How Do I Install, Configure, and Use IBM Network
Performance Insight, V1.2.1
Table of Contents
How Do I Install, Configure, and Use IBM Network Performance Insight, V1.2.1 ........................................ 1
Table of Contents .......................................................................................................................................... 1
Introduction .................................................................................................................................................. 2
Compatibility with Netcool Operations Insight: ........................................................................................... 4
Before you begin ........................................................................................................................................... 4
Part numbers for the required software ...................................................................................................... 5
Install the prerequisite software................................................................................................................... 6
Installation and configuration of ITNM............................................................................................ 6
Prepare to install NPI and related software ................................................................................................. 7
Download IOP packages................................................................................................................... 7
Download and extract NPI software ................................................................................................ 7
Set up SSH Passwordless login ......................................................................................................... 8
Prepare to run prerequisite scanner................................................................................................ 8
Set Kernel parameters ..................................................................................................................... 8
Install NPI ...................................................................................................................................................... 9
Set up NPI cluster on Ambari ........................................................................................................................ 9
Set up integration with JazzSM ................................................................................................................... 18
Generate the certificate and keystore files ................................................................................... 19
Enable integration with JazzSM ..................................................................................................... 19
Setting up communication with JazzSM on Ambari ...................................................................... 21
Configure SSL communication for integration ............................................................................... 22
Configure SSL settings on WebSphere Application Server ............................................... 22
Add the signer certificate to your browser ....................................................................... 23
Post installation tasks ................................................................................................................................. 24
Verify NPI installation .................................................................................................................... 25
Install and configure Device Dashboard ..................................................................................................... 26
Configure Apache Storm Spout in Network Manager ................................................................... 27
Configure NPI system .................................................................................................................................. 27
Troubleshooting .......................................................................................................................................... 28
Introduction
Use this fast path check lists to track the tasks to prepare your environment, install, configure, and use
IBM Network Performance Insight (NPI), V1.2.1 from your NOI solution. You can print out this check list.
Attention: Network Performance Insight is available as part of IBM® Netcool® Operations Insight (NOI)
solution only.
Note: This information complements the official documents that are available on IBM Knowledge Center
here:
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/npi_kc_welcome.html
See the videos for installing and configuring NPI 1.2.1 from here:
https://tnpmsupport.persistentsys.com/all-videos-npi
Download the PDF versions of NPI documentation from here:
https://tnpmsupport.persistentsys.com/documentation-npi
The infographic below shows a bird's-eye-view of the tasks that are needed for installation,
configuration, and integration of Network Performance Insight with IBM Tivoli Network Manager, and
OMNIbus components of NOI.
All these steps are needed for visualization of traffic data from Tivoli Netcool/OMNIbus Web GUI and
Device dashboard.
For system requirements, see here:
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/requirements/ctnpm_requirements.ht
ml
Compatibility with Netcool Operations Insight:
Network Performance
Insight Version
Netcool Operations Insight
version
Integrated Product Versions
1.2.1
1.4.1





Tivoli Network Manager 4.2.0.3
Tivoli Netcool/OMNIbus Core 8.1.0.11
Tivoli Netcool/OMNIbus Web GUI 8.1.0.9
Device Dashboard 1.1.0.2
Network Health Dashboard 4.2.0.3
Before you begin

Keep the following information ready before you start the installation:
o
The fully qualified domain name (FQDN) for each host in your system, and the components
that you want to set up on different hosts. The Ambari installation wizard does not support
IP addresses. Use hostname -f to check for the FQDN.
An example for FQDN:
<myserver.ibm.com>
For more information about the supported host name values on WebSphere Application
Server, see:
https://www.ibm.com/support/knowledgecenter/SSEQTP_8.5.5/com.ibm.websphere.base.
doc/ae/rins_hostname.html
o The base directories for the following components:
Parameter
NameNode
DataNodes
MapReduce
ZooKeeper
Your value
Various log, pid, and database
files according to your
installation type
o
Users for Network Performance Insight:
Parameter
Description
root
Installs NPI and deploys the clusters.
netcool
The netcool user is created during Network Performance Insight
installation and all Network Performance Insight services are run as
netcool user.
Admin user to login to JazzSM
smadmin
o
Default ports to be opened for a typical installation
o
Some URLs you can use to troubleshoot NPI and Ambari components
Component
URL
Ambari
http://<myserver.ibm.com>:8080
Hadoop
hdfs:// <myserver.ibm.com>:9000
Hadoop Applications
http:// <myserver.ibm.com>:8088/cluster
Hadoop UI
http:// <myserver.ibm.com>:50070
Part numbers for the required software
Component description
Part no.
Netcool Operations Insight - Performance Management
V1.2.1 Linux Multilingual
CNK2QML
Netcool Operations Insight - Performance Management
Quick Start Guide V1.2.1 Multilingual
CNK2RML
IBM Tivoli Network Manager IP Edition v4.2.0.3
CJ1J5EN
IBM Tivoli Netcool/OMNIbus v8.1 for Netcool Operations
Insight v1.4
CRYX7EN
Component description
Part no.
Jazz for Service Management v1.1.3 for Tivoli
Netcool/OMNIbus, Network Manager, and Netcool
Configuration Manager with Cumulative Patch 1
CJ0R8ML
WebSphere Application Server V8.5.5.9, or later
CNC1ZML
Network Health Dashboard v4.2.0.3 for Netcool Operations
Insight
CJ0S2EN
Device Dashboard v1.1.0.2 for Netcool Operations Insight
CJ1U2EN
For part numbers of other NOI components, see Download IBM Netcool Operations Insight V1.4.1.
Install the prerequisite software
Important: These steps are not required if you have already installed JazzSM and ITNM as a part of your
NOI solution.
You require the following components from IBM Tivoli Netcool Operations Insight to solution to work
with NPI:



IBM Tivoli Network Manager
IBM Tivoli Netcool/OMNIbus
IBM Tivoli Netcool Operations Insight Device Dashboard
Follow these steps to install the prerequisite software from NOI solution to work with NPI:
Installation and configuration of ITNM
Install the following ITNM components that you are entitled to as part of NOI solution. As a best
practice, install the components one by one in the order that is specified here:



Install and configure IBM Installation Manager
Install and configure Tivoli Netcool/OMNIbus
Install Dashboard Application Services Hub
Note: Tivoli Common Reporting is not required for working with Network Performance Insight.
JazzSM 1.1.3.0 component versions:

DASH: 3.1.3.0

WebSphere Application Server: 8.5.5.9
a. Perform a full installation or upgrade installation.
Note: Security Services are required for integration with ITNM. It is installed automatically when
you install the Device Dashboard.

Install Tivoli Netcool/OMNIbus Web GUI




Prepare the database for ITNM.
o Install supported database (DB2/Oracle) for ITNM
o Install and run the database scripts to configure the topology database for use by
Network Manager.
Install the Network Manager core components
Install Network Manager GUI components
Install Network Health Dashboard
For more information about these steps, see Quick Reference to Installing in NOI documentation from
IBM Knowledge Center.
o
o
Configure your ITNM environment.
Activate the SLA agent if you want to discover the SNMP data from Cisco IP SLA enabled devices.
Prepare to install NPI and related software
Perform these tasks before you install NPI
Download IOP packages
o
IBM Open Platform with Apache Spark and Apache Hadoop packages:
o
o
o
ambari-2.2.0.el7.x86_64.tar.gz
iop-4.2.0.el7.x86_64.tar.gz
iop-utils-1.2.1.0.el7.x86_64.tar.gz
Download and extract NPI software
Task
Description
Check
Download the eImage for NPI.
Download from Passport
Advantage web site to a
location of your choice. For
example:
☐
/opt/IBM/Installers/NPI
Let us refer to this directory
as <DIST_DIR>.
Extract the media.
Use the following commands:
tar -zxvf CNK2QML.tgz
tar -zxvf NPI-.2.1.0.tgz
☐
Set up SSH Passwordless login
Task
Description
Check
On the Ambari server, generate the
public and private SSH keys.
Run the following commands:
☐
Enter the required details of the
Ambari agent host at the prompts
Always give fully qualified domain names.
☐
Repeat this for all the agents in
your cluster
This is to make sure that the Ambari server
can connect to each Ambari agent without
specific passwords.
☐
cd <DIST_DIR>/NPI-1.2.1.0/bin
./setup_cluster_ssh.sh
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/install/tnpi_setup_ssh_password_less_
login.html
Prepare to run prerequisite scanner
For more information about these tasks, see “Preparing your environment” in BigInsights documentation
on IBM Knowledge Center from here.
Note: /NPI-1.2.1.0/bin/prereq_check.sh script is automatically run when the NPI installer script
is called.
Set Kernel parameters
Task
Description
Check
Edit the /etc/sysctl.conf file
and the lines.
As root user, add the following lines:
☐
net.core.rmem_default = 33554432
net.core.rmem_max = 33554432
net.core.netdev_max_backlog = 10000
Change /etc/sysctl.conf to ensure that
the values are set on a system start.
Run sysctl –p as root user.
This will refresh the new configuration in the
current environment.
☐
Edit the
netcool hard nofile 20000
netcool soft nofile 20000
☐
/etc/security/limits.conf
file to add or modify the hard
and soft limit.
Log out and log in to the session
again as root user for the
changes to take effect.
☐
Repeat these steps on all the
servers where Network
Performance Insight services are
installed.
☐
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/install/tnpi_ulimit_settings.html
Install NPI
Use these steps to install and configure NPI services and IOP components. Check the tasks that you have
completed.
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/install/tnpi_installing.html
Before you begin:
o
o
o
Ensure that Jazz™ for Service Management is installed.
Ensure that the necessary user permissions are in place for all the installation directories.
Ensure that all the hosts in your cluster are in the same time zone.
Task
Description
Run the installer as root user. The
default installation directory is
cd <DIST_DIR>/NPI_1.2.1.0/bin
./install.sh <DIST_DIR>
Check
☐
/opt/IBM/npi.
Check installation output in the
following log files that are located in:
install_<timestamp>.log
prereq_check_<timestamp>.log
☐
/<DIST_DIR>/NPI_1.2.1.0
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/install/tnpi_performing_installation.ht
ml
Set up NPI cluster on Ambari
You can set up NPI clusters on Ambari web interface, configure the IOP components, NPI services, and
NOI components.
Use the Ambari installation wizard in your browser to complete your installation, configuration, and
deployment of Network Performance Insight components and Hadoop components in your cluster.
Task
Description
Check
Login to the Ambari
server web interface.
Use admin/admin
credentials.
For example:
☐
http://<myserver.ibm.com>:8080
☐
Click Launch Install
Wizard on the Ambari
Welcome page.
Enter the name of the
cluster on “Get Started”
page. It can be any
meaningful name of
your choice.
Select BigInsights 4.2
NPI on “Select Stack”
page and Next.
The name cannot contain blank spaces or special characters.
☐
☐
Complete the steps on
the “Install Options”
page:
o
☐
List all the nodes in
your cluster in the
Target Hosts field.
Specify FQDN, one
node per line.
o Select Provide your
SSH Private Key to
automatically
register hosts.
Browse to the
<root>/.ssh/id_
rsa file to see the
file contents
updated. Or, copy
the contents of the
<root>/ .ssh/id
_rsa file and paste
o
the contents in the
SSH key field
Click Register and
Confirm.
Verify the hosts in
“Confirm Hosts” page.
You can see the
progress.
☐
Check the services to
install in your cluster
and click Next on the
“Choose Services” page.
☐
Assign the master
services to hosts in your
cluster on the “Assign
Masters” page and click
Next.
☐
Assign the slave and
client components to
hosts in your cluster on
the “Assign Masters”
page and click Next.
☐
Update the
configuration settings
on the “Customize
Services” page.
Yarn settings:
☐
YARN > Settings
Note: Default values are
completed
automatically when
available and they are
the recommended
values.
HDFS settings:
HDFS > Settings
☐
Zookeeper settings:
Zookeeper > Zookeeper Server
Note: Do not set the ZooKeeper directory in /tmp directory.
Kafka settings:
Kafka > Kafka Broker
☐
NPI services settings:
☐
NPI > NPI Settings
Typically, you do not need to change the defult settings that
are auto-populated for need to change for NPI Common,
NPI Manager, NPI DNS Service, and NPI Web Services
settings.
Optionally, you can set the
collector.flow.exporter.blacklist as shown below
to provide a comma-separated list of IP addresses in square
brackets. The flow data from these exporters in the list is
blocked from further processing. Also, make sure to open
the UDP port, 4379 on all the flow-enabled devices that are
sending data to the NPI Collector.
ITNM settings:
NPI > NOI Core Settings > NOI Components > NOI SNMP
Collector
Change as per your database.
☐
OMNIbus settings:
Typically, no need to change. The default settings are
autopopulated.
Make sure that the following tasks are done:

Configure the host name resolution to resolve
omnihost to the actual host name where Tivoli®
☐
Netcool/OMNIbus is installed. Add an alias entry in
the /etc/hosts file in your NPI server as follows:
<IP_Address>
<OMNIbus_server_fully_qualified_host_name>
<OMNIbus_server_short_host_name> omnihost
For example:
10.55.237.105
omnihost

myserver.ibm.com
myserver
Ensure that you have the following 32-bit RHEL
operating system libraries:
o
o
o
o
zlib
ncurses
bzip2
libstdc++
Review and deploy.
☐
1. Review the completed
tasks on
the “Summary” page
and click Complete.
☐
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/install/tnpi_installing_clusters.html
Set up integration with JazzSM
Use this information to set up the federation between Jazz™ for Service Management and Network
Performance Insight to work correctly and to access the web-based visualizations.
Generate the certificate and keystore files
Task
Description
Check
Generate ca.crt key
store file by using the
following command in a
single line
as root user:
cd /opt/IBM/npi/npi-installer-tools/dashintegration
<DASH_INTEGRATION_PATH>/securityKeyTool.sh
default=<DASH_INTEGRATION_PATH>/default.cfg
-custom=<DASH_INTEGRATION_PATH>/custom.cfg
☐
Check these log files in
the /tmp directory for
any errors:
/opt/IBM/npi/npi-installer-tools/dashintegration/securityKeyTool.sh default=/opt/IBM/npi/npi-installertools/dash-integration/default.cfg custom=/opt/IBM/npi/npi-installertools/dash-integration/custom.cfg
 ambari_npi_key_startup.log
 securityKeyTool.<timestamp>.log
 genSecurityKey.log
For example:
☐
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/configure/tnpi_configure_jazzsm_after
_npi_installation.html
Enable integration with JazzSM
Task
Description
Check
☐
Make sure that Tivoli®
Netcool/OMNIbus Objec
t Server is up and
running.
Update these fields in
the file custom.cfg file
that are specific to
the Dashboard
Application Services
Hub instance that you
want to use for
integration.
#-- Ambari Server Port, default 8080--#
By default,
the custom.cfg file is
DASH_CONNECTION=root@<myserver.ibm.com>
AMBARI_SERVER_PORT=8080
# Directory where npi-installer-tools are
installed.
NPI_INSTALLER_TOOLS_DIR=/opt/IBM/npi/npiinstaller-tools
DASH_ENABLE_OPTION=TRUE
☐
located
in /opt/IBM/npi/npi
-installertools/dashintegration folder.
DASH_SSH_PORT=22
WEBSPHERE_APP_SERVER_PATH=/opt/IBM/WebSphe
re/AppServer/
JAZZSM_PATH=/opt/IBM/JazzSM
DASH_USERNAME=smadmin
DASH_PASSWORD=netcool
KEYSTORE_OPTION=USE_DEFAULT_KEY
EXIST_KEYSTORE_FILEPATH=/tmp/security.keys
tore
EXIST_CA_FILEPATH=/tmp/ca.crt
KEYSTORE_PASSWORD=changeit
KEY_PASSWORD=changeit
ALIAS=npi
DOMAIN_NAME=*.persistent.co.in
ORG_NAME=PSL
LOCALITY=UT
STATE=SL
COUNTRY=MY
Run the integration
script that is located
in /opt/IBM/npi/npi
-installertools/dashintegration folder.
as root user.
#
<DASH_INTEGRATION_PATH>/npiDashIntegration
.sh default=<DASH_INTEGRATION_PATH>/default.cf
g custom=<DASH_INTEGRATION_PATH>/custom.cfg
☐
For example:
cd /opt/IBM/npi/npi-installer-tools/dashintegration
/opt/IBM/npi/npi-installer-tools/dashintegration/npiDashIntegration.sh default=/opt/IBM/npi/npi-installertools/dash-integration/default.cfg custom=/opt/IBM/npi/npi-installertools/dash-integration/custom.cfg
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/install/tnpi_enable_integration_with_j
azzsm.html
Setting up communication with JazzSM on Ambari
Task
Description
Check
Login to the Ambari
server web interface.
Use admin/admin
credentials.
For example:
☐
Update the NOI Services
settings
Services > NPI > Configs > NOI Core Settings > NOI
Services
http://<myserver.ibm.com>:8080
☐
Update the NPI
Advanced settings
Services > NPI > Configs > Advanced > Advanced npiauth
☐
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/install/tnpi_customize_npi_settings.ht
ml
Configure SSL communication for integration
To establish secure communications, a certificate and an SSL configuration must be specified for the
endpoint.
You must configure the SSL one time only. If you are reinstalling or upgrading Network Performance
Insight, back up the security.keystore and priv_key.key, which are the private keys, and
ca.crt, which is the public key if you plan to reuse them.
Perform the following tasks to achieve this:


Configure SSL settings on WebSphere Application Server
Add the signer certificate to your browser
Configure SSL settings on WebSphere Application Server
Task
Description
Check
Log in to JazzSM as
administrator user.
☐
Click Console Settings >
Websphere
Administrative Console
and click Launch
Websphere
administrative console
☐
Click Security > SSL
certificate and key
management.
☐
Click SSL configurations >
NodeDefaultSSLSettings
from the list of Secure
Socket Layer (SSL)
configurations and
change the alias to
netcool.
☐
Click OK and save.
Restart the WebSphere
Application Server.
The signer certificate information is displayed.
☐
☐
Press y in the SSL Signer
Prompt window.
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/configure/tnpi_setting_ssl_configurati
ons.html
Add the signer certificate to your browser
The ca.crt file that is extracted from Jazz™ for Service Management must be imported to browser’s
Trusted CA Certificate store.
This task must be done on all computers that access Network Performance Insight data for visualization.
These steps differ on different browsers. Instructions are provided for Internet Explorer and Firefox.
Task
Description
Check
Go to NPI installation directory.
/opt/IBM/npi/installertools
☐
Copy the ca.crt signer
certificate that was generated
earlier to your local machine.
☐
Import the certificate to the
browser on your local machine.
For Firefox:
☐
A. Click Tools > Options
B. Click Advanced >
Certificates > View
Certificates
C. Click Authorities >
Import
D. Browse to the location
of the exported ca.crt
file and click Open.
E. Select all the check
boxes on the
Downloading Certificate
page and click OK.
F. Click OK to close the
window.
For IE:
A. Click Tools > Internet
Options.
B. Click Content >
Certificates > Trusted
Root Certification
Authorities.
C. Click Import.
D. Browse to the location
of the exported
ca.crt file.
E. Click Next.
F. Select to place the
certificates in Trusted
Root Certification
G. Authorities option and
click Finish.
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/configure/tnpi_add_root_certificate_t
o_browser.html
Post installation tasks
Perform these post installation tasks after the installation of Network Performance Insight is complete.

To make sure that all the services start automatically when the Ambari server host is restarted,
run the following command as root user on the Ambari server host:
unlink /etc/rc.d/init.d/ambari-server
cp -a /usr/sbin/ambari-server /etc/rc.d/init.d/ambari-server &&
systemctl daemon-reload

Copy the conf.key file from Tivoli® Network
Manager ($NCHOME/etc/security/keys directory) to Network Performance Insight
(/opt/IBM/npi/npi-itnm-collector/resources/itnm/security/keys directory).
cd /opt/IBM/npi/npi-itnm-collector/
mkdir -p resources/itnm/security/keys

If you have previously disabled firewall, enable the firewall on all nodes in your cluster. Use these
commands:
systemctl start firewalld.service
systemctl enable firewalld
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/install/cnpi_post_installation_task
s.html
Verify NPI installation
Task
Description
Check
Verify the installation logs
that are available at /tmp
directory.
List all the logs using the following
command:
☐
ls -lrt /tmp/*.log
You can see the following log files:
install_201607121342.log
test_install_main.log
apr_install.log
apr_util_install.log
httpd_install.log
iop_http_repos.log
iop_utils_http_repos.log
ambari_http_repos.log
npi_http_repos.log
setupRepoServer.log
ambari_repo_baseurl.log
postgresql_libs_install.log
postgresql_core_install.log
postgresql_server_install.log
ambari_server_install.log
ambari_server_setup.log
ambari_server_start.log
setupAmbari.log
ambari_npi_startup.log
setupNpiServiceStack.log
dashkey.log
npiDashIntegration.log
setupGenKeyTool.log
ambari_npi_key_startup.log
DASH integration script execution log file
is located here:
<DASH_Host>/tmp/enableDash.log
On Ambari Server:
/tmp/npiDashIntegration.log
Logs for all services can be seen as follows:
Parameter
Description
Ambari services
You can find the Ambari service directories in
/usr/iop/current
The logs for each service can be found in
/var/log/<service>
NPI services
You can find the NPI services in
/opt/IBM/npi/<NPI_Service>
The logs for each service can be found in:
/opt/IBM/npi/logs/<NPI_Service>
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/install/tnpi_verifying_installation.html
Install and configure Device Dashboard
Perform the following task:
Task
Description
Check
Install and configure Device
Dashboard
To integrate with Network
Performance Insight and use
the Device Dashboard to view
performance information about
your network, you need to
configure the dashboard. For
more information, see here.
☐
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/noi_integ/tnpi_noi_integ_configure_n
pi_console_integrationon_jsm.html
Configure Apache Storm Spout in Network Manager
Configure integration with Network Performance Insight to enable Network Manager to share poll data
with Network Performance Insight. For more information, see here
Configure Storm Spout in Tivoli Network Manager to work with Network Performance Insight. Ensure
that the Ambari host that has Kafka Broker installed is up and running.
Configure NPI system
Important: Ensure that you have installed the Device Dashboard before proceeding to configure your
NPI system. Only after you install and configure the Device Dashboard, you can see the Console
Integration (Snowflake) icon.
Configure your Network Performance Insight system that is integrated with Dashboard Application
Services Hub from the graphical user interface.
You can configure the following items from system configuration for Flow-specific data:




Interfaces
Thresholds
Domain names
Retention profiles
Task
Description
☐
Login to JazzSM as
npiadmin/netcool and
navigate to Console Integration.
Enabling flow interfaces
Check
Click Console Integration icon > Interfaces
under System configuration.
☐
Select an interface and click Edit to
enable or disable an interface.
Configure domain names
Click Console Integration icon > Domain
Names under System configuration.
Click the New icon and enter the domain
name to resolve.
☐
You can also delete an existing domain
name.
Configure the retention profiles
Click Console Integration icon > Retention
Profiles under System configuration.
☐
Select an interface and click Edit to
configure the retention profile period for
an Interface.
https://www.ibm.com/support/knowledgecenter/SSCVHB_1.2.1/traffic_overview/cnpi_configuration_tr
affic_overview.html
Troubleshooting
Use this information to troubleshoot a problem with Network Performance Insight.
A list of known problems and their solutions for NPI 1.2.1 and NOI 1.4.1:
Known problems and solutions in NPI 1.2.1
Known problems in NOI 1.4.1
Use the forums for any queries you might have and out team will respond ASAP:
https://www.ibm.com/developerworks/community/groups/service/html/communityoverview?com
munityUuid=eaa9489e-3122-440a-93a3ee5cd204c603#fullpageWidgetId=W4c848ec1a7b8_4c41_80dd_0e4ddf24975c