bgp_oper error

• Want to READ just extended communities and networks from bgp_oper model. Nothing more. But facing some problem with vrf.vrf_name = READ() object. It works for one VRF if you put the name explicitly it doesn't work with READ() object.

The READ object can be used with non-key leafs. If you want to read only the networks under a BGP instance, please try the below: 

bgp = Cisco_IOS_XR_ipv4_bgp_oper.Bgp() 

instance = Cisco_IOS_XR_ipv4_bgp_oper.Bgp.Instances.Instance()

instance.instance_name = 'default' 

vrf = Cisco_IOS_XR_ipv4_bgp_oper.Bgp.Instances.Instance.InstanceActive.Vrfs.Vrf()

vrf.vrf_name = 'default' 

af = Cisco_IOS_XR_ipv4_bgp_oper.Bgp.Instances.Instance.InstanceActive.Vrfs.Vrf.Afs.Af()

af.af_name = Cisco_IOS_XR_ipv4_bgp_datatypes.BgpAddressFamilyEnum.ipv4_unicast 

network = Cisco_IOS_XR_ipv4_bgp_oper.Bgp.Instances.Instance.InstanceActive.Vrfs.Vrf.Afs.Af.Networks.Network()

af.networks.network.append(network)

vrf.afs.af.append(af)

instance.instance_active.vrfs.vrf.append(vrf)

bgp.instances.instance.append(instance) 

bgp_networks = crud.read(provider, network)

• same error also with network object for vrf default. Could be due to common_attributes was part of network object too.

Traceback (most recent call last):

  File "CAD/bgp_oper.py", line 42, in <module>

    bgp_routes = crud.read(provider, network)

  File "/usr/local/lib/python3.5/dist-packages/ydk/services/crud_service.py", line 150, in read

    payload = self._execute_crud_operation_on_provider(provider, read_filter, 'READ', only_config)

  File "/usr/local/lib/python3.5/dist-packages/ydk/services/crud_service.py", line 167, in _execute_crud_operation_on_provider

    operation

 --------------------------------------------

ydk.errors.YPYServiceProviderError: Server rejected request.

error-type: application

error-tag: operation-failed

error-severity: error

error-path: ns1:bgp/ns1:instances/ns1:instance[instance-name = 'default']/ns1:instance-active/ns1:vrfs/ns1:vrf[vrf-name = 'default']/ns1:afs/ns1:af[af-name = 'ipv4-unicast']/ns1:networks/ns1:network

error-message: 'YANG framework' detected the 'fatal' condition 'Operation failed'

OK. Are you able to run a <get> RPC for the same data using netconf. If so do you have the XML snippet for this.

You're using ncclient correctly (BTW, suggest that you may want to take a look at GitHub - CiscoDevNet/ncc: ncclient scripts and helpers; the script ncc.py provides a way to work with "snippets" of lower-level XML config) 

However, the request may not be quite correct. The form you have used only asks the platform to return the element <vrf-name>. Can you instead try something like: 

                    <bgp xmlns="http://cisco.com/ns/yang/Cisco-IOS-XR-ipv4-bgp-oper">

                        <instances>

                            <instance>

                                <instance-active>

                                    <vrfs>

                                        <vrf>

                                            <afs>

                                              <af>

                                                <networks>

                                                  <network>

                                                    <network/>

                                                  </network>

                                                </networks>

                                              </af>

                                            </afs>

                                        </vrf>

                                    </vrfs>

                                </instance-active>

                            </instance>

                        </instances>

                    </bgp> 

This should return the inet:ip-prefix for all AFs and networks under all VRFs.

Currently, YDK does not support read filters for nested lists with no keys. We only support not providing the key for the deepest list in the nested hierarchy. We will be adding support for this in the future. This issue is tracking it.

This is the test code 

#!/usr/bin/env python

from ydk.services import CRUDService, CodecService, NetconfService, Datastore
from ydk.providers import CodecServiceProvider, NetconfServiceProvider
from ydk.models.cisco_ios_xr import Cisco_IOS_XR_ipv4_bgp_oper \
    as xr_ipv4_bgp_oper
from ydk.models.cisco_ios_xr import Cisco_IOS_XR_ipv4_bgp_datatypes \
    as xr_ipv4_bgp_datatypes
from ydk.types import Empty, YList, YLeafList, DELETE, Decimal64, FixedBitsDict, READ
import logging

#get operational data for BGP -option 1
bgp1 = xr_ipv4_bgp_oper.Bgp()

instance = bgp1.instances.Instance()
instance.instance_name = "default"
default_vrf = instance.instance_active.default_vrf
af = default_vrf.afs.Af()
af.af_name = xr_ipv4_bgp_datatypes.BgpAddressFamilyEnum.ipv4_unicast
network1 = af.networks.Network()
#network1.network = "192.168.0.100/32"
af.networks.network.append(network1)
default_vrf.afs.af.append(af)
bgp1.instances.instance.append(instance)
# create NETCONF provider
provider = NetconfServiceProvider(address="172.16.1.1",
                                  port="830",
                                  username="cisco",
                                  password="cisco",
                                  protocol="ssh")
# create codec provider
codec_provider = CodecServiceProvider(type="xml")

#creating crud & codec service
crud = CRUDService()
codec = CodecService()
#read operational data
networks = crud.read(provider,network1)
print codec.encode(codec_provider,networks)
#close session
provider.close()
codec_provider.close()

from ydk.models.cisco_ios_xr import Cisco_IOS_XR_ipv4_bgp_oper as xr_ipv4_bgp_oper 
from ydk.models.cisco_ios_xr import Cisco_IOS_XR_ipv4_bgp_datatypes as xr_ipv4_bgp_datatypes 

bgp = xr_ipv4_bgp_oper.Bgp()

i = xr_ipv4_bgp_oper.Bgp.Instances.Instance()
i.instance_name='default'

af = xr_ipv4_bgp_oper.Bgp.Instances.Instance.InstanceActive.DefaultVrf.Afs.Af()
af.af_name = xr_ipv4_bgp_datatypes.BgpAddressFamilyEnum.ipv4_unicast

n = xr_ipv4_bgp_oper.Bgp.Instances.Instance.InstanceActive.DefaultVrf.Afs.Af.Networks.Network()

af.networks.network.append(n)
i.instance_active.default_vrf.afs.af.append(af)
bgp.instances.instance.append(i)

result=crud.read(provider,n)

 Results in below RPC: 

2017-07-25 15:11:02,575 - ydk.services.crud_service - INFO - READ operation initiated
2017-07-25 15:11:02,576 - ydk.providers._provider_plugin - DEBUG - 
<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="urn:uuid:b177072e-68d9-442a-a9c7-1fe478a762ba">
  <get>
    <filter type="subtree">
      <bgp xmlns="http://cisco.com/ns/yang/Cisco-IOS-XR-ipv4-bgp-oper">
        <instances>
          <instance>
            <instance-name>default</instance-name>
            <instance-active>
              <default-vrf>
                <afs>
                  <af>
                    <af-name>ipv4-unicast</af-name>
                    <networks>
                      <network/>
                    </networks>
                  </af>
                </afs>
              </default-vrf>
            </instance-active>
          </instance>
        </instances>
      </bgp>
    </filter>
  </get>
</rpc>