Parse, Audit, Query, Build, and Modify Cisco IOS-style configurations
Table of Contents
Nety is a Python library, which parses through Cisco IOS-style (and other vendor) configurations. It can:
Audit existing router / switch / firewall / wlc configurations
Retrieve portions of the configuration
Modify existing configurations
Build new configurations
The library examines an IOS-style config and breaks it into a set of linked parent / child relationships. You can perform complex queries about these relationships.
Don’t let that stop you.
Juniper Networks Junos, and Screenos
F5 Networks configurations
Nety also handles anything that has a Cisco IOS style of configuration, which includes:
Cisco IOS, Cisco Nexus, Cisco IOS-XR, Cisco IOS-XE, Aironet OS, Cisco ASA, Cisco CatOS
Force 10 Switches
Dell PowerConnect Switches
# Substitute whatever Nety version you like... easy_install -U nety==1.3.0
Alternatively you can install into Python2.x with pip:
pip install --upgrade Nety
Use pip3 for Python3.x…
pip3 install --upgrade Nety
Otherwise download it from PyPi, extract it and run the setup.py script:
python setup.py install
If you’re interested in the source, you can always pull from the github repo:
git clone https://github.com/YtenSoftware/Nety.git
QUESTION: I want to use Nety with Python3; is that safe? ANSWER: As long as you’re using Python 3.3 or higher, it’s safe. I test every release against Python 3.2+; however, Python 3.2 is currently exposed to a small bug for some configurations (see Github Issue #14).
QUESTION: Some of the code in the documentation looks different than what I’m used to seeing. Did you change something? ANSWER: Yes, starting around Nety v0.9.10 I introducted more methods directly on IOSConfigLine() objects; going forward, these methods are the preferred way to use Nety. Please start using the new methods shown in the example, since they’re faster, and you type much less code this way.
QUESTION: Nety saved me a lot of time, I want to give money. Do you have a donation link? ANSWER: I love getting emails like this; helping people get their jobs done is why I wrote the module. However, I’m not accepting donations.
QUESTION: Is there a way to use this module with perl? ANSWER: Yes, I do this myself. Install the python package as you normally would and import it into perl with Inline.pm and Inline::Python from CPAN.
QUESTION: When I use find_children("interface GigabitEthernet3/2"), I’m getting all interfaces beginning with 3/2, including 3/21, 3/22, 3/23 and 3/24. How can I limit my results? ANSWER: There are two ways… the simplest is to use the ‘exactmatch’ option… find_children("interface GigabitEthernet3/2", exactmatch=True). Another way is to utilize regex expansion that is native to many methods… find_children("interface GigabitEthernet3/2$")
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