4-20 SmartCell ZX-250 User Guide
Traffic Management
Switch Administration
Use the command
show CACEqBwAllocScheme
to view the current CAC policies used by each port for each service
type and referenced by
VPI
.
SmartCell ZX # show caceqbwallocscheme
PortID(ALL) :
Vpi(0) :
===========================================================
Port# VPI Alloc Scheme
for
CBR RT-VBR NRT-VBR UBR ABR
===========================================================
A1 0 CON CON CON LIB CON
A2 0 CON CON CON LIB CON
A3 0 CON CON CON LIB CON
A4 0 CON CON CON LIB CON
B1 0 CON CON CON LIB CON
B2 0 CON CON CON LIB CON
B3 0 CON CON CON LIB CON
B4(CPU) 0 CON CON CON LIB CON
C1 0 CON CON CON LIB CON
C2 0 CON CON CON LIB CON
C3 0 CON CON CON LIB CON
C4 0 CON CON CON LIB CON
D1 0 CON CON CON LIB CON
D2 0 CON CON CON LIB CON
D3 0 CON CON CON LIB CON
D4 0 CON CON CON LIB CON
SmartCell ZX #
If there are a large number of connections of a particular QoS on a particular port, and these connections begin to slow
down and show signs of congestion, use the
set CACEqBwAllocScheme
command to change the CAC policy to
moderate or conservative.
SmartCell ZX # set caceqbwallocscheme
PortID(A1) : b2
Vpi(0) :
SeriveCategory(CBR) : ubr
AllocScheme(LIBERAL) :conservative
SmartCell ZX #
The SmartCell ZX-250 performs buffering using a shared-memory architecture. Buffer space is divided into queues
for each QoS. In turn, ports are allocated some portion of each of the QoS queues. This allocation is controlled on a
per-port basis by the
porttrafficcongestion
commands.
Qos is defined on an end-to-end basis in terms of cell loss ratio, cell transfer delay, and cell delay variation.
Summary of Contents for SmartCell ZX-250
Page 12: ...xii SmartCell ZX 250 User Guide Table of Contents...
Page 16: ...xvi SmartCell ZX 250 User Guide List of Tables...
Page 18: ...1 2 SmartCell ZX 250 User Guide Introduction...
Page 46: ...3 8 SmartCell ZX 250 User Guide Creating an Emulated LAN IP Over ATM and LANE...
Page 92: ...4 46 SmartCell ZX 250 User Guide Performing Hardware Maintenance Switch Administration...
Page 98: ...5 6 SmartCell ZX 250 User Guide Troubleshooting Congestion Troubleshooting...
Page 110: ...A 12 SmartCell ZX 250 User Guide Acronyms...
Page 124: ...C 8 SmartCell ZX 250 User Guide Managing the SmartCell ZX 250 Agent Support...