Port Mirroring for traffic monitoring

Right now I’m using a switch with port mirroring enabled to monitor all of the traffic that goes in and out of my network. I have NTOP setup on a box connected to the ‘monitoring’ switch and it works great. Here’s how I currently have it setup:

ISP-CPE
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|
Switch----->NTOP
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|
MT Router
| |
| |
WLAN LAN

Soon I’m going to be adding another ISP so that complicates this setup. I don’t really want to add another switch just for the second ISP and I’m not sure if NTOP can even monitor two NIC’s at once. What I’m wondering is if there’s a way to turn a port on a MT router into a ‘monitoring port.’ Basically I’d like to combine all the traffic from ISP 1 port and ISP 2 port onto a third port to plug into my NTOP box. Is this possible with MT? Is there something in the CALEA package that might help?

Keefe

yes, calea might work - but doing it from the switch is still way better. Can you setup a vlan on your switch for each ISP and then port mirror those ? some nicer switches let you combine mirror ports as well.