Segfault during creation GRE tunnel on IOS XE

[ghost]

From community

Expected Behavior

I trying to create tunnel on IOS XE, but if I try set tunnel source or destination - script interrupted with segmentation fault.

Your Script

crud = CRUDService()
 
 
native = xe_native.Native()
interface = native.Interface()
tunnel = interface.Tunnel()
tunnel.name = 521
tunnel.description = "test tunnel"
tunnel.vrf.forwarding="PostNscrub"
#tunnel.ip.address.primary.address= "192.168.201.202"
#tunnel.ip.address.primary.mask="255.255.255.254"
tunnel.ip.tcp.adjust_mss=1436
tunnel.tunnel.source="Lo103"
#tunnel.tunnel.destination="8.8.8.8"
interface.tunnel.append(tunnel)
crud.create(provider, interface)

Logs

Enable logging and post the logs below

2017-11-15 21:34:14,971 - ydk - DEBUG - Path found with rev: true. Path without rev: false
2017-11-15 21:34:14,972 - ydk - DEBUG - Debug: Module "Cisco-IOS-XE-features" already in context.
2017-11-15 21:34:14,973 - ydk - DEBUG - Debug: Module "Cisco-IOS-XE-features" successfully parsed.
2017-11-15 21:34:14,979 - ydk - DEBUG - Debug: Module "Cisco-IOS-XE-tunnel" successfully parsed.
2017-11-15 21:34:14,979 - ydk - DEBUG - Added new libyang module 'Cisco-IOS-XE-tunnel'
2017-11-15 21:34:14,979 - ydk - DEBUG - Populating new module schema 'Cisco-IOS-XE-tunnel'
2017-11-15 21:34:14,979 - ydk - DEBUG - Populating augmented schema node 'config-interface-tunnel-grouping'
2017-11-15 21:34:14,980 - ydk - DEBUG - Populating new schema node 'nhrp'
2017-11-15 21:34:14,980 - ydk - DEBUG - Populating augmented schema node 'config-interface-tunnel-grouping'
2017-11-15 21:34:14,981 - ydk - DEBUG - Populating new schema node 'nhrp'
2017-11-15 21:34:14,981 - ydk - DEBUG - Current path: /Cisco-IOS-XE-native:native/config-interface-grouping/interface/Tunnel
2017-11-15 21:34:14,982 - ydk - DEBUG - Top container path: Cisco-IOS-XE-native:native
2017-11-15 21:34:14,982 - ydk - DEBUG - Module 'Cisco-IOS-XE-tunnel' Revision ''
2017-11-15 21:34:14,982 - ydk - DEBUG - Cache hit Module 'Cisco-IOS-XE-tunnel' Revision ''
2017-11-15 21:34:14,982 - ydk - DEBUG - Getting child schema with path 'Cisco-IOS-XE-tunnel:tunnel' in Tunnel
2017-11-15 21:34:14,983 - ydk - DEBUG - Getting data nodes with path 'Cisco-IOS-XE-tunnel:tunnel'
2017-11-15 21:34:14,983 - ydk - DEBUG - Creating new data path 'Cisco-IOS-XE-tunnel:tunnel' with value '' in 'Tunnel'
2017-11-15 21:34:14,983 - ydk - DEBUG - Leaf count: 1
2017-11-15 21:34:14,984 - ydk - DEBUG - Creating child source of /Cisco-IOS-XE-native:native/interface/Tunnel[name='521']/Cisco-IOS-XE-tunnel:tunnel with value: 'Lo103', is_set: true

System Information

ydk 062

[psykokwak4]

The 'config-interface-tunnel-grouping' looks wired

[ghost]

Segfault does not occur anymore, but still seeing below exception

2018-01-03 10:33:01,422 - ydk - ERROR - Couldn't fetch schema node source!
ERROR:ydk:Couldn't fetch schema node source!
---------------------------------------------------------------------------
YPYCoreError                              Traceback (most recent call last)
<ipython-input-6-21983dd16dd9> in <module>()
----> 1 crud.create(ncc,native)

~/p/lib/python3.6/site-packages/ydk/errors/error_handler.py in helper(self, provider, entity, *args, **kwargs)
    110             err_msg = "'{0}' and '{1}' cannot be None".format(pname, ename)
    111             raise _YPYServiceError(error_msg=err_msg)
--> 112         return func(self, provider, entity, *args, **kwargs)
    113     return helper

~/p/lib/python3.6/site-packages/ydk/services/crud_service.py in create(self, provider, entity)
     28     def create(self, provider, entity):
     29         with _handle_error():
---> 30             return self._crud.create(provider, entity)
     31 
     32     @_check_argument

/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/contextlib.py in __exit__(self, type, value, traceback)
     97                 value = type()
     98             try:
---> 99                 self.gen.throw(type, value, traceback)
    100             except StopIteration as exc:
    101                 # Suppress StopIteration *unless* it's the same exception that

~/p/lib/python3.6/site-packages/ydk/errors/error_handler.py in handle_runtime_error()
     80     finally:
     81         if _exc:
---> 82             _raise(_exc)
     83 
     84 

~/p/lib/python3.6/site-packages/ydk/errors/error_handler.py in _raise(exc)
     52     """
     53     if sys.version_info >= (3,3):
---> 54         exec("raise exc from None")
     55     else:
     56         raise exc

~/p/lib/python3.6/site-packages/ydk/errors/error_handler.py in <module>()

YPYCoreError:  Couldn't fetch schema node source

[ygorelik]

Getting different error with new libyang version:
test_632.zip

[ghost]

Unable to reproduce with the code from the ydk-gen master branch. The encode operation produces the xml as expected.

To install the latest code:

pip uninstall ydk -y
git clone https://github.com/ciscodevnet/ydk-gen.git
cd sdk/python/core
python setup.py sdist
pip install dist/ydk-*.tar.gz

This code will be part of next ydk release 0.7.1

[jeanoballe]

Hello. I'am trying to set tunnel source or destination like IBMeR but the issue persist. The Libyang error shows "Schema node not found.. Path: Cisco-IOS-XE-tunnel:tunnel". The remote device is a "cisco ASR1001-X" (Cisco IOS XE Software, Version 16.09.04). I think I have the same problem that @ygorelik mentioned before.

YDK version/OS
pip3 list | grep ydk
ydk 0.8.4
ydk-models-cisco-ios-xe 16.9.3.post1
ydk-models-cisco-ios-xr 6.6.3
ydk-models-ietf 0.1.5.post2

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.2 LTS
Release: 18.04
Codename: bionic

File Test and Logs:
tunnel_interface_test.zip.zip

[ygorelik]

First of all you need to fix your script due to incorrect use of API. Here are the changes in red you need to make: native = xe_native.Native()interface = native.interface    # instance of Native.Interface class has been instantiated in 'native'tunnel = interface.Tunnel()tunnel.name = 521tunnel.description = "test tunnel"tunnel.vrf.forwarding="PostNscrub"#tunnel.ip.address.primary.address= "192.168.201.202"#tunnel.ip.address.primary.mask="255.255.255.254"tunnel.ip.tcp.adjust_mss=1436tunnel.tunnel.source="Lo103"#tunnel.tunnel.destination="8.8.8.8"interface.tunnel.append(tunnel)crud.create(provider, interface) Second. Make sure your device software version corresponds to the cisco-ios-xe python package version. If not matching, you need to get right package from pypi.org or generate it yourself. Third. The error appeared while parsing module Cisco-IOS-XE-mpls.yang: 2020-05-25 11:40:18,087 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Unexpected XPath token [ ([lockdown]) = 1).2020-05-25 11:40:18,087 - ydk - ERROR - Data is invalid according to the yang model. Libyang error: Module "Cisco-IOS-XE-mpls" parsing failed. Therefore I suggest you to check file '/home/jean/.ydk/10.120.80.117/Cisco-IOS-XE-mpls.yang' and make sure the referenced XPath is correct or not. From what I see it does not look as correct. In comparison with xe/1693 the correct XPath looks like this:   grouping mpls-te-popt-lockdown-grouping {     leaf lockdown {       description         "Not a candidate for reoptimization";       type empty;     }     leaf sticky {       description         "Stay on the same path after change in required resources";       /*        * Validation: lockdown flag must be set first.        */       when "(count(..[lockdown]) = 1)";       type empty;     }   } If you find an error, you can edit/fix YANG file '/home/jean/.ydk/10.120.80.117/Cisco-IOS-XE-mpls.yang' in the temporary repository; the YDK will not overwrite it. Make sure to file a bug against erroneous YANG model. Please let me know if you have any question.  Regards,Yan GorelikYDK Solutions On Monday, May 25, 2020, 08:51:27 PM GMT+5:30, jeanoballe <notifications@github.com> wrote: Hello. I'am trying to set tunnel source or destination like IBMeR but the issue persist. The Libyang error shows "Schema node not found.. Path: Cisco-IOS-XE-tunnel:tunnel". The remote device is a "cisco ASR1001-X" (Cisco IOS XE Software, Version 16.09.04). I think I have the same problem that @ygorelik mentioned before. YDK version/OS pip3 list | grep ydk ydk 0.8.4 ydk-models-cisco-ios-xe 16.9.3.post1 ydk-models-cisco-ios-xr 6.6.3 ydk-models-ietf 0.1.5.post2 lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.2 LTS Release: 18.04 Codename: bionic File Test and Logs: tunnel_interface_test.zip.zip — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or unsubscribe.