promiscuous port on a switch?

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Feb 24th, 2004
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Hello, I want to install an IDS solution that needs to have access to all traffic on the LAN. All of my machines plug directly into a 3550 catalyst switch running IOS Version 12.1(13)EA1a.


Is there any way to have a copy of all data sent to a spicific port on the switch (almost like a mirror port). Sorry I am not sure what the appropriate terminology is.



Thanks a lot



Jeff

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grunky Wed, 02/25/2004 - 09:59
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The thing to remember is that once a switchport is in destination span mode it won't forward normal traffic. ie you'll need two physical nics plugged into different switchports for a IDS box. Either that or just access the IDS box via console only.


More secure but a pain.

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