Ixia EE11ABG3 User Manual
EmulationEngine 11a/b/g User's Guide
Traffic Source: Select Internal or E xternal from the list box. In Internal
mode, traffic is generated internally by each vSTA us ing ICMP Echo (Ping)
Request/Reply packets. In External mode, packets coming into the
EmulationEngine over 802.3 are mapped to virtual stations by source IP or
MAC address and forwarded via 802.11. Packets coming back via 802.11
are remapped to the originating MAC address.
Layer 2/Layer 3: If External is selected in the Traffic Source field, select
one of these radio buttons to identify the external frames to be captured.
If Layer 2 is selected, frames will b e capt ured based on the source 802.3
MAC address. If Layer 3 is selected, frames will be captured based on th e
source IP address. For vSTAs configured at layer 3, IP and ARP packets
generated from this hos t that contain the virtual station's IP address as a
source will be translated at the MAC layer to appear as if sourced from the
virtual station's MAC address.
Target IP Address: Enter the target IP address where ICMP Echo (Ping)
Requests should be sent. The default IP address (0.0.0.0) shown in this
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example dialog must be replaced by a valid IP address (e.g.,
10.10.10.19).
Packet Length: Specify the size of the ping data buffer (64...1024). The
default is 1024.
Count: Specify the total number of pings to be sent: 0.. .10000 (0=None).
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Click “Create” to create the group.
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Click “Cance l” to exit this d ialog.
vSTA->New Group->Runtime
The Runtime section of the New Emulation Group dialog allows you to run
a virtu al station’s t est multiple times. This is only applicable to internal
traffic generation. After each iteration of a test, the state of the virtual
station can be set to a “base state”. A user-defined delay between
successive iterations is defin ed in milliseconds. Op tionally, any r esults
collected for the virtual station can be cleared at the start of each
iteration.
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Number of Iterations: Enter the number of times (1...10000) to repeat
the virtual station’s task (Ping) or select the Infinite checkbox to
continuously iterate indefinitely.
Iteration Delay: Enter the delay (in milliseco nds) to be introduced
between iterations of the test. It can be set to a value in the range:
0...300000 milliseconds (5 minutes).
Before Running Next Iteration->Reset vSTA State to: Select a state
from the list box. Each virtual station in this group will be reset to t he
selected state (initialized, authenticated, or associated) at the end of
each iteration.
Before Running Next Iteration->Clear vSTA Results: Select this
check box to clear test results before successive iterations of the test.
RTS Threshold: Enter a value in the range 1...2346 to define the RTS
threshold for the virtual station(s) in this group. Any frame to be
transmitted by a virtual station that exceeds the RTS threshold, will
require a successful RTS/CTS frame exchange before the frame is
transmitted. The minimum value (1) effectively requires RTS/CTS fo r all
transmit frames. The maximum value (2346) is the maximum 802.11
frame size and effectively disables RTS.
Fragmentation Threshold: Enter a value in the range 256...2346 to
define the fragmentation thres hold for the virtual station(s) in this group.
The fragme ntation threshold will lim it the number of bytes in any 802.11
frame transmitted by the virtual station(s). If this field is set to 2346 (i.e.,
the maximum 802.11 frame size), fragmentation is effectively disabled.
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Click “Create” to create the group.
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Click “Cance l” to close this dialog .
vSTA->New Group->On Error
The On Error section of the New Emulation Group dialog defines whether
virtual stations should reconnect to the System Under Test during a test if
the system de-authenticates or disassociates a virtual station.
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Persist: Select this checkbox to e nable o r disable persistence. When
enabled, vir tual stations in this group will r emain persistent (connected) if
the System Under Test de-authenticates or disassociates. If the
EmulationEngine loses connection to a System Under Tes t, persistence will
allow it to recover and continue the test at the point where it was
interrupted. For example, if a virtual station is in a run or associated state
and an 802.11 management frame (deauth or disasso c) is sent by the
System Under Test and received by the EmulationEngine, the virtual
station will attempt to return to the state it was in before the
management frame was received. If the virtual station was running a ping
test, the pin g test will cont inue. If it was in an associa ted state, the virtual
station will reissue the associat e req uest.
Retries: This field sp ecifies the n umber of times the EmulationEngine
should issue authentication and association requests bef ore failing the
operation. It can be a value in the range 0...10.
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Timeout: This field specifies the timeout value (in millise conds) for
authentication and association requests. It can be set to a value in the
range 250...60000 milliseconds (1 minute).
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Click “Create” to create the group.
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Click “Cance l” to close this dialog .
vSTA->New Group->Encryption
This section of the New Gro up dialog defines whether the virtual station
will use encryption, the associa ted cip her to be used and t he type of
authentication (Open System or Shared Key) to be used for authenticating
with the System Under Test.
NOTE: The four shared keys for Wired Equivalency Privacy (WEP)
encryption must be defined in the Encryption Def aults dialog in the
Configuration side bar.
Encryption: Select this checkbox to ena ble/disable encryption.
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Authentication: Select the authentication type: Open System or Shared
Key.
Cipher Selection: Reserved for future use. WEP is the only supported
selection in this release.
Shared Key Index: This section of the dialog will show the shared keys
that were defined in the Encryption Default dialog. See "Configuration>Encryptio n". Select th e shared key to be used. These keys will be used
for encryption by virtual stations in this scenario group with the System
Under Test.
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Click “Create” to create the group.
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Click “Cance l” to close this dialog .
vSTA->Edit Group
The following dialog is displayed when the Edit Group button is selected in
the vSTA side bar.
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This dialog is the same as "vSTA->New Group" dialog except it does not
have a vSTA tab. After virtual stations have been created, MAC and IP
Addresses cannot be changed. See "vSTA->New Group" for a description
of the fields in this dialog.
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Click “Modify” to modify all virtual stations with t he new settings.
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Click “Cance l” to close this dialog without modifying any virtual stations.
vSTA->Delete Group
When the Delete Group button is selected from the vSTA side bar, a
confirmatio n dialog will ask you to confirm this selection.
EmulationEngine 11a/b/g User's Guide
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Click “Yes” to remove the group and all virtual stations in it from the
system.
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Click “No” to close this dialog without removing the group.
vSTA->Add New vSTA to Group
The following dialog is shown when the Add New vSTA to Group button is
selected in the vSTA side bar.
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This dialog is used to add new virtual stations to an existing scenario
group. All fields in this dialog default to the values that have were initially
entered when the group was created. Any changes to this dialog will also
update these group default values. See "vST A->New Group" for a
description of the fields in this dialog.
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Click “Add” to add the virtual station.
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Click “Cance l” to close this dialog .
EE (EmulationEngine) Side Bar
The buttons in this side bar are used to configure and manage the
EmulationEngine and to select and join with a System Under Test.
Select SUT: Click this button in the EE side bar to display the Select
System Under Test dialog.
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Join SUT: Click this button in the EE side bar to join with the System
Under Test.
Configure EE: Click this button in the EE side bar to configure the
EmulationEngine.
Reconnect EE: Click this button in the EE side bar to reconnect to the
EmulationEngine. This is used after a reboot of the EmulationEngine.
Reset EE: Click this button in the EE side bar to reset all statistics
counters to zer o and all virtual stations to a configured state.
Reboot EE: Click this button in the EE side bar to reboot the
EmulationEngine.
EE->Select SUT
When the Select SUT button is selected in the EE side bar, the Select
System Under Test dialog is displayed:
EmulationEngine 11a/b/g User's Guide
Wireless Mode: This field shows the EmulationEngine’s current wireless
mode (11a, 11b, or 11g). You can select a different wireless mode from
the list box. The web-based user interface will issu e a command to the
EmulationEngine to change its wireless mode and scan for compatible
systems. The results of the new scan will be reflected in the BSSIDs in the
list box.
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Click o n a BSSID in the list box.
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Select “Join” to join with the selected System Under Test.
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Selec t “Rescan” to update the list of BSSIDs. This selection will cause the
EmulationEngine to scan for Basic Service Set IDs and update the list of
available systems.
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Click “Cancel” to close this dialog without selecting a System Under Test.
If a scenario with virtual stations already exists and you have previously
joined with a system , the following dialog will be displayed if you select a
different BSSID in the Select System Under Test dialog:
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Click “Yes” to continue and join with a different System Under Test.
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Click “No” to return to the Select System Under Test dialog.
EE->Join SUT
When the Join SUT button is selected in the EE side bar, a confirmation
dialog is displayed:
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Click “Yes” to join with the System Under Test.
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Click “No” to cancel this operation.
EE->Configure EE
The Configure EmulationEngine dialog is a tabbed dialog that defines the
interaction with the web-based user interf ace and EmulationEngine
operational parameters.
EE->Configure EE->UI
When the Configure EE button is selected in the EE side bar, the Configure
EmulationEngine dialog is displayed:
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EE Id: This field is set by the system and canno t be changed.
EE Address: This field shows the EmulationEngine's IP address.
Receive Parameters
EE Polling Interval: This entry defines t he interval (in milliseconds) that
the Command PC will poll the EmulationEngine for command and control
messages from the virtual stations. It can be set to a value in the range:
250...60000 milliseconds (1 minute). If this time expires without an
expe cted response from th e EmulationEn gine, the user interface will
display "Busy" next to the EmulationEngine icon in the toolbar. The "Busy"
message indicates that the EmulationEngine is not responding to the user
interface. Under normal conditions, the "Busy" message may appear
periodically for short periods of time. If the “Busy” message appears
freq uently, you may want to increase the value assigned to the EE Polling
Interval. Also see Chapter 9, Troubleshooting/EmulationEngine Busy or
Not Responding.
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Max Messages Per Poll: Specify the maximum number of messages to
receive in each poll: 1...128.
EE Polling Timeout: This entry defines t he time (in milliseconds) that
the Command PC will wait for a resp onse from the EmulationEngine. It
can be set to a value in the range: 500...120000 milliseconds (2 minutes).
The recommended value is two t imes the EE Polling Interval value. If this
time expires without an expected response from the EmulationEngine, the
user interface w ill display a dialog indicating that th e EmulationEngine is
not responding. When you dismiss the dialog, the status of the
EmulationEngine/System Under Test c onnection in th e toolbar will display
“Off line”. If this dialog and “Offline” status appears fr equently, a larger
value should be assigned to the EE Polling Timeo ut. Also see Chapter 9,
Troubleshooting/EmulationEngine Busy or No t Responding.
NOTE: Also see the Monitor Update Interval and Monitor Update Timeout
in Monitors->Config Monitors for the interval and update timeout values
that are used by the command PC to collect statistics values.
Transmit Parameters
Batch EE Requests: This checkbox enables/disables batching of r equest
messages to be sent to the EmulationEngine. When virtual stations are
running in an iterative fashion or you issue commands to many virtual
stations, this will produce a large number of r equests to the we b server on
the EmulationEngine. Request batching will maintain a numbe r of these
requests over a period of time (defined by the Batch Reques t Interval)
and then issue one large reque st with all pending instructions.
NOTE: If you are currently running or intend to run a Load Prof ile,
batching EE requests may affect the timing of the Load Profile if the Batch
Request Interval is greater than the timing specified in the Load Profile.
Batch Request Interval: If "Batch EE Requests" is checked/enabled,
specify the interval at which the web-based user int erface will collect
(batch) requests and send them to the EmulationEngine. It can be set to a
value in the range: 250...60000 milliseconds (1 minute).
Max Requests Per Batch: Specify the maximum number of requests
that should be batched before they are sent to the virtual stations. When
this num ber of requests have been batched , they will be sent to the
EmulationEngine even if the Batch Request Interval has not expired.
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Select the EE tab to define other EmulationEngine's configuration
parameters.
EE->Configure EE->EE/Basic
This section of the Configuration EmulationEngine dialog defines the basic
configuration of the EmulationEngine.
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EE Id: This field is set by the system and canno t be changed.
EE Address: This field shows the EmulationEngine's current IP address.
IP Address: Enter the EmulationEngine's new IP address. Use a dot IP
address (e.g., 192.168.0.50). If you change this field, you must select the
Reboot option from the EE sidebar in order for the new IP Address to be
recognized and used in the EmulationEngine.
IP Netmask: Enter the EmulationEngine's network mask. The network
mask of the EmulationEngine must match the IP subnet addressing
scheme for internal mode te sting (it is not used for external mode). For
example, if the EmulationEngine's IP address is 10.1.40.18 and the
system being tested is 10.1.35.17, then the subnet mask is 16 bits or
255.255.0.0.
NOTE: If you change the IP Address of the EmulationEngine and reboot,
the web client does not automatically change its EmulationEngine IP
address. You will need to do it manually. You will need to restart the web
browser after the EmulationEngine has rebooted .
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Gateway Address: Enter the EmulationEngine's default gateway IP
address. Use a dot IP address (e.g., 192.168.0.50).
WLAN MAC Base Address: The Wireless LAN MAC address defaults to a
specific address (typic ally in the 00:0b:cd:xx:xx:xx
range). It is a globally unique MAC address that is programmed in to the
EmulationEngine hardware. The address can be changed to any nonbroadcast or non-multicast valid MAC address. If you use multiple
EmulationEngine's at your facility, each should have a WLAN MAC wh ose
prefix is unique. For example, on the first EmulationEngine, use WLAN
MAC Address: 04:0d:e0:62:23:57 and on the second EmulationEngine,
use WLAN MAC Address: 06:0f:14:62:32:a0.
WLAN MAC Mask: This address is used in conjunction with the WLAN
Base MAC Address for configuration of virtual stations. If for example, the
WLAN MAC is set to 00:0b:cd:59:23:44 and the mask is set to
ff:ff:ff:ff:00:00, the only MAC addresses that can be detected on WLAN
and received by the EmulationEngine are: 00:0b:cd:59:00:00 00:0b: cd:59:ff:ff. All ot her MAC addresses will be filtered out. The mask
limits the range of MAC addresses that are assigned to virtual stations.
The mask that is specified here will be displayed in the WLAN MAC Mask
field when the vSTA tab is selected in the New Emulation Group dialog
(See vSTA->New Group->vSTA).
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Click “OK” to save this configuration.
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Click “Cance l” to close this dialog .
EE->Configure EE->EE/Radio
This section of the EE->Conf igure EE dialog defines the wireless mode and
data rate of the EmulationEngine.
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