Acquiring the YANG Model

The Yet Another Next Generation (YANG) models are stored on the device as part of the firmware package. In order to retrieve them the user must use a NETCONF tool, for instance:

• SSH console
• Tools from Cisco orchestrator (e.g.: Yang Explorer): https://github.com/CiscoDevNet/yang-explorer or Cisco YANG suite: https://github.com/CiscoDevNet/yangsuite
• Tools from MG-Soft (e.g.: MG Soft NETCONF Browser)

Basic SSH Console NETCONF Tool

For the most basic NETCONF tool, SSH console, YANG models can be acquired by sending specific requests.

To send the proper requests:

1. Connect Accedian NETCONF device by entering:
   ssh admin@10.230.111.130 -p 830 -s netconf

2. Send HELLO message to device by entering:
   < ?xml version="1.0" encoding="UTF-8"? >
   < hello xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" >
   < capabilities >
   < capability >urn:ietf:params:netconf:base:1.0< /capability>
   < /capabilities >
   < /hello >
   ]]>]]>

3. Send the request to acquire information regarding all available YANG schema by entering:
   < rpc message-id="101" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" >
   < get >
   < filter >
   < netconf-state xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-monitoring"
   < schemas/ >
   < /netconf-state >
   < /filter >
   < /get >
   < ]>]]>

4. Send the request to acquire a specific YANG schema, for example “accedian-alarm” model, by entering:
   < rpc message-id="101" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" >
   < get-schema xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-monitoring" >
   < identifier >accedian-alarm< /identifier >
   < version >2017-12-15< /version >
   < format >yang< /format >
   < /get-schema >
   < /rpc >
   ]]>]]>

5. Close the session by entering:
   < rpc message-id="101"
   xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" >< close-session/ >
   < /rpc >]]>]]>

Additional UI NETCONF Tools

For additional UI NETCONF tools (YANG Explorer, or MG Soft NETCONF browser), the Accedian device must be connected prior to running the corresponding built-in UI functions.

To acquire YANG models by using YANG Explorer:

1. The overview information regarding all YANG schemas on the device can be listed as shown below:
   

2. The request can be sent in order to get a specific YANG file. Note that the RPC created automatically by YANG Explorer will not work. The request must be customized by removing the lines that read < get > and < filter >.
   
   

3. YANG Explorer 0.8.0 (Beta) supports the functionality to download YANG files directly, but can be unstable.
   

To acquire YANG models by using YANG Suite:

1. Install Cisco YANG Suite: https://github.com/CiscoDevNet/yangsuite (Cisco YANG Suite document: https://developer.cisco.com/docs/yangsuite/ )

2. Access Docker via WEB browser:
   a. Login: http://localhost:8480/
   
   b. Create a new device profile and SSH session:
   
   
   c. Check the connection to profile created:
   
   d. Create defualt Repository and YANG set from profile created:
   
   e. Copy yand-files from: "/usr/share/yang"
   

f. Select YANG set from YANG repository:

g. Load modules and explore YANG models