RDK Diagnostics

Description

This provides HTML diagnostic clients which can be used for Hybrid Gateway devices as well as IP clients. It also supports retrieving diagnostic values over a TR-069 interface for devices where snmp support is not present (IP client devices). Also additional diagnostic screens to monitor MOCA devices are available.
HTML based diagnostic screens will send a JSON request to the Lighttpd server. This request is converted to a corresponding SNMP trigger or a TR-69 request to retrieve the data and send it back as a JSON response to the HTML client.

Capabilities

• Handle HTTP gets from Diagnostics Application.
• Retrieve data from SNMP and/or TR-069 Clients.

Feature Summary

• Application access to SNMP MIB objects

• Application access to TR-069 parameters
• Application access to RDK state variables

Diagnostic Parameters (example)

State Variables

RDK will signal state variable transitions to application, and application will present the corresponding error messages to the user if necessary. 

Diagnostics using SNMP

A glance on SNMP

• Simple Network Management Protocol (SNMP) is an Internet-standard protocol for collecting and organizing information about managed devices on IP networks and for modifying that information to change device behaviour.
• SNMP is the opensource component which is integrated with RDK.
• “snmpd” is the snmp agent which is running in the box.
• All MIBS are available in /usr/share/snmp/mibs/

SNMP MIB 

• SNMP agents maintains a database describing the managed device  parameters. 

• Manager uses this database to request the agent to retrieve specific information and  further translates the information as needed for the network mangement system .

• Agent and Manager shares MIB

• MIBs comprises of managed object identified by the name Object Identifier (OID).

• SNMP mibs starts with 1.3.6.1.2.1

SNMP Diagnostics

• SNMP queries are used to fetch the details from the box which will be displayed in the “Diagnostics” page
• SNMP is used only in “hybrid” box types and not in client boxes.
• Client boxes use TR069 protocol for fetching diagnostic details.

Steps to display Diagnostics page in PC Browser 

• Step 1:

        Copy lighttpd config file from /etc to /opt

        cp /etc/lighttpd.conf /opt/

• Step 2 :

        Modify config file to show the page in browser.

               vi /opt/lighttpd.conf

        Comment below line

               server.bind                 = "127.0.0.1"

• Step 3:

        Execute below command

               ps -ef| grep "/usr/sbin/lighttpd" | grep -v "grep" | awk '{print $2}' | xargs kill -9 >& /dev/null;/usr/sbin/lighttpd -D -f /opt/lighttpd.conf &

• Step 4:

        Use below url in the browser to see diagnostics page

                http://<hybrid box lan ip address>:50050/htmldiag/summary_info.html

                eg: http://192.168.160.83:50050/htmldiag/summary_info.html 

   Note: Use TAB, SHIFT+TAB and ENTER keys to browse through this page

SNMP queries through command line

• SNMP queries can be executed command line to fetch the details
• Execute below  commands in the box console to see the output of the query

Example 1: Querying card binding status

 snmpwalk -OQ -v 2c -c public 127.0.0.1 OC-STB-HOST-MIB::ocStbHostCardBindingStatus.0

 Expected Output :

It shows that card is not authenticated for paid channels

Example 2: To check signal strength

    snmpwalk -v 2c -c public 127.0.0.1 OC-STB-HOST-MIB::ocStbHostInBandTunerTable

Example 3: For HDMI status returned by TV

snmpwalk -OQ -v 2c -c public 127.0.0.1 OC-STB-HOST-MIB::ocStbHostDVIHDMITable

Diagnostics using TR069

• TR069 queries are used to fetch the details from the box which will be displayed in the “Diagnostics” page
• TR069 is used only in “client” box types and not in hybrid boxes.
• Hybrid boxes use SNMP protocol for fetching diagnostic details.

Steps to display Diagnostics page in PC Browser 

• Step 1:

        Copy lighttpd config file from /etc to /opt

        cp /etc/lighttpd.conf /opt/

• Step 2 :

        Modify config file to show the page in browser.

               vi /opt/lighttpd.conf

        Comment below line

               server.bind                 = "127.0.0.1"

• Step 3:

        Execute below command

               ps -ef| grep "/usr/sbin/lighttpd" | grep -v "grep" | awk '{print $2}' | xargs kill -9 >& /dev/null;/usr/sbin/lighttpd -D -f /opt/lighttpd.conf &

• Step 4:

        Use below url in the browser to see diagnostics page

                http://<client box lan ip address>:50050/htmldiag/summary_info.html

                eg: http://192.168.160.34:50050/htmldiag/summary_info.html 

TR-069 queries through command line

• TR 060 queries can be executed command line to fetch the details using curl to query tr69Hostif

• Execute below  commands in the box console to see the output of the query

Example 1: To fetch number of entries in the HDMI table

 curl -d '{"paramList" : [{"name" : "Device.Services.STBService.1.Components.HDMI.1.Status"}]}' http://127.0.0.1:10999

Example 2: To fetch Human-readable name associated with this video decoder

 curl -d '{"paramList" : [{"name" : "Device.Services.STBService.1.Components.VideoDecoder.1.Name"}]}' http://127.0.0.1:10999

Example 3: To fetch the device total cpu usage

curl -d '{"paramList" : [{"name" : "Device.DeviceInfo.ProcessStatus.CPUUsage"}]}' http://127.0.0.1:10999

Steps to display Diagnostics page in PC Browser