How can I check what Application is consuming our bandwidth?

I have a little company that has 2Mb of bandwidth in an MPLS. Today, it is very slow for employees to work. There are several applications there but my suspect is the SAP Business One application that probably have persistent connection to the server, but how can I make sure it is that app the one that is consuming 99.9% of bandwidth?
José PerezAsked:
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Bryant SchaperCommented:
what router do you have?  You may have to wireshark the network or on a cisco router we could do top talkers and see which box.  But I suggest wireshark or netflow will provide the best insight some free products out there.
Neil PreeperCommented:
if you have a layer 2 switch then you can do port mirroring on your internet wan port. i use Languardian from to monitor applications and users from bandwith hoggers

download the iso and setup is pretty simple. 30 day trial is enough time to see who is hogging it all.
SolarWinds® Network Configuration Manager (NCM)

SolarWinds® Network Configuration Manager brings structure and peace of mind to configuration management. Bulk config deployment, automatic backups, change detection, vulnerability assessments, and config change templates reduce the time needed for repetitive tasks.

José PerezAuthor Commented:
#Bryant Schaper Any suggestion on what port/protocol to use in Wireshark? or, in a different way, how can I identify SAP Business One app in Wireshark?
Bryant SchaperCommented:
I would look for heavy traffic to and from the SAP servers, not sure of port.  You could google it.
Port 30000  30001 for SAP Server Tool and 1443 for SQL Server.

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