Cabletron Systems SmartSwitch 6500 User Manual page 92

Traffic Management Capabilities
SmartSwitch 6500 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
For example, enter the
show trafficdescriptor
Smart6500 # show trafficdescriptor
========================================================================================
TD# Traff Desc QoS
Type Type
=========================================================================================
1 NRTVBR 7 0
2 CBR 2 1
176 NRTVBR 2 1
Smart6500 #
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 7-1.
Table 7-1
Type Valid Service
Category
1
2 CBR
3 CBR
4 CBR
5 VBR
6 VBR
7 VBR
8 ABR
11 UBR
7-2 SmartSwitch 6500 User Guide
commands to view, create, and delete traffic descriptors.
command to view all currently defined traffic descriptors.
Peak Cell Rate Sust Cell Rate
(Kb/s) (Kb/s)
CLP_0 CLP_0+1 CLP_0
0 10872 5436
0 100 0
0 1585 0
Traffic descriptor type number explanation
Descriptor Characteristics
No Traffic Descriptor
PeakCellRate CLP0+1
PeakCellRate CLP0+1, PeakCellRate CLP0
PeakCellRate CLP0+1, PeakCellRate CLP0, Tag CLP = 1
PeakCellRate CLP0+1, SustCellRate CLP0+1, MaxBurstSize CLP0+1
PeakCellRate CLP0+1, SustCellRate CLP0, MaxBurstSize CLP0
PeakCellRate CLP0+1, SustCellRate CLP0, MaxBurstSize CLP0, Tag CLP = 1
PeakCellRate CLP0+1, Minimum Cell Rate
BestEffort
Max Burst Size
(Kb/s)
CLP_0+1 CLP_0 CLP_0+1
0 2052 0
0 0 0
0 0 0
Traffic Management
Min Cell Aal Type
Rate
(Kb/s)
0 5
0 5
0 5