How to find bottlenecks in the network without admin access to ASO?

Question

Computer networks

It just so happened that not the most pleasant specialists work as networkers in our large company. Packets are lost, ARP tables crash, routes are built according to some inadequate algorithms, access lists live their own lives, etc. And to show them, except for empirical data, there is nothing special.
Are there any tools for collecting information about the life of the network without, in fact, admin access to network equipment? There are all other rights in the domain: you can deploy a VM in any VLAN, plug a piece of hardware wherever you want, and so on.

Answer 1

Get out of those. dira/head of the IT department audit access: if the hardware can in Netflow, then get ntop-ng and let it go, if not, read-only access to SNMP, data from which can be processed by the Telegraf/InfluxDB/Grafana stack , for example.

Answer 2

Is the security policy in your large company documented? Of course, it’s unlikely that there will be anything for collecting information, and even received with your usual access, but an attempt to use the discovered holes can lead to not too pleasant consequences