I want to set up a port to monitor ALL the traffic on my network. My goal is to be able to sniff traffic between any two hosts, regardless of which switch they are connected to. I also need to sniff traffic between my hosts and internet hosts.
The network consists of 14 cisco 3550 switches and a handfull of unmanaged switches connected via crossover cables to various switches. These switches are interconnected in a variety of ways, fiber on Gi0/1-2, crossover cables, etc. Everything (as far as I know) is in VLAN1. I have configured my sniffer (Wireshark) port as follows:
! interface FastEthernet0/24 description monitor-port-vlan1 port monitor VLAN1 !
Will this do what I need it to do? Could it possibly be this easy?
TIA
JM