Template Editor - jinja2 ipaddr filter

Doug Byrd — Thu, 26 May 2022 18:09:08 GMT

I'm working with some Jinja2 templates and have a need to use Jinja2's 'ipaddr' filter. Since this isn't well documented from a DNAC perspective, I've been trying to use some of the attributes/schema that are present in the Ansible version of ipaddr. I've got the basics working, but I seem to be getting stuck on the syntax for choosing an index/ipaddress in a network.

I have this working properly:

{% set network = '192.168.2.5/22' %}

Input: {{ network }}
Network Address: {{ network | ipaddr('network') }}
Address: {{ network | ipaddr('address') }}
Netmask: {{ network | ipaddr('netmask') }}
Prefix: {{ network | ipaddr('prefix') }}
Broadcast: {{ network | ipaddr('broadcast') }}

Input: 192.168.2.5/22
Network Address: 192.168.0.0
Address: 192.168.2.5
Netmask: 255.255.252.0
Prefix: 22
Broadcast: 192.168.3.255

What I want to be able to do is address an IP address by it's index. For example, in Ansible I can programmatically choose the gateway to be the first usable ip address in a network by using something like:

{% set network = "192.168.1.0/24" %}
HSRP IP: {{ network | ipaddr(1) | ipaddr('address') }}
Router 1: {{ network | ipaddr(2) | ipaddr('address') }}
Router 2: {{ network | ipaddr(3) | ipaddr('address') }}
LB VIP: {{ network | ipaddr(-2) | ipaddr('address') }}
LB1: {{ network | ipaddr(-3) | ipaddr('address') }}
LB2: {{ network | ipaddr(-4) | ipaddr('address') }}

HSRP IP: 192.168.1.1
Router 1: 192.168.1.2
Router 3: 192.168.1.3
LB VIP: 192.168.1.254
LB1: 192.168.1.253
LB2: 192.168.1.252

Am I just missing the proper syntax, or is this functionality even available?

Thanks!

Re: Template Editor - jinja2 ipaddr filter

Preston Chilcote — Fri, 27 May 2022 19:42:20 GMT

In principle, the Cisco DNA jinja editor should allow copy/paste from your Ansible jinja templates. Please submit a Make a Wish via the GUI's help menu to let the development team know of this missing feature.

Re: Template Editor - jinja2 ipaddr filter

Doug Byrd — Tue, 31 May 2022 13:23:30 GMT

Thanks @Preston Chilcote I have submitted a Make a Wish from both our Lab and our Production instance 🙂 No one has yet to reach out, so I posted here to see if anyone had worked through it already.

Looking forward to future updates for this product.

Re: Template Editor - jinja2 ipaddr filter

minkij — Tue, 23 Dec 2025 14:07:13 GMT

Did Cisco every grant your wish?

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Template Editor - jinja2 ipaddr filter

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Re: Template Editor - jinja2 ipaddr filter