question

Hi Guys ,

I am a new bee to spirent and have created a script which fetches xml file and tries to run from it but looks like it doesnt works at all :

I get the follwoing error on hCapture line :

hCapture = stc.get(hPortRx, "children-capture")

Error:

Spirent: 22:43:42.324 INFO - stc::get port2 -children-capture
Spirent: 22:43:42.324 ERROR - in get: invalid handle "port2": should have been obtained using create or get
Traceback (most recent call last):
File "SpirentSTCtraffic1.py", line 125, in <module>
hCapture = stc.get(hPortRx, "children-capture") #<port handle means the handle of the port on which capture needs to be performed.
File "path/StcPython.py", line 71, in get
retSvec = self.stcInt.salGet(handle, svecDashes)
RuntimeError: in get: invalid handle "port2": should have been obtained using create or get

why do i get this error ?

please find my script below:

#!/usr/bin/env python2.7

import sys

print sys.argv[1]

ENABLE_CAPTURE = True

from StcPython import StcPython
stc = StcPython()

stc.log("INFO", "Starting Test")

# This line will show the TestCenter commands on stdout
# stc.config("automationoptions", logto="stdout", loglevel="INFO")

# Retrieve and display the current API version.
print("SpirentTestCenter system version:\t", stc.get("system1", "version"))

# Physical topology

# Create the root project object

print("Creating project ...")
hProject = stc.create("project")

stc.config("automationoptions", logto="stdout", loglevel="INFO")

### Spirent Chassis and port details
#stc.reserve("{0}/{1}/{2} {3}/{4}/{5}".format(szChassisIp, iTxSlot, iTxPort, szChassisIp, iRxSlot, iRxPort))

szChassisIp = "10.22.32.2"
port1 = "2/2"
port2 = "2/4"
port_list = ['$port1',' $port2']

hPortTx = stc.create("port", under=hProject, location="//{0}/{1}".format(szChassisIp, port1), useDefaultHost="False")
hPortRx = stc.create("port", under=hProject, location="//{0}/{1}".format(szChassisIp, port2), useDefaultHost="False")


##### Load the saved .xml file. Modify the path as per your requirement.

stc.perform("LoadFromXml", Filename=sys.argv[1])

stc.apply()

# Connect to a chassis
print("Connecting ", szChassisIp)
stc.connect(szChassisIp)

## reserve the ports
print("Reserving / and / ".format(szChassisIp, port1, szChassisIp, port2))

stc.reserve("{0}/{1} {2}/{3}".format(szChassisIp, port1, szChassisIp, port2))

# Create the mapping between the physical ports and their logical
# representation in the test configuration.

print("Set up port mappings")
stc.perform("SetupPortMappings")

#Issue these commands to get the devices and port handles
#hProject = stc.get("system1", "children-project")

print ("project", hProject)

portList = stc.get(hProject, "children-port")
print ("ports" , portList)

deviceList = stc.get(hProject, "children-emulateddevice")
print ("devices" , deviceList)

##Query and list the streamblocks
sb_list = []
portList = portList.split()
for port in portList :
sb = stc.get(port, 'children-streamblock');
sb_list.append(sb );

print ("the list of streamblocks :", sb_list)


### start all devices
stc.perform("DevicesStartAll")

### start streamblocks
stc.perform("streamblockstartcommand" , StreamBlockList = sb_list)

# Subscribe the Streamblock Level Statistics
rds1 = stc.subscribe(Parent=hProject, resultparent=sb_list, ConfigType="StreamBlock", viewAttributeList="StreamId", resulttype="TxStreamResults")
rds2 = stc.subscribe(Parent=hProject, resultparent=sb_list, ConfigType="StreamBlock", viewAttributeList= ['FrameCount', 'StreamIndex', 'DroppedFrameCount'], resulttype="RxStreamSummaryResults")

# Refresh the views. Refresh is applied only on the receiving side to get the real time stats.
stc.perform("RefreshResultViewCommand" , ResultDataSet = rds2)

print ("the value of rds1 is :", rds1)
print ("the value of rds2 is :", rds2)

# Stop the streamblocks
stc.perform("streamblockstopcommand" , StreamBlockList = sb_list)


#### get the resultHandle and Pagecount
resultList = stc.get(rds2, "ResultHandleList")
resultList = resultList.split()

for result in resultList :
print("FrameCount :", stc.get(result, "FrameCount"))
print ("StreamIndex :", stc.get(result, "StreamIndex"))
print ("DroppedFrameCount :", stc.get(result, "DroppedFrameCount"))

###Stop all devices
print ("Stoping all the Devices ...\n")
stc.perform("DevicesStopAllCommand")

print (" ......................END OF TEST ......................................\n")

#perform generator and analyzer start

stc.perform("GeneratorStart", GeneratorList=hProject )
stc.perform("AnalyzerStart", AnalyzerList=hProject)

# Create a capture object. Automatically created and start capture
hCapture = stc.get(hPortRx, "children-capture") #<port handle means the handle of the port on which capture needs to be performed.
stc.config(hCapture, mode="REGULAR_MODE", srcMode="TX_RX_MODE")
stc.perform("CaptureStart", captureProxyId=hCapture)

#from time import gmtime, strftime
#print(strftime("%Y-%m-%d %H:%M:%S", gmtime()), " Retrieving Captured frames...")

stc.perform("CaptureStop", captureProxyId=hCapture)

# Save captured frames to a file.
stc.perform("CaptureDataSave", captureProxyId=hCapture, FileName="capture.pcap", FileNameFormat="PCAP", IsScap="FALSE")

print("Captured frames:\t", stc.get(hCapture, "PktCount"))


# Stop the generator.
stc.perform("GeneratorStop", GeneratorList=hProject)

# Stop the analyzer.
stc.perform("AnalyzerStop", AnalyzerList=hProject)

# Display some statistics.
hAnalyzerResults = stc.get(hProject, "children-AnalyzerPortResults")

print (hAnalyzerResults)

# Disconnect from a chassis
print("Disconnect from the chassis ...")
szChassisIp="10.22.12.4"
stc.disconnect(szChassisIp)
#stc.perform("CSTestSessionDisconnect", terminate="true")
# Delete configuration
print("Deleting project")
stc.delete(hProject)

stc.log("INFO", "Ending Test")