Thank you for a great overview. FYI, I did encounter few problems for which I've noted the solutions below. 1. One needs to use switch `-x` to ignore yang version error 2. When using python virtual environment, export PYANG_XSLT_DIR=env/share/yang/xslt and export PYANG_RNG_LIBDIR=env/share/yang/schema
Hope you liked our video on YANG! Let me know what you think about the topic. Also, check out YANG Explorer - I forgot to mention it in the video. It's a great interactive tool that allows users to browse through YANG models in a very readable way github.com/CiscoDevNet/yang-explorer
How yang revisions are supported by yang libraries. AFAIK it is done by maintaining different file for each revision per module such as @.yang files. Any other information I can read about the same?
Hi ultra config, Can you please help me with this? I want the pattern in leaf to take only 2 strings as input. The strings are ["IPv4"] ["IPv6"] Along with the square brackets and quotations. If the address mentioned is ipv4 then they also should mention that they mentioned ipv4 as ["IPv4"] and for ipv6 also the same. So the pattern for this given is '((["IPv4"] | ["IPv6"]))' ; But this didn't work Also tried '(([\"IPv4\"] | [\"IPv6\"]))' ; this one is working but it is also taking all kinds of strings which is not the requirement so can you help in getting only ["IPv4"] and ["IPv6"] Thank you
ok now i have a tree that is based on a cisco xe. How can we put the pieces together in order to form a valid URI that we can use for example at postman???
Hi Oscar, check out our blog post linked in this comment where we construct a URI path for a RESTCONF request using the Cisco Native Interface YANG model. Once that example makes sense, check out YANG explorer too which has RESTCONF support. Over time, writing the URI paths will become very easy and can be done just by looking at the YANG model. ultraconfig.com.au/blog/restconf-tutorial-everything-you-need-to-know-about-restconf-in-2020/
Hey Rodrigo, I recommend Visual Studio Code for an editor. They have a plugin for displaying yang files well. You can still use pyang in Windows, you'll just have to install python first. Hope that helps!
Hi Zeenat, Sending sensor data might not be too applicable to YANG but I image it would be possible to build a YANG datastore on IOT devices for managing their configuration
@@ultraconfig9489 Thank you for replying.. I need help on how to send sensor data through SDN network... There was a plugin called iotdm for opendaylight but now I cannot build it anymore...could you help me please?
@@zeenatsyed2498 I haven't too much experience with OpenDaylight but you could try to reach out to the developers for resources github.com/orgs/opendaylight/people
Thank you for a great overview. FYI, I did encounter few problems for which I've noted the solutions below.
1. One needs to use switch `-x` to ignore yang version error
2. When using python virtual environment, export PYANG_XSLT_DIR=env/share/yang/xslt and export PYANG_RNG_LIBDIR=env/share/yang/schema
That's great Ashutosh, thanks for the valuable tips
Hope you liked our video on YANG! Let me know what you think about the topic.
Also, check out YANG Explorer - I forgot to mention it in the video. It's a great interactive tool that allows users to browse through YANG models in a very readable way github.com/CiscoDevNet/yang-explorer
Excellent tutorial!
Thank you for putting this together.
How yang revisions are supported by yang libraries. AFAIK it is done by maintaining different file for each revision per module such as @.yang files. Any other information I can read about the same?
Very good summary, thank you!
What a GREAT video!
This makes easy to understand, Thanks mate
Very well explained. Kudos !!
Thanks, can you please share the link of the written blog you are using for explanation
Thanks a lot for putting this together!
Hi ultra config,
Can you please help me with this?
I want the pattern in leaf to take only 2 strings as input.
The strings are
["IPv4"]
["IPv6"]
Along with the square brackets and quotations. If the address mentioned is ipv4 then they also should mention that they mentioned ipv4 as ["IPv4"] and for ipv6 also the same.
So the pattern for this given is
'((["IPv4"] | ["IPv6"]))' ;
But this didn't work
Also tried
'(([\"IPv4\"] | [\"IPv6\"]))' ; this one is working but it is also taking all kinds of strings which is not the requirement so can you help in getting only ["IPv4"] and ["IPv6"]
Thank you
Super clear.
Excellent video
Thank you, well explained !
Really amazing tutorial... demystified
Amazing video mate
Thanks Arjunan, I appreciate the feedback
hi. can i omit module-header in yang-module?
Can you pl give a tutorial of libyang also?
Hi Vishal. Good idea, we'll add it to our backlog of topics to cover
It will be lovely if you could perform a tutorial of libyang with Fedora 33 :)
ok now i have a tree that is based on a cisco xe. How can we put the pieces together in order to form a valid URI that we can use for example at postman???
Hi Oscar, check out our blog post linked in this comment where we construct a URI path for a RESTCONF request using the Cisco Native Interface YANG model. Once that example makes sense, check out YANG explorer too which has RESTCONF support. Over time, writing the URI paths will become very easy and can be done just by looking at the YANG model. ultraconfig.com.au/blog/restconf-tutorial-everything-you-need-to-know-about-restconf-in-2020/
Where did the IP addresses come from?
What does Key means under list?
Hi Nikhil, keys are used to uniquely identify an entry in a list. Check out section 7.8.2 in RFC 7950 for the full definition
Ultra Config, how can I validate a yang file in windows or save as file.yang? Or which editor can recognize a yang file? Thanks
Hey Rodrigo, I recommend Visual Studio Code for an editor. They have a plugin for displaying yang files well. You can still use pyang in Windows, you'll just have to install python first. Hope that helps!
@@ultraconfig9489 Ok :). I will use VSCode. I am working with YANG since a while. Thank you for you video!! Keep the spirit :)
@@Rodrigo_Bodhisava Will do :)
Is it possible to send iot sensor data using YANG or is only for network configuration?
Hi Zeenat, Sending sensor data might not be too applicable to YANG but I image it would be possible to build a YANG datastore on IOT devices for managing their configuration
@@ultraconfig9489 Thank you for replying.. I need help on how to send sensor data through SDN network... There was a plugin called iotdm for opendaylight but now I cannot build it anymore...could you help me please?
@@zeenatsyed2498 I haven't too much experience with OpenDaylight but you could try to reach out to the developers for resources github.com/orgs/opendaylight/people
nice video
👍
any solution ?
yang-tutorial % yang2dsdl -v data.xml ultraconfig-interfaces.yang
warning: failed to load external entity "/usr/local/share/yang/xslt/basename.xsl"
cannot parse /usr/local/share/yang/xslt/basename.xsl
== Generating RELAX NG schema './-data.rng'
warning: failed to load external entity "schema-dir"
cannot parse schema-dir