Cabletron Systems SmartCell 6A000 - Manual (Page 53)

SmartCell 6A000 User Guide 4-19
Switch Administration Traffic Management
SmartCell 6A000 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.
SmartCell ZX# show trafficdescriptor
TD# Traff Desc QoS Peak Cell Rate Sust Cell Rate Max Burst Size Aal VC
Type Type (Kb/s) (Kb/s) (Kb) Type Type
CLP_0 CLP_0+1 CLP_0 CLP_0+1 CLP_0 CLP_0+1
============================================================================
1 UBR 8 4 0 34 0 0 0 0 5 PVC
2 NRTVBR 2 1 0 1372 0 0 0 0 5 PVC
3 CBR 3 1 500 1000 0 0 0 0 3 PVC
4162 UBR 8 0 0 138889 0 0 0 0 5 SVC
7632 UBR 8 0 0 138889 0 0 0 0 5 SVC
7661 UBR 8 0 0 138889 0 0 0 0 5 SVC
7983 UBR 8 0 0 138889 0 0 0 0 5 SVC
8046 UBR 8 0 0 138889 0 0 0 0 5 SVC
11642 UBR 8 0 0 138889 0 0 0 0 5 SVC
SmartCell ZX#
The Descriptor Type parameter in the example above corresponds to the traffic descriptor types defined in the
UNI3.0/UNI3.1specification. Descriptor types are specified numerically and are as follows:
1 = No Traffic Descriptor
2 = Traffic Descriptor with no CLP and no SCR
3 = Traffic Descriptor with CLP, no Tagging, and no SCR
4 = Traffic Descriptor with CLP, Tagging, and no SCR
5 = Traffic Descriptor with no CLP and SCR
6 = Traffic Descriptor with CLP, no Tagging, and SCR
7 = Traffic Descriptor with CLP, Tagging, and SCR
8 = Traffic Descriptor with CLP and best effort
PVCs can use user-defined traffic descriptors. For instance, if a video link over a PVC requires a constant data flow of
5000 kb/s and a peak cell rate of 8000 kb/s, create a traffic descriptor for CBR traffic that specifies 5000 as the
sustained cell rate and 8000 as the peak cell rate.
SmartCell ZX # add trafficdescriptor
TrafficType(UBR) : CBR
TrafficDescriptorType(8) : 3
PCRCLP01(0) : 8000
PCRCLP0(0) :
SCRCLP01(0) : 5000
SCRCLP0(0) :
MBSCLP01(0) : 10000
MBSCLP0(0) :
QOSClass(1) :
AALType(5) :
SmartCell ZX #