C H A P T E R  3

Rackmounting the SilkWorm 3900, 4100, and 200E Switches

The SilkWorm 3900, 4100, and 200E switches requires that the rails be mounted in a Sun StorEdge 72-Inch Expansion Cabinet or a Sun Rack 900/1000 equipment rack before installation of the switch. Each switch comes with a rackmounting kit.

The 3900 switch is 1.5 RU (rack unit) in height.

The 4100 and 200E switches are 1.0 RU in height.



Note - The three switches have essentially the same dimensions (except for the height) and are mounted with the same procedure.



This chapter contains the following sections:



Note - Some hardware in the rackmounting kit parts list might not be used in this installation.




Installing the Rails

1. Separate the inner and outer slide rails for both slide assemblies by performing the following steps.

a. Pull the inner slide rail out until the lock engages.

b. Depress the lock release lever that is located inside the inner slide rail, and pull the inner slide rail out of the outer slide rail.

2. For the SilkWorm 3900 switch, determine the vertical positioning of the switch in the cabinet before installing the inner slide rails on the switch chassis (FIGURE 3-1).


FIGURE 3-1 SilkWorm 3900 Switch Installed With Additional 0.5 RU Above L-Brackets

The figure shows the SilkWorm 3900 switch installed in the rack.


3. Install the inner slide rails to the SilkWorm 3900, 4100, and 200E switches chassis by performing the following steps on each.

a. Position the inner slide rail with the flat side against the switch.

To allow the power supply side of the switch to slide out of the front of the rack, orient the rail as shown in FIGURE 3-2, with the end containing the lock release lever toward the cable side of the switch.

b. Attach the rail using the Phillips 8-32 x 3/16-inch screws.



caution icon

Caution - Using screws longer than 3/16-inch on the 3900 switch chassis can damage the switch.



c. Tighten the screws to a torque of 15 inch-pounds (17.3 cm-kgs).



Note - The SilkWorm 3900 switch illustrated in FIGURE 3-2has a height of 1.5 RU, whereas the SilkWorm 4100 and 200E switches have a height of 1.0 RU.



FIGURE 3-2 Installing the Inner Rail (Shown With Optional Lower Set of Holes)

The figure shows the installation of the inner slide rails on the SilkWorm 3900, 4100, and 200E switches.


4. Install the rackmount brackets on the inner slide rails by performing the following steps on each.

These rackmount brackets prevent the switch from sliding all the way out of the rack if the rack is accidentally moved.



Note - To meet air flow requirements, the SilkWorm 3900, 4100, and 200E switches are mounted with the cable side facing the back of the cabinet (rack).



a. Position a rackmount bracket at the end of the inner slide rail (the end that does not contain the lock release lever), as shown in FIGURE 3-2.

b. Attach the rackmount bracket to the slide rail using two of the slotted head
8-32 x 3/8-inch screws with a lock nut on the end of each screw.


c. Tighten the screws to a torque of 15 inch-pounds (17.3 cm-kgs).FIGURE 3-3 SilkWorm 3900 Switch and Outer Slide Rail Installation

The figure shows the installation of the outer slide rails on the SilkWorm 3900 switch.


5. Attach two of the three-hole extension slide mount L-brackets to each outer slide rail. See FIGURE 3-3.

Use two of the slotted head 8-32 x 3/8-inch screws per L-bracket, with the screw heads on the inside of the slide rails and a lock nut on the end of each screw.

6. Tighten the screws to a torque of 15 inch-pounds (17.3 cm-kgs).

7. Install the outer slide rails in the rack by performing the following steps on each.

a. Loosen the screws of both of the three-hole extension slide mount L-brackets on the outer slide rail.

b. Position the outer slide rail in the rack and adjust the L-brackets to accommodate the depth of the cabinet. Refer to FIGURE 3-3.

To allow the switch to slide out of the front of the rack, orient the rail as shown in FIGURE 3-3, with the closed end of the slide rail toward the back of the rack.



Note - For racks with a depth greater than 31.50 inches (80 cm), the rear L-brackets must be replaced with the 11-inch (27.9-cm) L-bracket. Adjust the length as required.



c. Re-tighten the screws.

d. Attach the L-bracket on the front end of the outer slide rail to the corresponding rack vertical rail, using two of the Phillips 10-32 x 3/8-inch screws. See FIGURE 3-3.

e. Tighten the screws to a torque of 25 inch-pounds (28.8 cm-kgs).

f. Repeat Steps d and e with the bracket on the back end of the same outer slide rail.

The bracket position can be adjusted to fit the rack. The back end uses three screws.


Installing the SilkWorm 3900, 4100, and 200E Switches

1. Install the switch in the rack by performing the following steps.

a. Position the switch next to the rack as shown in FIGURE 3-3, and insert the inner slide rails into the outer slide rails.

b. Slide the switch into the rack.



Note - A screwdriver might be needed to depress the slide lock on the side of the slide rail when inserting or removing the switch from the rack.



c. Check alignment by sliding the switch in and out of the rack.

If there is any difficulty, pull the switch out of the rack and realign the slide rails.

2. Attach the rackmount brackets to the vertical rack rails using one Phillips 10-32 x 3/8-inch screw per bracket, tightening the screws to a torque of 25 inch-pounds (28.8 cm-kgs). See FIGURE 3-3.

3. (Optional) Provide power to the switch by performing the following steps.

a. Place the power cord clips on the outer slide rails. See FIGURE 3-3.

The clips can be positioned with the tabs above or below the rail.

b. Insert the power cords into the power cord clips with a minimum service loop of six inches at the switch to ensure freedom to plug and unplug the power cord.



caution icon

Caution - Do not plug a power cord into the power source or into the switch power supply until the switch is completely installed in the rack.

Ensure all cables and cords are routed so that they will not be exposed to stress when the switch is moved on the slide rails.



c. Connect the power cords to the switch and to a power outlet.



Note - Always unplug the power cords from the switch before moving it on the slide rails to prevent the cords from being pulled out of the power cord clips.



d. Flip the switch AC power switches to "I".

The SilkWorm 3900 switch automatically performs a power-on self-test (POST).

Refer to the following documents for important information on setting up the switches:



caution icon

Caution - Do not connect the switch to the network until the IP addresses are correctly set.