Guys, The ietf-interfaces model is downloadable from XR only because it is a dependency of the openconfig-interfaces model. You will see that ietf-interfaces is NOT advertised as a capability (or if it is, it will be accompanied by a deviation file deviating all its data nodes to be "not-supported"), and XR doesn't support any of its data nodes. Cheers, Einar ... View more

Simon, Apologies for taking so long to get back to you. I've got a working sample for you to use as a template. The code below will delete the primary and secondary addresses off of an interface, and you should be able to adapt it to other scenarios fairly easily: #! /usr/bin/env python3 __author__ = 'einarnn' ''' Working with YDK 0.6.1, XE models against IOS-XE ''' from ydk.services import CRUDService from ydk.providers import NetconfServiceProvider from ydk.filters import YFilter from ydk.models.cisco_ios_xe import Cisco_IOS_XE_native as xe import logging if __name__=='__main__':     logger = logging.getLogger("ydk")     logger.setLevel(logging.INFO)     handler = logging.StreamHandler()     formatter = logging.Formatter(("%(asctime)s - %(name)s - "                                   "%(levelname)s - %(message)s"))     handler.setFormatter(formatter)     logger.addHandler(handler)        crud = CRUDService()     # set up the thing we want to delete     del_native = xe.Native()     del_intf = xe.Native.Interface.GigabitEthernet()     del_intf.name = "4"     del_intf.ip.address.primary.yfilter = YFilter.remove     del_native.interface.gigabitethernet.append(del_intf)        # connect to the device     provider = NetconfServiceProvider(address='172.16.20.1',                                       port=2223,                                       username='vagrant',                                       password='vagrant',                                       protocol='ssh')        crud.update(provider, del_native) And here's a sample log from running the test now: $ python basic.py 2017-10-09 22:17:11,752 - ydk - INFO - Path where models are to be downloaded: /home/cisco/.ydk/172.16.20.1:2223 2017-10-09 22:17:11,758 - ydk - INFO - Connected to 172.16.20.1 on port 2223 using ssh with timeout of -1 2017-10-09 22:17:11,758 - ydk - INFO - Connected to 172.16.20.1 on port 2223 using ssh with timeout of -1 2017-10-09 22:17:11,758 - ydk - INFO - Executing CRUD update operation 2017-10-09 22:17:11,868 - ydk - ERROR - Libyang ERROR: Schema node not found. Path: 'address' 2017-10-09 22:17:11,869 - ydk - ERROR - Libyang ERROR: Schema node not found. Path: 'primary' 2017-10-09 22:17:11,905 - ydk - INFO - =============Generating payload to send to device============= 2017-10-09 22:17:11,906 - ydk - INFO - <rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"><edit-config xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">   <target>     <running/>   </target>   <error-option>rollback-on-error</error-option>   <config><native xmlns=" http://cisco.com/ns/yang/Cisco-IOS-XE-native " xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0" nc:operation="merge">   <interface>     <GigabitEthernet>       <name>4</name>       <ip>         <address>           <primary nc:operation="remove"/>         </address>       </ip>     </GigabitEthernet>   </interface> </native> </config> </edit-config> </rpc> 2017-10-09 22:17:11,906 - ydk - INFO - 2017-10-09 22:17:11,914 - ydk - INFO - =============Reply payload received from device============= 2017-10-09 22:17:11,915 - ydk - INFO - <?xml version="1.0" encoding="UTF-8"?> <rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="1">   <ok/> </rpc-reply> 2017-10-09 22:17:11,915 - ydk - INFO - 2017-10-09 22:17:11,915 - ydk - INFO - Operation succeeded 2017-10-09 22:17:11,915 - ydk - INFO - Disconnected from device 2017-10-09 22:17:11,915 - ydk - INFO - Disconnected from device Hope this helps!! Cheers, Einar ... View more

Here are some pointers. show interfaces [ interface_name ] show interfaces [ interface_name ] detail Look in the module Cisco-IOS-XR-pfi-im-cmd-oper. show controlllers SONET [ interface_name ] show controlllers [ interface_name ] phy Look in the module Cisco-IOS-XR-pmengine-oper. clear counters SONET [ interface_name ] clear counters POS [ interface_name ] clear counters [ interface_name ] As of IOS-XR 6.3.1, we do not have clear RPCs for these counters. Cheers, Einar ... View more