Unable to get show bgp summary output using YDK

jayachandran.subramanian1 · ‎04-17-2017

Hi ,

Manually we able to get show bgp summary output using CLI .

Unable to get the same show bgp summary output using YDK

script details:

from ydk.services import CRUDService,CodecService

from ydk.providers import NetconfServiceProvider,CodecServiceProvider

from ydk.models.cisco_ios_xr import Cisco_IOS_XR_shellutil_oper \

as xr_shellutil_oper

from ydk.models.cisco_ios_xr import Cisco_IOS_XR_ipv4_bgp_oper

from ydk.models.cisco_ios_xr import Cisco_IOS_XR_ipv4_bgp_datatypes

from datetime import timedelta

provider = NetconfServiceProvider(address="192.168.10.10",

username="username1",

password="password1",

protocol="ssh")

crud = CRUDService()

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'

neighbor =Cisco_IOS_XR_ipv4_bgp_oper.Bgp.Instances.Instance.InstanceStandby.Vrfs.Vrf.Neighbors.Neighbor()

vrf.neighbors.neighbor.append(neighbor)

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

bgp.instances.instance.append(instance)

bgp_networks = crud.read(provider, neighbor,only_config=False)

print dir(bgp_networks)

print int(bgp_networks.neighbor_address)

print str(bgp_networks.connection_established_time)

print int(bgp_networks.connection_established_time)

provider.close()

Error output

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

fabric@FabricAutomation:~/jay$ python bgp_neighbor1.py

['__class__', '__delattr__', '__doc__', '__format__', '__getattribute__', '__hash__', '__init__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__']

Traceback (most recent call last):

File "bgp_neighbor1.py", line 42, in <module>

print int(bgp_networks.neighbor_address)

AttributeError: 'NoneType' object has no attribute 'neighbor_address'

fabric@FabricAutomation:~/jay$

kindly let us know solution to findout the output for show bgp summary using YDK.

Thanks

Jay

einarnn · ‎04-18-2017

Jay,

Remember that the XR Oper data model for BGP and VRF content model the default VRF in a separate subtree. Here is a simple example that:

Queries for the default BGP instance

Iterates over the result:

For each instance (just the one called ‘default’):

Get a reference to the default VRF

Iterate over all neighbors, and for each neighbor:

Print the neighbor address

Print the remote AS

In my config, all I have is:

RP/0/RP0/CPU0:ios#show run router bgp

Tue Apr 18 07:31:26.138 UTC

router bgp 666

address-family ipv4 unicast

network 192.168.0.0/16

!

neighbor 192.168.1.1

remote-as 1

!

Hopefully the code below will be enough to get you started:

from ydk.services import CRUDService,CodecService

from ydk.providers import NetconfServiceProvider,CodecServiceProvider

from ydk.models.cisco_ios_xr import Cisco_IOS_XR_shellutil_oper as xr_shellutil_oper

from ydk.models.cisco_ios_xr import Cisco_IOS_XR_ipv4_bgp_oper

from ydk.models.cisco_ios_xr import Cisco_IOS_XR_ipv4_bgp_datatypes

from datetime import timedelta

from ydk.types import READ

provider = NetconfServiceProvider(address="127.0.0.1",

port=8300,

username="cisco",

password="cisco",

protocol="ssh")

crud = CRUDService()

q_instance = Cisco_IOS_XR_ipv4_bgp_oper.Bgp.Instances.Instance()

q_instance.instance_name = 'default'

q_instances = Cisco_IOS_XR_ipv4_bgp_oper.Bgp.Instances()

q_instances.instance.append(q_instance)

instances = crud.read(provider, q_instances)

for inst in instances.instance:

print('Instance: %s' % inst.instance_name)

default_vrf = inst.instance_active.default_vrf

for n in default_vrf.neighbors.neighbor:

print(' neighbor %s' % n.neighbor_address)

print(' remote-as: %s' % n.remote_as)

provider.close()

Cheers,

Einar

jayachandran.subramanian1 · ‎04-18-2017

HI ,

I copied your script and executed in my setup .

got the below output :

fabric@FabricAutomation:~/jay$ sudo python bgp_neigh.py

Instance: default

[]

fabric@FabricAutomation:~/jay$

Getting empty list

However we got output using nccclient .

<data>

<instance-name>default</instance-name>

<instance-active>

<default-vrf>

<neighbor-address>10.10.10.1</neighbor-address>

</neighbor>

<neighbor-address>10.10.10.2</neighbor-address>

</neighbor>

</neighbors>

</default-vrf>

</instance-active>

</instance>

</instances>

</bgp>

</data>

</rpc-reply>

kindly do the needful for resolution

einarnn · ‎04-18-2017

Jay,

I'm sorry, but there is not much more I can suggest at this point. The code as I suggested above works find on my test instance of xrv9k. You can try enabling debugs. For example:

import logging

LOGGING_TO_ENABLE = [

    'ncclient.transport.session',

    'ncclient.operations.rpc',

    'ydk.providers',

]

handler = logging.StreamHandler()

for l in LOGGING_TO_ENABLE:

    logger = logging.getLogger(l)

    logger.addHandler(handler)

    logger.setLevel(logging.DEBUG)

This will enable ncclient debugs and some YDK debug and may let you see what problems there may be.

Cheers,

Einar

saalvare · ‎04-18-2017

Here's a streamlined version assuming that you only care about default instance and global routing space. Script output:

$ ./nc-read-xr-ipv4-bgp-oper-99-ydk.py ssh://xx:xx@host

Neighbor: 172.16.255.2

Established time: 224

$

Script:

#!/usr/bin/env python2
#
# Copyright 2016 Cisco Systems, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#


"""
Read default VRF for model Cisco-IOS-XR-ipv4-bgp-oper.


usage: nc-read-xr-ipv4-bgp-oper-99-ydk.py [-h] [-v] device


positional arguments:
  device         NETCONF device (ssh://user:password@host:port)


optional arguments:
  -h, --help     show this help message and exit
  -v, --verbose  print debugging messages
"""


from argparse import ArgumentParser
from urlparse import urlparse


from ydk.services import CRUDService
from ydk.providers import NetconfServiceProvider
from ydk.models.cisco_ios_xr import Cisco_IOS_XR_ipv4_bgp_oper
import logging




if __name__ == "__main__":
    """Execute main program."""
    parser = ArgumentParser()
    parser.add_argument("-v", "--verbose", help="print debugging messages",
                        action="store_true")
    parser.add_argument("device",
                        help="NETCONF device (ssh://user:password@host:port)")
    args = parser.parse_args()
    device = urlparse(args.device)


    # log debug messages if verbose argument specified
    if args.verbose:
        logger = logging.getLogger("ydk")
        logger.setLevel(logging.DEBUG)
        handler = logging.StreamHandler()
        formatter = logging.Formatter(("%(asctime)s - %(name)s - "
                                      "%(levelname)s - %(message)s"))
        handler.setFormatter(formatter)
        logger.addHandler(handler)


    # create NETCONF provider
    provider = NetconfServiceProvider(address=device.hostname,
                                      port=device.port,
                                      username=device.username,
                                      password=device.password,
                                      protocol=device.scheme)
    # create CRUD service
    crud = CRUDService()


    instance = Cisco_IOS_XR_ipv4_bgp_oper.Bgp.Instances.Instance()  # create object
    instance.instance_name = 'default'

    default_vrf = crud.read(provider, instance.instance_active.default_vrf)


    for neighbor in default_vrf.neighbors.neighbor:
      print "Neighbor: {}".format(neighbor.neighbor_address)
      print "Established time: {}".format(neighbor.connection_established_time)


    provider.close()
    exit()
# End of script