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I would like to correct, after reading up a little more the 3750's do not support NAT, but they do support interVLAN routing, so you could just connect all three subnets to VLAN's in city hall and route between them.<br />
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sorry...
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I would like to correct, after reading up a little more the 3750's do not support NAT, but they do support interVLAN routing, so you could just connect all three subnets to VLAN's in city hall and route between them.

sorry...

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Hello Experts<br />
I have 4 cisco Catalyst 3750 switches with IOS ™ C3750 Software (C3750-I9-M), Version 12.1(19)EA1d RELEASE SOFTWARE (fc1)<br />
we need to connect our police and fire departments to cityhall with fiber. the 3 locations are on 3 different class b subnets.<br />
My question is can I plug the fiber directly into a fiber GBIC on the 3750's and create VLANs and Route between them internally with the 3750. And if so how is this done. I have very little knowlege in working with cisco switches. I've done some internet searches but everything is so cryptic its hard to tell if what I'm reading is what I need to do.<br />

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Hello Experts
I have 4 cisco Catalyst 3750 switches with IOS ™ C3750 Software (C3750-I9-M), Version 12.1(19)EA1d RELEASE SOFTWARE (fc1)
we need to connect our police and fire departments to cityhall with fiber. the 3 locations are on 3 different class b subnets.
My question is can I plug the fiber directly into a fiber GBIC on the 3750's and create VLANs and Route between them internally with the 3750. And if so how is this done. I have very little knowlege in working with cisco switches. I've done some internet searches but everything is so cryptic its hard to tell if what I'm reading is what I need to do.


How can I use the cisco catalyst 3750 as a router for our police and fire departments

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.