Catalyst 3850 Switch Hardware Installation Guide
Installing a Network Module
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Installing a Network Module

Installing a Network Module

Network Module Overview

Network Module1 Description

C3850-NM-4-1G

This module has four 1 G 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 G network module, the SFP+ module does not operate, and the switch logs an error message.

Note   

This is supported on the following switch models:

  • WS-C3850-24T/P/U

  • WS-C3850-48T/F/P/U

  • WS-C3850-12X48U

  • WS-C3850-12S

  • WS-C3850-24S

C3850-NM-2-10G

This module has four slots:

Two slots (left side) support only 1 G SFP modules and two slots (right side) support either 1 G SFP or 10 G SFP modules.

Note   

This is supported on the following switch models:

  • WS-C3850-24T/P/U

  • WS-C3850-48T/F/P/U

  • WS-C3850-12X48U

  • WS-C3850-12S

  • WS-C3850-24S

C3850-NM-4-10G

This module has four 10 G slots or four 1 G slots.

Note   

This is supported on the following switch models:

  • WS-C3850-48T/F/P/U

  • WS-C3850-12X48U

  • WS-C3850-12XS

  • WS-C3850-24XS

C3850-NM-8-10G

This module has eight 10 G slots with an SFP+ port in each slot. Each port supports a 1 G or 10 G connection

Note   

This is supported on the following switch models:

  • WS-C3850-12X48U

  • WS-C3850-24XS

C3850-NM-2-40G

This module has two 40 G slots with a QSFP+ connector in each slot.

Note   

This is supported on the following switch models:

  • WS-C3850-12X48U

  • WS-C3850-24XS

C3850-NM-BLANK

Insert this blank module when the switch has no uplink ports (this is required for sufficient air flow).

1 All network modules are hot-swappable.
Figure 1. C3850-NM-4-1G Network Module



1

Captive screws

3

LEDs

2

1 G Ethernet SFP slots

   
Figure 2. C3850-NM-2-10G Network Module



1

Captive screws

3

1 G Ethernet SFP slots

2

1 G or 10 G Ethernet SFP+ slots

4

LEDs

Figure 3. C3850-NM-4-10G Network Module



1

Captive screws

3

LEDs

2

10 G slots or 1 G Ethernet SFP slots

   
Figure 4. C3850-NM-8-10G Network Module



1

Captive screw

Note   

This network module has only one screw. You must fasten the screw completely to secure the module, and loosen the screw first so that the module may be removed.

3

LEDs

2

10 G or 1 G SFP+ slots

   
Figure 5. C3850-NM-2-40G Network Module



1

Captive screws

3

LEDs

2

40 G QSFP+ slots

   
Figure 6. Blank Network Module



1

Blank module

2

Captive screws

Related References

Network Module LEDs

Figure 7. Network Module LEDs

1

G1 LED

3

G3 LED

2

G2 LED

4

G4 LED

Color Network Module Link Status

Off

Link is off.

Green

Link is on; no activity.

Blinking green

Activity on a link; no faults.

Note   

The LED will blink green even when there is very little control traffic.

Blinking amber

Link is off due to a fault or because it has exceeded a limit set in the switch software.

Caution   

Link faults occur when noncompliant cabling is connected to an SFP or SFP+ port. Use only standard-compliant cabling to connect to Cisco SFP and SFP+ ports. You must remove from the network any cable or device that causes a link fault.

Amber

Link for the SFP or SFP+ has been disabled.

Installing a Network Module in the Switch

Safety Warnings

This section includes the installation cautions and warnings. Translations of the safety warnings appear in the Regulatory Compliance and Safety Information for the Catalyst 3850 Switches on Cisco.com: http:/​/​www.cisco.com/​go/​cat3850_​hw

Read this section before you install a network module.


Caution


Proper ESD protection is required whenever you handle equipment. Installation and maintenance personnel should be properly grounded by grounding straps to eliminate the risk of ESD damage to the equipment. Equipment is subject to ESD damage whenever you remove it.



Warning


Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030



Warning


Do not reach into a vacant slot or chassis while you install or remove a module. Exposed circuitry could constitute an energy hazard. Statement 206


Equipment That You Need

  • Ratcheting torque screwdriver with a number-2 Phillips head that exerts up to 15 pound-force inches (lbf-in.) of pressure.

  • Panduit crimping tool with optional controlled-cycle mechanism (model CT-720, CT-920, CT-920CH, CT-930, or CT-940CH).

  • Wire-stripping tools.

  • 12-gauge copper ground wire (insulated or not) for the single-hole ground connection.

  • 8-gauge copper ground wire (insulated or not) for the dual-hole ground connection.

  • Dual-hole ground lug and two screws (included in the DC power supply accessory kit) and single-hole ground lug and screw (included in the switch accessory kit). The dual-hole lug is required for the grounding of the switch in a NEBS installation where the DC supply is the only NEBS compliant power supply option.

  • Four leads of 14-gauge copper wire.

  • Four fork-type terminals from the DC power supply accessory kit. The terminals must be the proper size for M3 screws in a Dinkle DT-35-B25-style terminal block.

Installing Network Modules


Note


The switch can operate without a network module, but a blank module (with no ports or SFP slots) is available and should be installed when uplink ports are not required.

Note


The switch generates logs when you insert or remove a network module with SFP slots.

Use only supported network modules and SFP or SFP+ modules. Each module has an internal serial EEPROM that is encoded with security information. For information about supported SFP modules, see SFP and SFP+ Modules.

The network module is hot-swappable. If you remove a module, replace it with another network module or a blank module.


Note


The switch complies with EMC, safety, and thermal specifications when a network module is present. If no uplink ports are required, install a blank network module.
Before You Begin

When installing network modules, observe these precautions:

  • Do not remove the blank module from the slot unless you are installing an SFP or SFP+ module. Either a module or a dust plug must be in the slot at all times.

  • Do not remove the dust plugs from the fiber-optic SFP modules or the rubber caps from the fiber-optic cable until you connect the cable. The plugs and caps protect the module ports and cables from contamination and ambient light.

  • Removing and installing a network module can shorten its useful life. Do not remove and insert a network module more often than is necessary.

  • To prevent ESD damage, follow your normal board and component handling procedures when connecting cables to the switch and other devices.

Procedure
    Step 1   Attach an ESD-preventive wrist strap to your wrist and to an earth ground surface.
    Step 2   Remove the module from the protective packaging.
    Step 3   Remove the blank module from the switch and save it.
    Caution   

    Verify the correct orientation of your module before installing it. Incorrect installation can damage the module.

    Caution   

    Do not install the network module with connected cables or installed SFP modules. Always remove any cables and modules before you install the network module.

    Caution   

    A module interface might become error-disabled when a network module with connected fiber-optic cables is installed or removed. If an interface is error-disabled, you can reenable the interface by using the shutdown and no shutdown interface configuration commands.

    Step 4   Position the module face up to install it in the module slot. Slide the module into the slot until the back of the module faceplate is flush with the switch faceplate. Fasten the captive screws to secure the network module in place.
    Figure 8. Installing the Network Module in the Switch

    Note   

    Unlike other network modules, the C3850-NM-8-10G cannot be fully inserted and secured until the jackscrew is properly tightened.

    1. Push the module into the uplink slot until the jackscrew connects with the rightmost tab.

    2. You will feel some light resistance, because a spring-loaded tab inside the slot will push back against the C3850-NM-8-10G module

    3. Continue to tighten the jackscrew while gently pushing the front panel of the network module into the slot.


    Network Module Port Configurations

    C3850-NM-4-1G Module

    All ports in the C3850-NM-4-1G module are natively GigabitEthernet and are configured GigabitEthernet1/1/1 though GigabitEthernet1/1/4. There are only four interfaces that are valid, and the other four should not be used even though they still show up in the CLI.

    Table 1 C3850-NM-4-1G Module
    Interface Action

    GigabitEthernet1/1/1

    Configure this interface

    GigabitEthernet1/1/2

    Configure this interface

    GigabitEthernet1/1/3

    Configure this interface

    GigabitEthernet1/1/4

    Configure this interface

    TenGigabitEthernet1/1/1

    Disregard

    TenGigabitEthernet1/1/2

    Disregard

    TenGigabitEthernet1/1/3

    Disregard

    TenGigabitEthernet1/1/4

    Disregard

    C3850-NM-4-10G Module

    All ports in the C3850-NM-4-10G module default to 10 G and should be configured as TenGigabitEthernet1/1/1 through TenGigabitEthernet1/1/4, even when you are operating them as 1 G using SFPs. Only four interfaces are valid; the other four should not be used even though they still show up in the CLI.

    Table 2 C3850-NM-4-10G Module
    Interface Action

    GigabitEthernet1/1/1

    Disregard

    GigabitEthernet1/1/2

    Disregard

    GigabitEthernet1/1/3

    Disregard

    GigabitEthernet1/1/4

    Disregard

    TenGigabitEthernet1/1/1

    Configure this interface

    TenGigabitEthernet1/1/2

    Configure this interface

    TenGigabitEthernet1/1/3

    Configure this interface

    TenGigabitEthernet1/1/4

    Configure this interface

    C3850-NM-2-10G Module

    In the C3850-NM-2-10G module, the first two parts are natively 1-G ports and the last two ports are natively 10-G ports. So, you configure the 1-G posts as GigabitEthernet1/1/1 through GigabitEthernet1/1/2, and configure the last two ports as TenGigabitEthernet1/1/3 through TenGigabitEthernet1/1/4, even when you are operating the last two ports as 1-G. Only four interfaces are valid, and the other four should not be used even though they still show up in the CLI.

    Table 3 C3850-NM-2-10G Module
    Interface Action

    GigabitEthernet1/1/1

    Configure this interface

    GigabitEthernet1/1/2

    Configure this interface

    GigabitEthernet1/1/3

    Disregard

    GigabitEthernet1/1/4

    Disregard

    TenGigabitEthernet1/1/1

    Disregard

    TenGigabitEthernet1/1/2

    Disregard

    TenGigabitEthernet1/1/3

    Configure this interface, even when operating as 1-G

    TenGigabitEthernet1/1/4

    Configure this interface, even when operating as 1-G

    C3850-NM-8-10G Module

    All ports in the C3850-NM-8-10G module default to 10 G and should be configured as TenGigabitEthernet1/1/1 through TenGigabitEthernet1/1/8, even when you are operating them as 1 G using SFP.

    Table 4 C3850-NM-8-10G Module
    Interface Action

    TenGigabitEthernet1/1/1

    Configure this interface

    TenGigabitEthernet1/1/2

    Configure this interface

    TenGigabitEthernet1/1/3

    Configure this interface

    TenGigabitEthernet1/1/4

    Configure this interface

    TenGigabitEthernet1/1/5

    Configure this interface

    TenGigabitEthernet1/1/6

    Configure this interface

    TenGigabitEthernet1/1/7

    Configure this interface

    TenGigabitEthernet1/1/8

    Configure this interface

    C3850-NM-2-40G Module

    The default port connections for the C3850-NM-2-40G module depends on whether you use a 40 G QSFP module or a 4x10G breakout cable.

    If you use a 40 G QSFP module, the ports default to 40 G interfaces. In this case, the 10 G interfaces are displayed but not used.

    Table 5 C3850-NM-2-40G Module with 40 G QSFP Module
    Interface Action

    FortyGigabitEthernet1/1/1

    Configure this interface

    FortyGigabitEthernet1/1/2

    Configure this interface

    TenGigabitEthernet1/1/1

    Disregard

    TenGigabitEthernet1/1/2

    Disregard

    TenGigabitEthernet1/1/3

    Disregard

    TenGigabitEthernet1/1/4

    Disregard

    TenGigabitEthernet1/1/5

    Disregard

    TenGigabitEthernet1/1/6

    Disregard

    TenGigabitEthernet1/1/7

    Disregard

    TenGigabitEthernet1/1/8

    Disregard

    If you use a 4x10G breakout cable, the ports default to 10 G interfaces.

    Table 6 C3850-NM-2-40G Module with 4x10G breakout cable
    Interface Action

    FortyGigabitEthernet1/1/1

    Disregard

    FortyGigabitEthernet1/1/2

    Disregard

    TenGigabitEthernet1/1/1

    Configure this interface

    TenGigabitEthernet1/1/2

    Configure this interface

    TenGigabitEthernet1/1/3

    Configure this interface

    TenGigabitEthernet1/1/4

    Configure this interface

    TenGigabitEthernet1/1/5

    Configure this interface

    TenGigabitEthernet1/1/6

    Configure this interface

    TenGigabitEthernet1/1/7

    Configure this interface

    TenGigabitEthernet1/1/8

    Configure this interface

    Removing a Network Module


    Note


    The switch complies with EMC, safety, and thermal specifications when a network module is present. If no uplink ports are required, install a blank network module.

    Procedure
      Step 1   Attach an ESD-preventive wrist strap to your wrist and to an earth ground surface

      Caution   

      Do not remove the network module with connected cables or installed SFP modules. Always remove any cables and modules before you install the network module.

      Caution   

      A module interface might become error-disabled when a network module with connected fiber-optic cables is installed or removed. If an interface is error-disabled, you can reenable the interface by using the shutdown and no shutdown interface configuration commands.

      Step 2   Disconnect the cables from the SFP modules.
      Step 3   Remove the SFP modules from the network module.
      Step 4   Loosen the captive screws that hold the network module in place.
      Note   

      The C3850-NM-8-10G module is held secure in the switch by only one jackscrew. This screw also helps to eject the module from its connector interface. Before the module can be removed completely, the screw must be unscrewed all the way out. When removing the screw, a spring pushes the module out when the screw is completely disengaged. Ensure that you hold the module securely until it is completely removed.

      Step 5   Carefully press the tab on the right side of the network module to release it. Grasp the edges of the module, and carefully slide it out of the slot.
      Step 6   Install a replacement network module or a blank module in the slot.
      Step 7   Place the module that you removed in an antistatic bag or other protective environment.

      SFP and SFP+ Modules

      Installing SFP and SFP+ Modules

      Before You Begin

      You must have an installed network module to use SFP and SFP+ modules (except for the Catalyst WS-C3850-12S and WS-C3850-24S). The downlink ports on the Catalyst WS-C3850-12S and WS-C3850-24S switch models support standard SFP modules, and the downlink ports on the Catalyst WS-C3850-12XS and WS-C3850-24XS switch models support standard SFP+ modules.

      See the switch release notes on Cisco.com for the list of supported SFP and SFP+ modules. Use only supported SFP modules on the switch. For the latest information about supported SFP and SFP+ modules, refer to the Cisco Transceiver Modules Compatibility Information at http:/​/​www.cisco.com/​en/​US/​products/​hw/​modules/​ps5455/​products_​device_​support_​tables_​list.html

      For information about installing, removing, cabling, and troubleshooting SFP modules, see the module documentation that shipped with your device.

      Observe these precautions:


      Warning


      Class 1 laser product. Statement 1008
      • Do not remove the dust plugs from the SFP modules or the rubber caps from the fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the module ports and cables from contamination and ambient light.
      • Removing and installing an SFP module can shorten its useful life. Do not remove and insert any SFP module more often than is necessary.
      • To prevent ESD damage, follow your normal board and component handling procedures when connecting cables to the switch and other devices.
      Procedure
        Step 1   Attach an ESD-preventive wrist strap to your wrist and to an earth ground surface.
        Step 2   Find the send (TX) and receive (RX) markings that identify the top of the SFP module. On some SFP modules, the send and receive (TX and RX) markings might be shown by arrows that show the direction of the connection.
        Step 3   If the SFP module has a bale-clasp latch, move it to the open, unlocked position.
        Step 4   Align the module in front of the slot opening, and push until you feel the connector snap into place.
        Figure 9. Installing an SFP Module in the Network Module

        Step 5   If the module has a bale-clasp latch, close it to lock the SFP module in place.
        Step 6   Remove the SFP dust plugs and save.
        Step 7   Connect the SFP cables.
        Figure 10. Network Module with SFP Modules Installed


        Removing SFP and SFP+ Modules

        Procedure
          Step 1   Attach an ESD-preventive wrist strap to your wrist and to an earth ground surface.
          Step 2   Disconnect the cable from the SFP module. For reattachment, note which cable connector plug is send (TX) and which is receive (RX).
          Step 3   Insert a dust plug into the optical ports of the SFP module to keep the optical interfaces clean.
          Step 4   If the module has a bale-clasp latch, pull the bale out and down to eject the module. If you cannot use your finger to open the latch, use a small, flat-blade screwdriver or other long, narrow instrument to open it.
          Step 5   Grasp the SFP module, and carefully remove it from the slot.
          Step 6   Place the SFP module in an antistatic bag or other protective environment.

          Finding the Network Module Serial Number

          If you contact Cisco Technical Assistance regarding a network module, you need to know its serial number.

          Figure 11. Network Module Serial Number Location