptor

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TD# Traff	Desc	QoS	Peak Cell Rate	Sust Cell	Rate	Max Burst Size	Min Cell Aal Type
Type	Type		(Kb/s)	(Kb/s)		(Kb/s)	Rate
			CLP_0 CLP_0+1	CLP_0 CLP_0+1		CLP_0 CLP_0+1	(Kb/s)

=========================================================================================

1	NRTVBR	7	0	0	10872	5436	0	2052	0	0	5
2	CBR	2	1	0	100	0	0	0	0	0	5
176	NRTVBR	2	1	0	1585	0	0	0	0	0	5

SmartSwitch #

Note You cannot use the default traffic descriptors for user-defined PVCs. All traffic descriptors used to define PVCs must be created by the user.

The Descriptor Type parameter in the example above corresponds to the traffic descriptor types defined in the UNI3.0/UNI3.1 specification. Descriptor types are specified numerically and correspond to the descriptions in Table 6-1.

Table 6-1 Traffic descriptor type number explanation

Type	Valid Service	Descriptor Characteristics
	Category
1		No Traffic Descriptor
2	CBR	PeakCellRate CLP0+1
3	CBR	PeakCellRate CLP0+1, PeakCellRate CLP0
4	CBR	PeakCellRate CLP0+1, PeakCellRate CLP0, Tag CLP = 1
5	VBR	PeakCellRate CLP0+1, SustCellRate CLP0+1, MaxBurstSize CLP0+1
6	VBR	PeakCellRate CLP0+1, SustCellRate CLP0, MaxBurstSize CLP0
7	VBR	PeakCellRate CLP0+1, SustCellRate CLP0, MaxBurstSize CLP0, Tag CLP = 1
8	ABR	PeakCellRate CLP0+1, Minimum Cell Rate
11	UBR	BestEffort

6-2 SmartSwitch ATM User Guide