Ixia Software Release Notes
UHD 1.0
Build Number: 1.0.127(July, 2020)

About This Release

Welcome to the UHD 1.0 release. This is the first software release for the Ixia UHD100T32, QSFP28 Ultra-HighDensity 32-Port Test System. 

The UHD application is a purpose built web application to run Layer 2 to 3 testing on a UHD platform. 
It lets users configure control plane using protocol emulation, build data plane traffic and also run RFC benchmark quick tests. 
UHD100T32 is a self contained system to which users can connect via a web browser to run tests as well as perform administrative tasks like license and chassis management. 

Please see sections below for application and hardware compatibility, new features, resolved issues, and known issues.

Application Compatibility

The following applications are compatible with UHD1.0:
Application Version
UHD Application 1.0
KCOS 1.0
Wireshark 1.8
Licensing 5.20
The following web browsers are compatible with UHD1.0:
Web Browser Version
Google Chrome 75 or newer
Mozilla Firefox 49 or newer
Microsoft Internet Explorer 11 or newer
Microsoft Edge 44.17763.1.0 or newer
Apple Safari 12.1.1 or newer
New features and bug fixes are provided through updates to the KCOS operating system and UHD application running on the UHD100T32. For the list of compatible components for the UHD100T32, use the on-line compatibility tool. For more information on compatibility, contact us at https://www.ixiacom.com/contact/info.


A UHD100T32 chassis must have appropriate licenses installed. The UHD100T32 chassis ships from the factory with the no licenses installed. 

Installing a License:

An email should have been received with your Activation Codes as per the option selected while purchasing. If it has not been received yet, please contact your Ixia Sales Representative or Ixia Customer Support. To add new license login to the UHD web interface and navigate to --> Top right Wheel menu -> Administration --> License Manager -> Activate License. On the next dialog enter all activation codes for the unit. Offline license registration is also available.

Installation Notes

UHD100T32 has all the software preinstalled on it. A supported web browser is required to access UHD100T32 web application.

Update UHD100T32 Software
1. Download latest UHD100T32 software update packages from https://support.ixiacom.com/version/uhd100t32-10
2. Copy packages to a USB flash drive and plug the USB flash drive to a USB port on the UHD100T32 front panel. The USB disk partitions are visible under /media/auto/ directory in admin shell.
2. Copy packages over SCP/SFTP.
3. Run the following command
kcos deployment offline-install path/to/package.tar
4. Reboot the UHD100T32 with the following command
kcos system reboot

For more detailed steps follow the link in additional documentation.

How to Report Problems

Ixia Headquarters

+1 877 367 4942 - Toll-free North America
+1 818 871 1800 - Outside North America
+1 818 871 1805 - Fax


Global Support +1 818 595 2599


APAC Support +91 80 4939 6410


Australia +61 74 243 4942


EMEA Support +40 21 301 5699


Greater China Region

+40 0898 0598


Hong Kong +852 3008 4465


India Office +91 80 4939 6410


Japan Head Office +81 3 5326 1980


Korea Office +82 2 3461 0095


Singapore Office +65 6215 7700


Taiwan (local toll-free number) 008 0185 6991


Additional Documentation

Please refer to our website at https://support.ixiacom.com/version/uhd100t32-10.
A login and password is required to enter this section of the web site. If you do not have the username and password, please forward your request to support@ixiacom.com.

Field Notices

Safety Notice Regarding UHD100T32 Chassis

WARNING: In order to prevent accidental injury to personnel, do not leave the QSFP28 transceiver cages uncovered on the UHD100T32 chassis. When transceivers are not installed, port end caps must be used. The metal edge of the transceiver cage is SHARP. To avoid injury, ALWAYS keep the open transceiver cage covered with the end cap. Contact ISG Technical Support to obtain replacement end caps (part number 503-0012).

What's New

UHD 1.0 features

944-1180: IXIA, UHD100T32, Ultra-high density network infrastructure test system, 32 port fixed chassis model with native QSFP28 100GE physical interfaces and L2-3 support, 1RU chassis.
U100-BASE: IXIA, UHD Base Tier ,1 year Subscription for UHD100T32, Ultra-high density network infrastructure test system, 32 port fixed chassis model with native QSFP28 100GE physical interfaces and L2-3 support, 1RU chassis.
U100-STANDARD: IXIA, UHD Standard Tier,1 year Subscription for UHD100T32, Ultra-high density network infrastructure test system, 32 port fixed chassis model with native QSFP28 100GE physical interfaces and L2-3 support, 1RU chassis.

Known Issues List


Bug Number Notes
1538409 In rare instances, a 50G link may initialize so as to show a slow rate of RX CRC or RX PCS errors. Workaround is to perform a Simulated Cable Disconnect and reconnect to bring port down and then back up. Please use CA-N or AWG 26 cables for best results.

Getting Started Guide

Bug Number Notes
1544025 The Layer 1 specifications for 50GE in Getting Started Guide incorrectly state that 50GE supports Auto-negotiation and Link Training. UHD100T32 supports IEEE 25GE and 50GE (not Consortium). 50GE IEEE does not support Auto-negotiation or Link Training. Only Consortium support these.
1544029 The procedure to sign into UHD100T32 from a Serial Connection is missing a step. After first signing in with admin/admin credentials, you will be prompted to sign in with the word 'console'. After about a minute a new login prompt will appear. Then sign in as admin/admin credentials to enter the admin shell.


Bug Number Notes
1543625 Specific frame size mixes with a large percentage of frames over 3K bytes and containing three or more frame sizes may not reach line rate


Bug Number Notes
1543740 Tier 2 Subscription users: When choosing license level, change the subscription mode from the default Mixed to Subscription. This is due to a GUI bug when selecting subscription licenses.


Bug Number Notes
1543741 When performing a Diagnostics dump, user must refresh the UI. Dump completion does not cause auto-refresh.


Bug Number Notes
1537394 For 25G/50G ports the difference between the desired and measured transmit rate may be as large as 0.15% of line rate
1542836 For packet encapsulations of more that 2 headers, line rate may not be achieved for very small packet sizes.


Bug Number Notes
1538645 Existing PortMapAssistant() module of RestPY will not work with UHD port style notations. Please use AssignPorts API or look at the current sample script for UHD in Openixia.com.


Bug Number Notes
1531257 Sometimes after stopping traffic if you leave the test untouched for 180+ seconds, the tx statistics will vanish from all traffic statistics and an error will be thrown as hardware desync detected. You will be able to start the traffic without any issue next time.
1539157 When running 64B traffic at line rate with a single 25G/10G port pair, the real time traffic delta may be positive. This delta will be zero once traffic stops given there is no loss in the DUT.
1542413 In traffic scenarios with small burst sizes, and occasionally in long duration scenarios, there is a possibility of seeing blank statistics after traffic is stopped. If this is experienced, recommendation is to enable run-time Stat CSV logging while test is in progress.
1543717 In some rare occasions the latency numbers reported may be very high, clearing statistics will reset them to correct value.


Bug Number Notes
1542882 If links are down after switching into an invalid speed mode for a transceiver, that transceiver may need to be removed and inserted back.

Web UI

Bug Number Notes
1532663 Using UHD UI at the same time a script is being run on the same session may show inconsistent UI. Workaround is to wait for the script to finish and refresh the web browser.
1538537 In some high port count cases UHD web application may get into a bad state on repeated open/close of sessions. In such cases workaround is to close and reopen a new session.
1539836 Creating a topology while a test is running is not supported
1541051 Sometimes, application requires a web browser refresh to show correct number of protocols in the current configuration
1544005 After loading a config with ports assigned, user needs to wait for 2 mins before starting the protocols. If user starts protocols before 2 mins then a harmless error will be thrown.