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Connecting the EX9251 to External Devices

 

Connecting a Device to a Network for Out-of-Band Management

You can monitor and manage these devices by using a dedicated management channel. Each device has a management port to which you can connect an Ethernet cable with an RJ-45 connector. Use the management port to connect the device to the management device.

Ensure that you have an Ethernet cable that has an RJ-45 connector at either end. Figure 1 shows the RJ-45 connector of the Ethernet cable supplied with the device.

Figure 1: RJ-45 Connector on an Ethernet Cable
RJ-45 Connector
on an Ethernet Cable

To connect a device to a network for out-of-band management (see Figure 2):

  1. Connect one end of the Ethernet cable to the management port (labeled MGMT or ETHERNET) on the device.
  2. Connect the other end of the Ethernet cable to the management device.
Figure 2: Connecting a Device to a Network for Out-of-Band Management
Connecting a Device
to a Network for Out-of-Band Management

Connecting a Device to a Management Console by Using an RJ-45 Connector

You can configure and manage these devices by using a dedicated management channel. Each device has a console port to which you can connect an Ethernet cable with an RJ-45 connector. Use the console port to connect the device to the console server or management console. The console port accepts a cable that has an RJ-45 connector.

Ensure that you have an Ethernet cable that has an RJ-45 connector at either end. One such cable and an RJ-45 to DB-9 serial port adapter are supplied with the device.

Figure 3 shows the RJ-45 connector of the Ethernet cable.

Figure 3: RJ-45 Connector on an Ethernet Cable
RJ-45 Connector
on an Ethernet Cable
Note

If your laptop or PC does not have a DB-9 male connector pin and you want to connect your laptop or PC directly to the device, use a combination of the RJ-45 to DB-9 female adapter supplied with the device and a USB to DB-9 male adapter. You must provide the USB to DB-9 male adapter.

To connect the device to a management console (see Figure 4 and Figure 5):

  1. Connect one end of the Ethernet cable to the console port (labeled CON, CONSOLE, or CON1) on the device.
  2. Connect the other end of the Ethernet cable to the console server (see Figure 4) or management console (see Figure 5).
Figure 4: Connecting a Device to a Management Console Through a Console Server
Connecting a Device to a Management Console Through a Console Server
Figure 5: Connecting a Device Directly to a Management Console
Connecting a Device
Directly to a Management Console

Connecting the EX9251 Switch to External Clocking and Timing Devices

EX9251 switches support external clock synchronization for Synchronous Ethernet and external inputs. The connections to the switch are made through the front panel. Figure 6 shows the ports that are used to connect the switch to external clocking and timing devices.

Figure 6: Ports Used to Connect the Switch to External Clocking and Timing Devices
Ports Used to
Connect the Switch to External Clocking and Timing Devices
  1
PTP grandmaster clock (GM/PTP) port
  4
10 MHz GPS input and output timing ports
  2
BITS ports with LEDs
  5
1PPS GPS input and output timing ports
  3
Time of day (ToD) port with LED
 

Connecting 1-PPS and 10-MHz Timing Devices to the Switch

The switch has four SubMiniature B (SMB) connectors that support 1-PPS and 10-MHz timing devices.

Note

Ensure that a cable of 3 m or less in length is used for the 10-MHz and 1-PPS connectors.

To connect the SMB coaxial cable to the external clocking input port:

  1. Connect one end of the SMB coaxial cable to either the 1-PPS SMB connector or the 10-MHz SMB connector on the switch.
  2. Connect the other end of the SMB coaxial cable to the 10-MHz or 1-PPS source network equipment.Note

    Ensure that the 10-MHz or 1-PPS source network equipment contains low voltage complementary metal oxide semiconductor (LVCMOS) or is compatible with low-voltage (3.3 V) transistor–transistor logic (LVTTL).

Table 1: Clocking Port on an EX9251 Switch

Callout

Label

Description

4 and 5

(See Figure 6)

10MHz

1PPS

GPS input and output ports.

Connecting a Time-of-Day Device to the Switch

A time-of-day port labeled ToD, on the front panel of the switch enables you to connect external timing devices.

To connect the switch to a ToD external timing device:

  1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the switch.
  2. Plug one end of an RJ-45 cable into the ToD port on the front panel of the switch.
  3. Plug the other end of the RJ-45 cable into the ToD timing device.
  4. Verify that the LEDs for the ToD port on the switch are lit steadily green.
  5. Configure the port.

Table 2: Time-of-Day Port on an EX9251 Switch

Callout

Label

Description

3

(See Figure 6)

ToD

ToD RJ-45 port with LED.

Connecting a BITS External Clocking Device to the Switch

The switch has an external building-integrated timing supply (BITS) port, labeled BITS, on the front panel of the switch.

To connect the switch to a BITS external clocking device:

  1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the switch.
  2. Plug one end of an RJ-45 cable into the internal clock port on the front panel.
  3. Plug the other end of the RJ-45 cable into the BITS external clocking device.
  4. Verify that the LEDs for the BITS port are lit steadily green.
  5. Configure the port.

Table 3: BITS Port on an EX9251 Switch

Callout

Label

Description

2

(See Figure 6)

BITS

Building-Integrated Timing Supply (BITS) clock interface port with LED.