Installing the BayStack 400-ST1 Cascade Module Part No.
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Introduction This guide provides procedures for installing the BayStack 400-ST1 Cascade Modules into supported Bay Networks BayStack 450 switches that are configured with BayStack 450 software version V1.1.0 or later. You can determine the software version of your switches by accessing the System Characteristics screen for each switch. Note: The BayStack 400-ST1 Cascade Module will not operate with BayStack 450 switches that are configured with BayStack 450 software versions earlier than version V1.1.0.
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Contents of Shipment Each BayStack 400-ST1 shipment includes the following items (Figure 1): • One BayStack 400-ST1 Cascade Module • One .30 meter (12 inch) cascade cable; part number 303978-A. • This guide (Installing the BayStack 400-ST1 Cascade Module). Optional: 1 m (39.27 in.) cascade max-return cable (PN 303979-A) BayStack 400-ST1 cascade module 0.30 m (12 in.) cascade cable (PN 303978-A) Installing the BayStack 400-ST1 Cascade Module BS0030A Figure 1.
If any items are missing or damaged, contact the sales agent or the customer service representative from whom you purchased the BayStack 400-ST1 cascade module. You will need a Phillips screwdriver for the installation. Note: Unless otherwise specified, the terms “switch” and “unit” are used interchangeably in this guide. BayStack 400-ST1 Front Panel Components The front-panel components of the BayStack 400-ST1 Cascade Module are shown in Figure 2. Component descriptions follow the figure.
Cascade A Out Connector Provides an attachment point for connecting this unit to another unit via the cascade cable. A return cable from another unit’s Cascade A Out connector to this unit’s Cascade A In connector completes the stack connection (see the example shown in Figure 3). Note: For stacking three or more units (maximum 8 units per stack), order the optional 1 meter (39.27 inch) cascade max-return cable (Bay Networks Order No. AL2018001).
Cascade A In Connector Provides an attachment point for accepting a cascade cable connection from an adjacent unit in the stack. A return cable from this unit’s Cascade A Out connector to the adjacent unit’s Cascade A In connector completes the stack connection (see the example shown in Figure 3).
Base Unit Description The base unit is a unique stack unit that can be selected by the Unit Select switch on the front-panel of the 400-ST1 cascade module. One unit in the stack configuration must be assigned as the base unit; all other units in the stack must have their Unit Select switch set to Off (see “Unit Select Switch” on page 5). Any single unit in the stack can be assigned as the base unit.
Note: You can renumber the units when you perform the initial setup of the stack as described in the Using the BayStack 450 10/100/1000 Series Switch guide. • Stack IP MAC address --- The stack IP MAC address is automatically assigned during the stack initialization: The base unit’s MAC address, with a software offset, is used for the stack IP MAC address.
• Temporary Base Unit --- If an assigned base unit fails, the next unit in the stack order automatically becomes the new temporary base unit. This change is indicated by the Base LED on the temporary base unit’s LED display panel turning on (yellow). The automatic base unit change to the next unit in the stack order is a temporary safeguard which allows you time to replace the failed unit, or reassign the temporary base unit as the new base unit.
Stack Configurations As shown in Figure 4, the cascade connectors and cables on the 400-ST1 front-panel provide the ability to stack up to eight BayStack switches. With 400-4TX MDAs installed in each switch, the stack can accommodate a maximum of 224 switch ports. Because stack parameters are associated with the base unit (see “Base Unit Description” on page 7), the physical stack order depends on the base unit’s position and whether the stack is configured stack up or stack down.
t Ou 1 Unit 8 Unit 7 Unit 6 Unit 5 Unit 4 Unit 3 Unit 2 Unit 1 2 In 1 = Last unit 2 = Base unit 3 3 = Cascade cable (PN 303978-A) 4 = Cascade max-return cable (PN 303979-A) 4 BS0033A Figure 4.
Unit 1 In 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8 2 O ut 1 = Base unit 3 2 = Last unit 3 = Cascade cable (PN 303978-A) 4 = Cascade max-return cable (PN 303979-A) 4 BS0034A Figure 5.
Certain network management station (NMS) applications assume a stack down configuration for the graphical user interface (GUI) that represents the stack (see Figure 5 on page 12). For this reason, Bay Networks recommends that you always configure the top unit in the stack as the base unit. In any stack configuration, the following applies: • The entire stack powers up as a single logical unit within 30 seconds after the base unit initialization.
Redundant Cascade Stacking Feature BayStack 400-ST1 Cascade Modules allow you to connect up to 8 units into a redundant cascade stack. If any single unit fails or if a cable is accidently disconnected, other units in the stack remain operational, without interruption. Figure 6 shows an example of how a stack configuration reacts to a failed or powered down unit in the stack configuration: a. As shown in Figure 6 unit 3 becomes nonoperational.
Cascade A Out Cascade A In 1 Unit 1 Unit 2 A Unit 3 B Unit 4 Unit 5 2 1 = Base unit 3 2 = Last unit 3 = Cascade cable (PN 303978-A) 4 = Cascade max-return cable (PN 303979-A) 4 BS0035A Figure 6.
Installation This section describes how to connect up to eight BayStack 10/100/1000 Series switches into a redundant stack. The switch stack can consist of any combination of BayStack 450-24T and BayStack 450-12T switch models. Before installing your equipment, review the previous sections of this guide. Note: For stacking three or more units (maximum 8 units per stack), order the optional 1 meter (39.27 inch) cascade max-return cable (Bay Networks Order No. AL2018001).
Installing the 400-ST1 Cascade Module The Cascade Module slot on the BayStack 450 switch can accommodate a single 400-ST1 Cascade Module. To install a 400-ST1 Cascade Module into the Cascade Module slot, follow these steps: 1. Unplug the AC power cord from the back of the switch. 2. Loosen the thumbscrews and remove the filler panel from the Cascade Module slot (Figure 7). 1 = Filler panel 2 = Cascade module slot 1 2 BS0036A Figure 7. 3.
Caution: Be sure that the module slides in on the guides provided. Failure to align the guides could result in bent and broken pins Cascade A Out Unit Select Base Cascade A In BS0037A Figure 8. Installing a 400-ST1 Cascade Module 4. Press the module firmly into the chassis slot. Be sure that the module is fully seated into the mating connector. 5. Secure the module in the chassis by tightening the thumb screws on the module front panel. 6.
Installing and Connecting Multiple Switches The procedure to install and connect multiple switches is similar for tabletop, shelf, or standard 19-inch utility rack installations. To install multiple switches, follow these steps: 1. Install one unit at a time in the rack or on the shelf or tabletop. Refer to the Using the BayStack 450 10/100/1000 Series Switch guide for requirements and instructions for installing the BayStack 450 switch on a tabletop, shelf, or in a standard 19-inch utility rack. 2.
5. Set the Unit Select switch for the base unit to the Base (up = Base) position (Figure 9). 6. Set the Unit Select switch for all other units in the stack to the Off (down = Off) position Only one unit in the stack can be the base unit. Off Unit Select Cascade A Out Base Cascade A In BS0038A Figure 9.
7. Connect the units using the supplied cascade cables (Figure 10). a. Connect one end of a cascade cable to the Cascade A Out connector on the Base Unit (unit 1). 1 Unit 1 Unit 2 Cascade A Out Unit Select Cascade A In Cascade A Out Unit Select Cascade A In Cascade A Out Unit Select Cascade A In Cascade A Out Unit Select Cascade A In 3 Unit 3 2 4 Unit 4 1 = Base unit 2 = Last unit 3 = Cascade cable (PN 303978-A) 4 = Cascade max-return cable (PN 303979-A) BS0039A Figure 10.
b. Connect the other end of the cascade cable to the cascade A In connector on the unit just below the base unit (unit 2), or just above the base unit if cascading up the stack. c. Continue attaching the cascade cables until the last unit is configured. A maximum of eight units can be configured per stack. d. At the last unit in the stack, connect one end of a cascade max-return cable to the Cascade A Out connector.
Connecting Power When the stack is initially powered up, the software automatically assigns unit numbers to the units (the individual switches in the stack). The unit numbers correspond to the physical stack power up/initialization sequence, beginning with the base unit as unit 1. The stack initialization sequence takes approximately 30 seconds for completion.
One or two AC power strips may be required to accommodate the quantity of switches in the stack. 3. Apply power to the AC power strip. Set the AC power strip On/Off switch to On (or connect the AC power strip to a grounded AC power outlet). 4. Proceed to “Verifying the Installation” following this section.
Pwr Cas Up Pwr Cas Up Status Dwn Status Dwn RPSU Base RPSU Base 1 11 12 23 24 BayStack 450-24T Switch Cas 1 = Base unit only 2 = All other units in stack Figure 11. • 2 BS0040A Verifying the Installation The Base LED for the base unit only is on. If one (or more) Base LEDs are blinking, no unit (or more than one unit) is configured as the base unit. If the LEDs on any of the units in the stack are not as shown in Figure 11, cycle the power to the stack and verify the LEDs.
Modifying an Existing Stack Configuration This section provides examples of how to modify an existing stack configuration. The examples assume the stack configuration is operational with connected stations. Always notify the attached stations that there may be a temporary disruption of the network services before you begin the modification. To maintain the unit numbering within the stack, Bay Networks recommends that you renumber the entire stack after any modification involving configuration changes.
Assigning a New Base Unit to the Stack To assign a new base unit to the stack, complete the following steps: Note: Bay Networks recommends that you always configure the top unit in the stack as the base unit. 1. Set the Unit Select switch on the original base unit to the Off position. See Figure 9 on page 20 for details about the Unit Select switch. 2. Set the Unit Select switch on the new base unit to the Base position. 3. Renumber the Stack.
Adding Units to the Stack This section describes how to add one or more units to the middle of a stack or to the end of a stack. Note: Refer to Using the BayStack 450 10/100/1000 Series Switch for information about installing units on a tabletop or in a standard 19-inch utility rack. Adding Units to the Middle of a Stack To add one or more units to the middle of a stack, complete the following steps: 1. Determine the position of the new units in the existing stack (Figure 12).
For tabletop configurations, temporarily move units 1 and 2 to allow space for units 5 and 6. 1 Unit 1 In Unit 2 Unit 3 Unit 4 2 O ut 1 = Base unit 3 2 = Last unit 3 = Cascade cable (PN 303978-A) 4 = Cascade max-return cable (PN 303979-A) 4 BS0041A Figure 12. 4. Adding to Middle of Stack Add the new units to the desired location. For tabletop configurations, replace units 1 and 2 (temporarily moved in Step 4).
5. Reconnect the cascade cable from unit 2 to the Cascade A In connector of (new) unit 5. 6. Connect a cascade cable from the Cascade A Out connector of unit 5 to the Cascade A In connector of unit 6. 7. Connect a cascade cable from the Cascade A Out connector of unit 6 to the Cascade A In connector of unit 3. 8. Renumber the order of the units for the new stack configuration (if desired).
1 Cascade Module Unit 1 In Cascade Module Unit 2 Cascade Module Unit 3 Cascade Module Unit 4 Cascade Module Cascade Module 2 O ut 3 1 = Base unit 2 = Last unit 3 = Cascade cable (PN 303978-A) 4 = Cascade max- return cable (PN 303979-A) 4 BS0042A Figure 13. 2. Adding to End of Stack Disconnect the cascade max-return cable (item 4) from the Cascade A Out connector at unit 4. Leave the other end of the cascade max-return cable connected to the Cascade A In connector at unit 1. 3.
4. Connect a cascade cable from the Cascade A Out connector of unit 4 to the Cascade A In connector of unit 5. 5. Connect a cascade cable from the Cascade A Out connector of unit 5 to the Cascade A In connector of unit 6. 6. Reconnect the cascade max-return cable from unit 1 to the Cascade A Out connector of unit 6. 7. Renumber the order of the units for the new stack configuration (if desired).
Removing/Replacing Adjacent Units To remove/replace adjacent units from an operating stack, complete the following steps (see Figure 14): 1. Remove the cascade cable from the Cascade A Out connector at unit 2. 1 Unit 1 In Cascade A Out Unit 2 Unit 3 Unit 4 Cascade A In Unit 5 Unit 6 2 O ut 1 = Base unit 2 = Last unit BS0043A Figure 14.
2. Remove the cascade cable from the Cascade A In connector at unit 5. 3. Remove the units (units 3 and 4) and install replacement units as required. 4. Renumber the order of the units for the new stack configuration (if desired). You can renumber the unit numbers as described in “Setting Up the Stack Configuration” in the Using the BayStack 450 10/100/1000 Series Switch guide.
5. Repeat Steps 1 to 4 for unit 5. 1 Unit 1 In Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 2 ut O 1 = Base unit 2 = Last unit BS0044A Figure 15. 6. Removing Nonadjacent Units Renumber the order of the units for the new stack configuration (if desired). You can renumber the unit numbers as described in “Setting Up the Stack Configuration” in the Using the BayStack 450 10/100/1000 Series Switch guide.
Upgrading the BayStack 450 Switch Firmware The BayStack 450 switch firmware provides a code load facility that allows you to upgrade the firmware image over any switch port, including any MDA ports. You must upgrade the BayStack 450 switch firmware image before you install the BayStack 400-ST1 Cascade Module. Note: When upgrading the firmware image to software version V1.1.0, you must download two images (the boot code image and the agent image) for proper operation of the switch.
3. After the BayStack 450 boot code image is downloaded, click on Version 1.1.0 at the BayStack 450 agent link. Follow the prompts to download the BayStack 450 agent image. The agent image filename is b4501102.img Be sure to download the BayStack 450 boot code image first, then download the BayStack 450 agent image. Accessing the Latest Documentation If you are upgrading your BayStack 450 switches, be sure to obtain the latest version of the Using the BayStack 450 10/100/1000 Series Switch guide.
• The port connection to the load host cannot be through a MultiLink Trunk. • During the load process, the ports are configured as follows: • Twisted-pair ports: autonegotiation enabled. • Fiber optic ports: 100 Mb/s, half-duplex. • Gigabit MDA ports: autonegotiation disabled, Preferred Phy set to Right. For detailed information about downloading a new software image, see “Chapter 3, “Using the Console Interface,” in the Using the BayStack 450 10/100/1000 Series Switch guide.
