topic Re: NETCONF operational data example in Network Devices

NETCONF operational data example

Dave Phillips — Thu, 17 Jan 2019 23:58:21 GMT

Hello, I have been trying to get my head around using NETCONF/YANG with IOS-XE. I am particularly interested in polling data. I have enabled Cisco ODM on my device and I show polling is set up. My question is, how to I get to this data via a RPC call? I cannot find any examples anywhere.

They documentation states this: After operational data polling is enabled, send a <get> RPC to obtain the operational data. Use the parser-to-YANG model mapping to determine which operational YANG model should be used to retrieve the operational data.

I am unsure what or how to use a parser-to-YANG model mapping. Any tips would be appreciated.

Thanks

Dave P

Re: NETCONF operational data example

Mamdouh Elgamal — Fri, 18 Jan 2019 17:57:07 GMT

This doesn't directly answer your question, but I would recommend using yang-explorer to find out the rpc message being sent to the router. This will help you understand how to translate that to python code etc later on if you are writing a script.

i'm assuming you have a yang file that models the information you are trying to query, load up the yang file to

yang-explorer, then generate/send an rpc call from yang explorer to any endpoint running IOS XE.

i found it to be very helpful, below is the install link.

https://github.com/CiscoDevNet/yang-explorer

Re: NETCONF operational data example

Dave Phillips — Fri, 18 Jan 2019 22:27:09 GMT

Thanks. I have been using Yang-Explorer. Unfortunately I haven't had a lot of luck yet. I just get back empty data sets. ODM polling is enabled and i can get a list of what it is polling, just not sure how to get that stats.

Re: NETCONF operational data example

Dave Phillips — Tue, 22 Jan 2019 18:54:47 GMT

Just to follow up. I believe I figured out the RPC call for the information I am trying to get. The switches just do not return any data. I am trying to get the mac-address-table. I have verified polling is enabled for this parser. I have tried on 2 different platforms: 4500-X running 3.9.2 and a 3650-X running 16.3.6.

Below is the RPC-GET and the reply

REPLY:

rpc-reply message-id="urn:uuid:666d06ae-aaa1-4bb4-b526-501a148fc088" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0">
<data/>
</rpc-reply>

Re: NETCONF operational data example

Mamdouh Elgamal — Wed, 23 Jan 2019 01:32:38 GMT

did you configure these commands on the switches ?

configure terminal
netconf-yang cisco-odm polling-enable
netconf-yang cisco-odm actions "insert operation name" 
mode poll

Re: NETCONF operational data example

Dave Phillips — Wed, 23 Jan 2019 17:36:14 GMT

Yes. Here is the running config on my switch. Getting the interface-state works, but not LLDP-state or the mac-address-table

netconf-yang cisco-odm actions parse.showInterfaces
polling-interval 12000
netconf-yang cisco-odm actions parse.showMacAddTable
polling-interval 12000
netconf-yang cisco-odm actions parse.showLLDPneighbors
polling-interval 12000
netconf-yang cisco-odm polling-enable
netconf-yang

Re: NETCONF operational data example

Mamdouh Elgamal — Wed, 23 Jan 2019 22:09:29 GMT

yeah, i getting the same result. when sending mac-address-table RPC.

testing on IOS XE 16.6 and ISR 4431

what yang model are you using ? to generate this RPC call

Re: NETCONF operational data example

Dave Phillips — Thu, 24 Jan 2019 17:17:14 GMT

I am using the cisco-mac-address-table yang model. I had to pull it off the switch as is doesn't seem to be available in the repos.

I am also using cisco-lldp-state for the lldp model.

Re: NETCONF operational data example

Mamdouh Elgamal — Thu, 24 Jan 2019 18:44:12 GMT

can you try using Cisco-IOS-XE-lldp-oper model

you can find it in the yangModels repo, download and unzip

https://github.com/YangModels/yang

under vendor/cisco/xe and pick version folder

see if you have any luck with that model in getting lldap information.

Re: NETCONF operational data example

Dave Phillips — Thu, 24 Jan 2019 19:14:02 GMT

Same empty reply.

<rpc-reply message-id="urn:uuid:2d67366f-d927-48d2-a375-8c8a6354c067" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0">
<data/>
</rpc-reply>

Re: NETCONF operational data example

Mamdouh Elgamal — Mon, 28 Jan 2019 15:45:21 GMT

I don't know what to try out next to be honest. I'm also new with using the yang models etc.

Re: NETCONF operational data example

Dave Phillips — Wed, 30 Jan 2019 00:21:10 GMT

Thanks for the help. I don't think getting state info from a device is 100% there yet.