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Port Spanning 3550

I have 10 3550s around my building and I am wanting to use port spanning to gather all packets on a single port for all switches. They are all interconnected using 802.1Q trunking. Surely I should not have to put port spanning on each switch and install a PC to monitor each switch. Any suggestiions?

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Cisco Employee

Re: Port Spanning 3550

Have a look at this link, it has some good info on both SPAN and RSPAN and the 3550s. This gives a good overview of how to capture the data as well as configurations:

http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12119ea1/3550scg/swspan.htm

Silver

Re: Port Spanning 3550

If you have the bandwith between the switches then you can have one sniffer box on the central switch and SPAN somewhere in the network.

Here is how you do it.

http://www.cisco.com/en/US/partner/products/hw/switches/ps646/products_configuration_guide_chapter09186a00801ce0bc.html

Keep in mind that it requires to know the switch topolgy very well and injecting the sniffed traffic elsewhere in the network is a great way to shoot you in the foot.

Cheers,

Michel

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