I am ecstatic that unicast prefix is graphed on Observium.

Is there a way to alert on a change in the number of routes being advertised?

For example, say I am receiving 500 routes from a peer, and that drops to 430, is that an alert-able event?

(Sorry if this is a repeated question, I am having difficulty finding detailed information on alerts outside of the wiki that just has general alerts documented.)

Cheers,

Michael Vieth