Trouble finding Management IP addresses

[padharkrunal]

Hi,

I am working on a project where I have to login to already established network and sniff out details about subnets being used. The problem I am facing right now is that I dont have a list of management IP addresses. I have tried using ARP in the management VRF and that gave me some success but it is not as satisfactory. 

I am looking for suggestions that I can try out.

Thank you

.

[balaji.bandi]

Honestly i still not able to figure it out, what exactly you looking can you elaborate more ?

how one can know your network and about your Management IP ?

[padharkrunal]

So there is already an established network With all the Edge Routers and LAN device after that. I have access to all those edge routers. These edge routers advertises routes in the bgp. Now I have to access those devices and verify that those subnets being advertised are actually in use or not.

This is kind of old network and was previously managed by various different companies. So we dont have a list of all the devices' management IP address. 

I tried using ARP. I was able to find some of the IP addresses. I was wondering if anyone has any other way to figure it out.

[balaji.bandi]

Ok the one you have already connected and have access you know the Manangement IP address for that device to have access.

other way is just ping sweep with ssh port open from your network,

I am sure you might have high level network topology, so do each network as suggested ping sweep.