C3KX-NM-10G Network Modules Catalyst 3560-X, 3750-X Series Catalyst 3K-X 10G Network Module option PID The Cisco Catalyst 3750-X Series and 3560-X Series Switches support an optional network module for uplink ports. The default switch configuration doesn't include the uplink module; the customer has the flexibility to choose from four GbE port (3KX-NM-1G) or two 10GbE port (3KX-NM-10G) network module at the time of switch purchase. The 10GbE uplink module features four physical ports with two SFP+ and two regular SFP ports. The SFP+ interface supports both 10GbE and GbE port, allowing customer to use their investment in GbE SFP and upgrade to 10GbE when business demands change, without having to do a comprehensive upgrade of the access switch. The uplink module is hot swappable. The 10GbE network module can be used in any of the combinations
The module has four slots. Two slots support only 1-Gigabit SFP modules. Two slots support either 1-Gigabit SFP or 10-Gigabit SFP+ modules.
Note: The GLC-T SFP is not supported on the SFP+ slots of C3KX-NM-10G.
The four slots are grouped as two pairs, with each pair consisting of one SFP slot and one SFP+ slot. Each pair supports either two 1-Gigabit SFP modules or one 10-Gigabit SFP+ module. A 10-Gigabit SFP+ module cannot operate at the same time as the corresponding 1-Gigabit SFP module in the pair.
Supported combinations of SFP and SFP+ modules:
- Slots 1, 2, 3, and 4 with 1-Gigabit SFP modules
- Slots 1 and 2 with 1-Gigabit SFP modules and Slot 4 with one 10-Gigabit SFP+ module
- Slot 2 with one 10-Gigabit SFP+ module and Slots 3 and 4 with 1-Gigabit SFP modules
- Slot 2 and Slot 4 each with 10-Gigabit SFP+ modules
A 10-Gigabit SFP+ module takes precedence over a 1-Gigabit SFP module except when an SFP module is first inserted in Slot 1 and has link. When you insert an SFP+ module in Slot 2, the SFP in Slot 1 retains link. The SFP+ module in Slot 2 does not operate.
When the SFP module in Slot 1 is shutdown, loses link, or is removed, the SFP+ module in Slot 2 turns on. The SFP module in Slot 1 does not work as long as an SFP+ module is in Slot 2, whether it has link up or not.
The same precedence applies to Slots 3 and 4.
