Ansible to connect to certain switchports on Cisco 2960

[Jason2 (Jason)]

I am working on a project that would require me to bump (shutdown and re-enable) switchports that are connected to an Access Point.

I have created a playbook to run a command “show cdp neighbours” on the switch, and that output would look like:

What I want to do, is to use ansible to only run a command (ansible play) on Gig 1/0/19 in this case. For other switches, it may be more switchports and maybe in different format (eg. Gi 2/0/35).

Is there a way to filter ansible output by looking for ‘AIR-AP280’ and then extract that corresponding Local Interface (switchport number)?

Or if there is another way to get done what I want, then great.

Any suggestions/recommendations?

It is over 50 switches, so it would be great if ansible can do what I want to do.

[Jason]

I would use the genie module and run the show cdp neighbor command. Then set fact and use that with the when command.

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[Jason2 (Jason)]

Thanks. If you don’t mind me asking because I am not familiar with this, can you give me an example of how to use the set fact and when statement for my case?

[Jason]

Something like that I suppose.

#Sets a varaiable for cdp neighbor detail

• name: Run show cdp neighbors command
  ios_command:
  commands:
• show cdp neighbors detail
  register: neighbors

Using the Genie Filter Plugin from the Genie Parse Role

Set pyats_neighbors as a dictionary

• name: Set fact with Genie Filter Plugin
  set_fact:
  pyats_neighbors: “{{ neighbors[‘stdout’][0] | clay584.genie.parse_genie(command=‘show cdp neighbors detail’, os=‘ios’) }}”

• name: Add interface desription
  ios_interfaces:
  config:

• name: “{{ item.value.local_interface }}”
  description: “{{ item.value.device_id }} - {{ item.value.port_id }}”
  state: merged
  loop: “{{ q(‘dict’, pyats_neighbors.index) }}”

when: item.value.port_id is “AIR-AP280”

[Jason2 (Jason)]

Thanks alot.

I have been getting this error for the past few days when trying to use genie:

fatal: [SW1]: FAILED! => {
“msg”: “template error while templating string: no filter named ‘clay584.genie.parse_genie’. String: {{ neighbors[‘stdout’][0] | clay584.genie.parse_genie(command=‘show cdp neighbors’, os=‘ios’) }}”
}

This is my playbook (what you sent but I needed to import the role first):

• hosts: uwioc-switches
  gather_facts: no
  tasks:

• name: Import role
  include_role:
  name: clay584.parse_genie

• name: Run show cdp neighbors
  ios_command:
  commands:

• show cdp neighbors
  register: neighbors

Using the Genie Filter Plugin from the Genie Parse Role

Set pyats_neighbors as a dictionary

• name: Set fact with Genie

• name: Import role
  include_role:
  name: clay584.parse_genie

• name: Run show cdp neighbors
  ios_command:
  commands:

• show cdp neighbors
  register: neighbors

Using the Genie Filter Plugin from the Genie Parse Role

Set pyats_neighbors as a dictionary

• name: Set fact with Genie Filter Plugin
  set_fact:
  pyats_neighbors: “{{ neighbors[‘stdout’][0] | clay584.genie.parse_genie(command=‘show cdp neighbors’, os=‘ios’) }}”

• name: Add interface description
  ios_interfaces:
  config:

• name: “{{ item.value.local_interface }}”
  description: “{{ item.value.device_id }} - {{ item.value.port_id }}”
  state: merged
  loop: “{{ q(‘dict’, pyats_neighbors.index) }}”
  when: item.value.port_id is “AIR-AP280”

My python version is 3.6.8 and Ansible is 2.9.9

I followed this guide to install the necessary libraries:
https://developer.cisco.com/codeexchange/github/repo/clay584/parse_genie/

The error still persists. Also posted the issue on GitHub. Not sure if it is bug in the parsing library.

Any assistance would greatly be appreciated.

Thanks.

[Jason]

I am using the collection not the role. So it looks like this at the top. Had to add the interpreter variable because Ansible kept using Python 2

[Jason2 (Jason)]

This error shows:

fatal: [SW1]: FAILED! => {“msg”: “template error while templating string: no filter named ‘clay584.genie.parse_genie’. String: {{ neighbors[‘stdout’][0] | clay584.genie.parse_genie(command=‘show cdp neighbors’, os=‘ios’) }}”}

This is the full playbook I am using:

[Jason]

Not sure it seems like it is looking for the filter. Have you used a collection before? Is the collections_path defined in the ansible.cfg?

[Jason2 (Jason)]

No I have never used a collection before. So my ansible.cfg is currently to the default

[Jason]

You need to add a new line under [defaults]

collections_paths = /path/to/collections

[Jason2 (Jason)]

I added it. Now this shows:

fatal: [SW1]: FAILED! => {
“msg”: “parse_genie: Genie package is not installed. To install, run ‘pip install genie’.”
}

When I do pip or pip3 install genie, it says requirements already satisfied (as I already installed it).

Just to show you what my directories look like:

And under [defaults] in my ansible.cfg:

collections_paths = /etc/ansible/collections/ansible_collections/

Tried putting a less specific and then a more specifc path to the collections folder also. (= /etc/ansible/collections, = /etc/ansible/collections/ansible_collections/clay584/genie)

Prior to this, I did a ansible-galaxy collection install clay584.genie to install the collection and it said this:
Installing ‘clay584.genie:0.1.11’ to ‘/root/.ansible/collections/ansible_collections/clay584/genie’

Did I do anything wrong?

[Jason]

Well at this point I would probably remove genie. Then create a virtual python environment. Run the pip install commands and see if that works for you. If you are still running into issues I would reach out to the guys who made genie - I think Clay is in the group there too.

https://eurl.io/#r18UzrQVr

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