1-54
IM AQ1300-01EN
1.20 Y.1564 Test
Y.1564 is a ITU-T recommendation that defines the procedure for measuring the processing capability
of Ethernet services.
It can be used to measure the communication traffic processing capability for a given network
bandwidth setting and verify the effect of traffic congestion on the circuit.
The AQ1300/AQ1301 can perform the following measurements contained in ITU-T Y.1564:
• IR step test
• Burst size test
• Service performance test
IR Step Load Test (IR test)
In an IR step load test, frame signals are sent to network devices while increasing the traffic rate in
steps to measure the following parameters:
• Information rate (IR)
• Frame loss (FL)
• Frame transfer delay (FTD)
• Frame delay variation (FDV)
In a single measurement, up to eight service circuits can be measured in order.
CIR test
STEP1
(
T s
)
CIR test
STEP2
(
T s
)
CIR test
STEP3
(
T s
)
CIR test
STEP4
(
T s
)
EIR test
(
T s
)
Traffic
policing
test
(
T s
)
250
500
750
1000
CIR
1250
CIR+EIR
Transmission rate (Mbps)
Green frames
Yellow frames
Red frames
Test result is not displayed
on the AQ1300/AQ1301.
Example of IR step load (per service)
Test time (seconds)
Minimum rate (CIR
×
%): 25%
The Tx rate when the minimum rate of CIR test is set to 25% is 250
Mbps, which is one-fourth the CIR Tx rate (1000 Mbps).
Service setting example (SLA)
Enter the CIR and EIR regions for each service (service numbers 1 to 8) on the AQ1300/AQ1301,
and set the Tx rate.
CIR: 1000 Mbps
EIR: 250 Mbps
Green and yellow frames are sent when colors are assigned (CoS, ToS, DSCP).
Red frames are sent automatically during traffic policing tests. When colors are assigned, red
frames correspond to the region where the EIR value of yellow frames sent at 125% the EIR rate
is exceeded.
1312.5
CIR+EIR×125%
T = 1 to 60 s
