I know, even Cisco NX-OS has a REST-API and Streaming Telemetry these days. But you, or established processes in your organisation, might find it helpful to handle all switch ‘Telemetry’ in the same way using good old per device SNMP polling. A quick poll* on the Twitters seems to validate that ~80% of production network metrics are still SNMP anyway.
Modern controller based networks are quite different from a monitoring perspective, all the fancy network abstraction information is hiding behind this thing called API. SNMP might still be there, but is missing most of the interesting bits like health scores, faults and Tenant/App/Policy based metrics. And sometimes your legacy ehm, established NMS has no clue how to query or interpret those programmable interfaces…
Managing hundreds of devices with your monitoring system might be a tedious task, especially when using GUI based device onboarding. But why not let your config management tool of choice take care of it? This blog post is about a declarative Ansible playbook to generate Telegraf configuration files leveraging the inputs.ping plugin and populate a Grafana World Map.
So you are using the TIG-Stack to visualize device metrics like interface counters, CPU and memory already? Great, I think Grafana really excels in the dashboarding domain. But did you ever wonder, how to leverage the same solution to store and display syslog messages? Well, then this post is for you.