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Chapter 1
Product Overview
Network Modules
The switch supports one hot-swappable network module that provides uplink ports to connect to other
devices. You must insert the network module during switch operation. Operating the switch without a
network module is not supported. A blank module is available.
The switch generates logs when you insert or remove a network module with SFP ports.
Table 1-3
Network Module
10-Gigabit Ethernet
C3KX-NM-10G
10-Gigabit Ethernet
C3KX-NM-10GT
10-Gigabit Ethernet
Service Module
C3KX-SM-10G
1-Gigabit Ethernet
C3KX-NM-1G
Blank
C3KX-NM_BLNK
1. All network modules are hot-swappable.
OL-19593-03
Network Modules
1
Description
This module has four slots. Two slots support only 1-Gigabit SFP modules, two
slots support either 1-Gigabit SFP or 10-Gigabit SFP+ modules.
The GLC-T SFP is not supported on the SFP+ slots of C3KX-NM-10G.
Note
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 populated with 1-Gigabit SFP modules.
•
Slots 1 and 2 populated with 1-Gigabit SFP modules and Slot 4 populated
•
with one 10-Gigabit SFP+ module.
Slot 2 populated with one 10-Gigabit SFP+ module and Slots 3 and 4
•
populated with 1-Gigabit SFP modules.
Slot 2 and Slot 4 each populated 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 becomes operational. At this point, the SFP module in Slot 1
will not become operational under any circumstance for as long as an SFP+
module remains in Slot 2 whether it is link up or not.
The same precedence applies to Slots 3 and 4.
This module has two autonegotiating 10-Gigabit Ethernet (copper) ports.
This module has two slots that support either 1-Gigabit SFP or 10-Gigabit SFP+
modules. The service module supports Net Flow and MACSec Uplink
Encryption (switch- to-switch encryption between uplinks).
This module has four 1-Gigabit SFP module slots. Any combination of standard
SFP modules are supported. SFP+ modules are not supported. If you insert an
SFP+ module in the 1-Gigabit network module, the SFP+ module does not
operate, and the switch logs an error message.
This module has no uplink ports.
Catalyst 3750-X and 3560-X Switch Hardware Installation Guide
Front Panel Description
1-7
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