ASR9K VLL configuration failed to create/delete by netconf-yang

Trying to use netconf-yang to provision production system ASR9K, when they try following configuration, three problem met. Want to check if ASR9K/IOS-XR support these configuration on yang model now.

Problem-1: does “service-policy” supported by YDK-API in IOS-XR 6.0.1.

Customer use YDK-Py sandbox to get VLL(VPWS) running configuration of ASR9K, the result is most of configuration could be successfully obtain except “service-policy input/output”, is it supported now., if not, roadmap. 

<ASR9K CLI command>  

interface Bundle-Ether10001.100 l2transport

description "Leaseline_Number--10013--20M/5M"

encapsulation dot1q 100

rewrite ingress tag pop 1 symmetric

mtu 1580

bundle load-balancing hash auto

service-policy input eco-x

service-policy output eco-x

! 

l2vpn

xconnect group eco

  p2p 10013

   interface Bundle-Ether10001.100

   neighbor ipv4 172.16.20.1 pw-id 10013

    pw-class control-word

   !

   description "Leaseline_Number--10013--20M/5M"

  !

! 

YDK-Py polling result:  (Removed..)

<YDK netconfservice.get_config>

:

Problem-2: continue the problem-1, while using YDK API to create a VLL circuit configuration. However, when the “p2p-description” was removed, the configuration could be created successfully without error. want to  know the reason, 

  <?xml version="1.0"?>

<rpc-reply message-id="urn:uuid:eb2cb296-4d50-11e6-b485-08002722cb22" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">

<rpc-error>

  <error-type>protocol</error-type>

  <error-tag>bad-element</error-tag>

  <error-severity>error</error-severity>

  <error-path xmlns:ns1="http://cisco.com/ns/yang/Cisco-IOS-XR-l2vpn-cfg">ns1:l2vpn/ns1:database/ns1:xconnect-groups/ns1:xconnect-group[name = 'hinet-eco']/ns1:p2p-xconnects/ns1:p2p-xconnect[name = '10015']/ns1:p2p-description</error-path>

  <error-info>

   <bad-element>p2p-description</bad-element>

  </error-info>

</rpc-error>

</rpc-reply>  

Problem-3 : Can not delete VLL circuit configuration by using netconf-yang

*** follows are example configuration of VLL circuit.(Removed)

 *** use the “problem3-Fail-nc-delete-p2p-ydk.py” to delete the “p2p 10016” circuit, the result was failed and got following error message:

 vagrant@ydk-py:models$ ./Fail-nc-delete-p2p-ydk.py -v ssh://cisco:cisco@172.20.10.7

2016-07-21 08:13:28,611 - ydk.providers.NetconfServiceProvider - INFO - NetconfServiceProvider connected to 172.20.10.7:None using ssh

Traceback (most recent call last):

  File "./Fail-nc-delete-p2p-ydk.py", line 91, in <module>

    crud.delete(provider, l2vpn.database.xconnect_groups.xconnect_group.p2p_xconnects.p2p_xconnect)

AttributeError: 'YList' object has no attribute 'p2p_xconnects'

vagrant@ydk-py:models$

 *** use the problem3-nc-delete-xc-group-ydk.py to delete whole xconnect group “hinet-eco”, the result is successful. 

For problem 1, The service policy statement is not supported in XR 6.0.1, but will be in XR 6.1.1.

For problem 2, The regex for p2p-description leaf is "[\w\-\.:,_@#%$\+=\|;]+" (link for YANG model), so it is not compatible with value "\"223Y1006--10016--20M/5M\"", maybe it could be changed to some other value? Such as "223Y1006--10016--20M|5M".

For problem 3,The way to delete a list instance is to create an instance and extend the parent's list with it. There is an example here. Hope this helps.