Field Replaceable Units 编辑

Citrix SD-WAN field replaceable units (FRU) are components that can be quickly and easily removed from the appliance and replaced by the user or a technician at the user’s site. The FRUs for a Citrix SD-WAN appliance include DC or AC power supplies, solid-state or hard-disk drives, and a direct attach cable (DAC).

Note: The solid-state or hard-disk drive stores your configuration information, and it must be restored from a backup after the unit is replaced.

Power supply

For appliances containing two power supplies, the second power supply is optional but recommended . Some appliances can accommodate four power supplies, and require two power supplies as a bare minimum for proper operation. As a best practice, plug in all the power supplies for redundancy.

The appliance ships with a standard power cord that plugs into the appliance’s power supply and a NEMA 5-15 plug on the other end for connecting to the power outlet on the rack or in the wall.

If you suspect that a power-supply fan is not working, please see the description of your platform. On some platforms, what appears to be the fan does not turn, and the actual fan turns only when necessary.

On each power supply, a bicolor LED indicator shows the condition of the power supply.

Electrical safety precautions for power supply replacement

Make sure that the appliance has a direct physical connection to earth ground during normal use. When installing or repairing an appliance, always connect the ground circuit first and disconnect it last.

Never touch a power supply when the power cord is plugged in. As long as the power cord is plugged in, line voltages are present in the power supply even if the power switch is turned off.

Replace an AC power supply

Most Citrix SD-WAN platforms can accommodate two power supplies. Some platforms can accommodate four power supplies. All Citrix SD-WAN appliances function properly with a single power supply, except the appliances that can accomodate four power supplies. These appliances need two power supplies for proper operation. The other power supplies serves as a backup. All power supplies must be of the same type (AC or DC).

Note: If the appliance has only one power supply, you have to shut down the appliance before replacing the power supply. If the appliance has two power supplies, you can replace one power supply without shutting down the appliance, provided the other power supply is working , and if the appliance has four power supplies, you can replace one or two power supplies without shutting down the appliance, provided the other two power supplies are working.

To install or replace an AC power supply on a Citrix SD-WAN appliance:

1. Align the semicircular handle perpendicular to the power supply. Loosen the thumbscrew and press the lever toward the handle and pull out the existing power supply.
2. Carefully remove the new power supply from its box.
3. On the back of the appliance, align the power supply with the power supply slot.
4. Insert the power supply into the slot and press against the semicircular handle until you hear the power supply snap into place.
5. Connect the power supply to a power source. If connecting all power supplies, plug separate power cords into the power supplies and connect them to separate wall sockets.

Note: Citrix SD-WAN appliances emit a high-pitched alert if one power supply fails or if you connect only one power cable to an appliance in which two power supplies are installed. To silence the alarm, press the small red button on the back panel of the appliance. The disable alarm button is functional only when the appliance has two power supplies.

Replace a DC power supply

Most Citrix SD-WAN platforms can accommodate two power supplies. Some platforms can accommodate four power supplies. All Citrix SD-WAN appliances function properly with a single power supply, except the appliances that can accomodate four power supplies. These appliances need two power supplies for proper operation. The other power supplies serves as a backup. All power supplies must be of the same type (AC or DC).

Note: If the appliance has only one power supply, you have to shut down the appliance before replacing the power supply. If the appliance has two power supplies, you can replace one power supply without shutting down the appliance, provided the other power supply is working , and if the appliance has four power supplies, you can replace one or two power supplies without shutting down the appliance, provided the other two power supplies are working.

To install or replace a DC power supply on a Citrix SD-WAN appliance:

1. Loosen the thumbscrew and press the lever towards the handle and pull out the existing power supply.
2. Carefully remove the new power supply from its box.
3. On the back of the appliance, align the power supply with the power supply slot.
4. Insert the power supply into the slot while pressing the lever towards the handle. Apply firm pressure to insert the power supply firmly into the slot.
5. When the power supply is completely inserted into its slot, release the lever.
6. Connect the power supply to a power source. If connecting all power supplies, plug separate power cords into the power supplies and connect them to separate wall sockets.

Solid-state drive

A solid-state drive (SSD) is a high-performance device that stores data in solid-state flash memory. The MPX solid-state drives contain the boot loader configuration file, configuration file (ns.conf), licenses, and for some models, the Citrix SD-WAN software and the user data.

All platforms store the Citrix SD-WAN software on the SSD. The SSD is mounted as /flash.

Replacement solid-state drives (SSDs) contain a pre-installed version of the Citrix SD-WAN software and a generic configuration file (conf), but they do not contain SSL-related certificates and keys, or custom boot settings. Configuration files and customized settings must be restored to a replacement drive from a backup storage location at the customer site, if available.

To replace a solid-state drive:

1. At the Citrix SD-WAN command prompt, exit to the shell prompt. Type:

   shell

2. Shut down the Citrix SD-WAN appliance by typing the following command at the shell prompt:

   shutdown –p now

3. Locate the SSD on the back panel of the appliance. Push the safety latch of the drive cover to the right or down, depending on the platform, while pulling out on the drive handle to disengage. Pull out the faulty drive.

4. Verify that the replacement SSD is the correct type for the platform.

5. Pick up the new SSD, open the drive handle fully to the left or up, and insert the drive into the slot as far as possible. To seat the drive, close the handle flush with the rear of the appliance so that the drive locks securely into the slot.

Important: When you insert the drive, make sure that the Citrix product label is at the top if the drive is inserted horizontally or at the right if the drive is inserted vertically.

1. Turn on the Citrix SD-WAN appliance. When the appliance starts, it no longer has the previous working configuration. Therefore, the appliance is reachable only through the default IP address of 192.168.10.1, or through the console port.
2. Perform the initial configuration of the appliance, as described in Initial Configuration. Log on to the default IP address by using a web browser, or connect to the serial console by using a console cable, to perform the initial configuration.
3. Upload a platform license and any optional feature licenses, including universal licenses, to the Citrix SD-WAN appliance.
4. Once the correct Citrix SD-WAN software version is loaded, you can restore the working configuration.

Hard disk drive

A hard disk drive (HDD) stores logs and other data files. Files stored on the HDD include the newnslog files, dmesg and messages files, and any core/crash files. The HDD comes in various capacities, depending on the Citrix SD-WAN platform. Hard drives are used for storing files required at runtime. An HDD is mounted as /var.

Replace a hard disk drive

A hard disk drive (HDD) stores log files and other user files. Collection of new log files begins upon boot-up with the new HDD.

To install a hard disk drive:

1. At the Citrix SD-WAN command prompt, exit to the shell prompt. Type:

   shell

2. Shut down the Citrix SD-WAN appliance by typing one of the following commands at the shell prompt.

   shutdown –p now

3. Locate the hard disk drive on the back panel of the appliance.

4. Verify that the replacement hard disk drive is the correct type for the Citrix SD-WAN platform.

5. Disengage the hard disk drive by pushing the safety latch of the drive cover to the right or down, depending on the platform, while pulling out on the drive handle to disengage. Pull out the faulty drive.

6. Pick up the new disk drive, open the drive handle fully to the left, and insert the new drive into the slot as far as possible. To seat the drive, close the handle flush with the rear of the appliance so that the hard drive locks securely into the slot.

   Important: When you insert the drive, make sure that the Citrix product label is at the top.

7. Turn on the Citrix SD-WAN appliance. The appliance starts the Citrix SD-WAN software and reads the configuration file.

Note

SD-WAN Standard Edition 400 and 410 appliances do not have field replaceable units. The field replaceable SSD and power supplies are not required.

SD-WAN WANOP/SE 4000 and WANOP 5000 field replaceable units (FRU) are components that can be quickly and easily removed from the appliance and replaced by the user or a technician at the user’s site. The FRUs in an SD-WAN WANOP/SE 4000 and WANOP 5000 appliance can include DC or AC power supplies, and solid-state and hard-disk drives.