I have WS-C3750 X-48T-L ( LAN base ) switch.
I plan to connect to 10gb device.
Based on config below, no need for me to purchase new module for 10gb port?
If i need to buy module, can i connect via RJ45.
Gi3/0/45 down down
Gi3/0/46 down down
Gi3/0/47 down down
Gi3/0/48 down down
Gi3/1/1 down down
Gi3/1/2 down down
Gi3/1/3 down down
Gi3/1/4 down down
Te3/1/1 down down <----------
Te3/1/2 down down <------------
Enter configuration commands, one per line. End with CNTL/Z.
We use the C3KX-NM-10G module in our 3750x access switches to uplink to our core at 2 x 10gbps (portchannel).
For us we use the Cisco 850nm MM optics and use LC fiber patch cables. Usually a server can be configured with a 10 gig nic that has SFP+ ports, so you can also get the same optics in a server, or if its within reach use the passive twinax cable.
Beware, while the C3KX-NM-10G module has 4 ports on it, only 2 ports can do 10 gig and if they are both used, the other two ports are blocked. So its either 4 ports of 1 gig, 2 ports of 1 gig and 1 port of 10 gig, or two ports of 10 gig. Engineering oversight, or just not enough bandwidth / cpu on that module connector and the 3750 platform? You decide.
I have never seen an RJ-45 10 gig SFP+ port. I don't think there is enough power in the SFP+ specification for it. Therefore all I've seen are various optics and twinax cables.
If I remember correctly, the 3750X will show "ghost" ports, i.e. placeholders for when the module is installed. I.e. "seeing"ports in the device config doesn't always mean they are actually there.
Two 10G ethernet link is available for uplink. you are good to go. . .