Cabletron Systems 6500 - Manual (Page 81)

SmartSwitch 6500 User Guide 6-3
Virtual Ports and Static Connections PVC Connections
However, on a point-to-multipoint connection there should be no traffic in the backward direction, so we define the
backward traffic descriptor with its Cell Loss Priorities set to zero (0)
Smart6500 # add trafficdescriptor
TrafficType(UBR) : < This is the backward traffic descriptor
TrafficDescriptorType(11) :
PCRCLP01(100) : 0 < Set PCRCLP01 to zero
QOSCLASS(0) :
AalType(5) :
Smart6500 #
2. Use show trafficdescriptor to obtain the new traffic descriptors’ index numbers.
Smart6500 # show trafficdescriptor
========================================================================================
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
3 UBR 11 0 0 100 0 0 0 0 0 5
4 UBR 11 0 0 0 0 0 0 0 0 5
176 NRTVBR 2 1 0 1585 0 0 0 0 0 5
Smart6500 #
In the example above, traffic descriptor three (3) will be used in the forward direction, and traffic descriptor four (4)
will be used in the backward direction.
3. Use add pvc to successively create point-to-multipoint PVCs for ports B2, B3, and C1.
Smart6500 # add pvc
ConnType(PTP) : pmp
Port-1-Number() : 7a1
Port-1-VPCI() : 0
Port-1-VCI() : 101
Port-2-Number() : 7a2
Port-2-VPCI() : 0
Port-2-VCI() : 101
Port1-to-Port2TrafficDescriptorIndex() : 3
Port2-to-Port1TrafficDescriptorIndex() : 4
Smart6500 #
4. Perform step 3 for ports 7a3 and 7a4.
5. Connect the workstations to their respective ports.
6. Configure the workstations for the same subnet and VPCI/VCI pair = 0/101.
The broadcasting workstation on port 7a1 can send traffic to the receiving workstations on ports 7a2, 7a3, and 7a4.