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Overview
After positioning, anchoring, and connecting bays for an initial 2-bay installation, the backplanes of the adjacent bays are joined (refer to Figure 3-1).
Figure 3-1. 2-Bay Configuration
If this is a 4-bay configuration, first connect the 2 front bays and continue on with the instructions for "Connecting 4-Bay Configurations (TSR 2-Bay to TSR 11)."
Connecting Backplanes - 2-Bay Configuration
The 2-bay configuration requires physically joining the backplanes of the two adjacent bays. Switchable flex connectors join the backplanes of the adjacent bays and provide the connectivity between the bays. Upon initial installation, switchable flex connectors are set to X Not Extended position. As router modules are added to the second bay, the switchable flex connector is set to X Extended to provide the connectivity between the bays. This unique design allows additional bays to be populated incrementally without further hardware installation.
When joining the backplanes of adjacent TSR bays in initial installations, the steps are as follows:
- Remove EMI enclosure from the rear of the adjoining bays.
- Remove loopback connectors from the rear of both of the adjacent bays.
- Install switchable flex connectors between the bays to connect the backplanes.
- Remove switch knobs from flex connectors.
- Label the EMI enclosures and install enclosures over the flex connectors.
- Reattach the switch knobs onto the flex connectors.
- Determine backplane connection locations for the X axes if modules are being installed in the second bay.
- Set the switchable flex connector to X Extended for modules being installed in Bay 3.
- Install and cable router modules in Bay 3.
- Bring up router modules in both bays.
Bay Numbering
In the 2-Bay Configuration, the bays are numbered 1 and 3 in the front (refer to Figure 3-2.)
Figure 3-2. Bay Numbering
Installing the Antistatic Wrist Strap
A grounded antistatic wrist strap must be used while installing components to protect the TSR system from damage caused by static. Use the ESD jack when handling loopbacks, flex connectors, and EMI enclosures. In Series I bays, there are two rear ESD jacks.
PROCEDURE: Use the following procedure to install the antistatic wrist strap:
Step 1 Remove the alligator clip from the grounding pin on the antistatic wrist strap.
Step 2 Insert the grounding pin into the electrostatic discharge (ESD) jack on the rear of the TSR (refer to Figure 3-3).
Step 3 Use the ESD jack while handling EMI enclosures, loopback connectors, and flex connectors.
Figure 3-3. Rear ESD Jack Location
Removing EMI Enclosures
Before removing the loopback connectors from each of the adjacent bays, remove the EMI enclosures on the rear of both bays where the backplanes join.
PROCEDURE: Beginning at the top rear of Bay 1 and working downward, use these steps to remove the EMI enclosures:
Step 1 Use a #2 Phillips screwdriver to loosen the captive screws on the EMI enclosure.
Step 2 Remove the EMI enclosure from the bay.
Step 3 Repeat Step 1 and Step 2 for the remaining three EMI enclosures (refer to Figure 3-4).
Step 4 Repeat Step 1 through Step 3 for the four small EMI enclosures on Bay 3.
Figure 3-4. EMI Enclosure Removal
Removing Loopback Connectors
Loopback connectors positioned on the backplane of the TSR play a role in the optimization of the toroidal mesh. The loopback connector contains the communication among modules within a bay. Before installing the switchable flex connectors, it is necessary remove the loopback connectors from the rear of both of the TSR bays (where adjacent) in the 2-bay configuration.
PROCEDURE: Beginning at the top of Bay 1 and working downward in groups of five, use the following procedure to remove loopback connectors from the bay:
NOTE Exercise care when removing the loopback connectors. Loopbacks must be pulled straight off the TSR bay (refer to Figure 3-5 and Figure 3-6).
Figure 3-5. Loopback Connector
Step 1 Grasp the handle on the loopback connector and firmly pull straight back to remove the loopback (refer to Figure 3-5 and Figure 3-6).
Figure 3-6. Side View of Loopback Removal
Step 2 Repeat Step 1 for the next four loopbacks on Bay 1 (refer to Figure 3-7).
Step 3 Beginning at the top of Bay 3 and working downward in groups of five, repeat Step 1 and Step 2 for the 20 loopbacks on Bay 3.
Figure 3-7. Loopback Removal
Installing Switchable Flex Connectors
Switchable flex connectors physically connect the backplanes of adjacent bays and extend the toroidal mesh by providing the pathway for module communication between adjacent bays. Switchable flex connectors have two possible settings, X Not Extended and X Extended. When in X Not Extended position, communication between modules is restricted to one bay or one backplane. When in X Extended position, communication between modules in adjacent bays is extended to one or more bays or backplanes.
Upon initial installment, all flex connectors must be in the X Not Extended position. In 2-bay configurations, the switch side (X Not Extended position) points toward Bay 1 (refer to Figure 3-10 and Figure 3-12). As router modules are added to adjacent bays, the flex connector switch knob is set to X Extended to allow communication between modules to extend to the adjacent bay. Once installed, switchable flex connectors allow the future addition of router module pairs without additional hardware installation (refer to Figure 3-14). After installation of the flex connectors, a labeled EMI enclosure is installed over each set of five flex connectors. The labeling on the EMI enclosures represents module pathways. The EMI enclosure also allows access to set the switches.
Figure 3-8. Switchable Flex Connector
PROCEDURE: Beginning at the top rear of Bays 1 and 3 and working downward in groups of five, use the following procedure to install the switchable flex connectors between the bays:
NOTE When installing switchable flex connectors, ensure that the switch side faces Bay 1 (refer to Figure 3-10 and Figure 3-14).
Step 1 Remove the protective caps from the bottom of the switchable flex connector.
Step 2 Carefully position the guides of the switchable flex connector onto the guide pins on the backplane connectors on Bay 1 and Bay 3 (refer to Figure 3-9 and Figure 3-10).
Figure 3-9. Switchable Flex Connector Installation - 1
Figure 3-10. Switchable Flex Connector Installation - 2
Step 3 Carefully push the switchable flex connector onto the backplane connectors to seat the connector (refer to Figure 3-10).
Step 4 Repeat Step 1 through Step 3 for the remaining nineteen switchable flex connectors.
Securing EMI Enclosures
After installing the switchable flex connectors, labels are attached to each of the four EMI enclosures. Each label corresponds to a shelf and a module-to-module pathway between bays. When populating in multi-bay configurations, these labels instruct users which communication pathways to switch to X Extended.
Before positioning and securing the EMI enclosure, the switch knob must be removed from each of the flex connectors. A small set screw secures the switch knob on each of the flex connectors. After removing the knobs from each of the flex connectors, secure the corresponding EMI enclosure over each set of five switchable flex connectors and reattach the switch knob.
NOTE EMI enclosures are positioned on bays with the captive fasteners on the right side of the enclosure. Before positioning labels on the EMI enclosures, check to make sure the top of the label is going on the top of the EMI enclosure (refer to Figure 3-14).
PROCEDURE: Beginning at the top of the bays and working downwards, use the following procedure to remove knobs, secure the EMI enclosures, and reinstall the switch knobs:
Step 1 Position the four EMI enclosure labels on the four EMI enclosures with the right side facing up (refer to Figure 3-12).
Step 2 Using a .050 in allen wrench, loosen the set screw on the switchable flex connector and remove the switch knob on the top flex connector (refer to Figure 3-11).
Step 3 Working downward, repeat Step 2 for the next four flex connectors.
Step 4 Position the EMI enclosure with the correct label for the shelf over the top 5 switchable flex connectors between the bays (refer to Figure 3-14.
Step 5 Tighten the four captive fasteners on the EMI enclosure (refer to Figure 3-14.
Step 6 Use two nut plates to secure the EMI enclosure to the studs on Bay 3.
Figure 3-11. Switch Knob Removal
Figure 3-12. EMI Enclosure Labels
Step 7 Using a.050 in allen wrench, reattach the switch knob to the flex connector and tighten the set screw to secure the switch knob. Ensure that the switch side of the flex connector faces Bay 1 (refer to Figure 3-10 and Figure 3-14). Ensure that the set screw tightens against the flat on the switch shaft.
Step 8 Repeat Step 2 through Step 7 for the remaining three sets of flex connectors.
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Figure 3-13. Side View of EMI Enclosure
Figure 3-14. EMI Enclosures Installation
Installing the Thinnet Ethernet
In multi-bay configurations, the installation of a thinnet Ethernet cable connects the bay controller backplanes of adjacent TSRs in multi-bay installations.
2-Bay Configuration
The procedure to install the thinnet Ethernet cable in side-to-side installations is the same whether the installation is a cold installation a or live bay upgrade.
PROCEDURE: Use the following procedure to install the thinnet Ethernet cable to connect bay controller backplanes in side-by-side bays:
Step 1 Remove the terminator BNC connectors from Port 5 on Bay 1 and Port 6 on Bay 3.
Step 2 Connect the thinnet Ethernet cable to the BNC connector on P6 on Bay 3. Connect the other end of the thinnet Ethernet cable to the BNC connector on P5 of Bay 1 (refer to Figure 3-15).
Figure 3-15. Thinnet Ethernet Connection
Populating Bay 3 - Cold Installs
In the initial 2-bay configuration, router module population rules require that Bay 1 be fully populated before installing additional router modules in Bay 3. This mean the switchable flex connectors remain in X Not Extended position until Bay 1 is fully populated.
Router Module Population Rules for Bay 3 - Cold
The location of router modules within the TSR bay creates the "toroidal mesh." It is critical to install router modules in predefined positions. All router modules must be inserted in pairs.
The rules for populating the 2-Bay Configuration with router module pairs is as follows:
- Install router modules in the following slot order:
- 35, 36, 25, 26, 15, 16, 5, 6, 34, 37, 24, 27, 14, 17, 4, 7, 33, 38, 13, 18, 3, 8, 32, 39, 22, 29, 12, 19, 2, 9, 31, 40, 21, 30, 11, 20, 1, 10.
When populating Bay 3, it is necessary to determine the corresponding switchable flex connector providing the pathway for the router module being installed. Installation of router module pairs follows predefined rules. It is critical to install router modules in predefined positions and to open only the path through the switchable flex connector that supports that module pair.
To assist in determining the module to flex connector relationship, each router module installed has a specific slot number. Refer to Figure 3-16. In addition, the switchable flex connector providing the pathway is labeled on the EMI enclosure on the rear of the bay. These numbers show router module pair numbers and predefine the paths between module pairs in adjoining bays. Refer to Figure 3-17.
To aid in understanding this process, the router module pair 35 and 36 serve as an example throughout this section for module installation in Bay 3.
For example, in order to install router module pairs in slots 35 and 36 in Bay 3, it is necessary to turn the switchable flex connector to the X Extended position for this router module pair. For the pair in slots 35 and 36, the switchable flex connector labeled with these router module pairs provides the pathway between the modules. The switch on this flex connector needs to be turned to the X Extended position. Figure 3-16 shows router module positions and Figure 3-17 shows the switch connector in the X Extended position for router modules 35 and 36.
Figure 3-16. TSR Router Module Positions
Figure 3-17. Switchable Flex Connector Numbering
Table outlines the router module pairs and the corresponding locations of the switchable flex connector. Before installing modules, refer to Table and Figure 3-18 "Module Pathway Numbering on EMI Enclosures" to locate the predefined positions of flex connectors.
Figure 3-18. Module Pathway Numbering on EMI Enclosures
Setting the Switchable Flex Connector
When the correct switchable flex connector has been identified for each router module pair being installed, the router module is installed and the switch knob on the flex connector is set to X Extended (refer to Figure 3-17).
Upon initial installation, the switch knob on the switchable flex connector points towards Bay 1, X Not Extended position. In X Not Extended position, there is no communication pathway between the bays. In order to have an communication pathway between modules in the adjoining bays, the switch must be in X Extended position. In X Extended position, connectivity is established and the router modules in Bays 1 and 3 are able to communicate via the X axis.
Each module pair installed in an adjoining bay requires the switch knob to be set to X Extended position to support the communication between the module pairs of both bays. The EMI enclosure label identifies the slot numbers and the X Not Extended and X Extended positions.
PROCEDURE: The general procedure to install modules in Bay 3 and to set the switch knob on the switchable flex connectors is as follows:
Step 1 Following population rules, insert the module pair into the Bay 3. According to the population rules, this is router module pair 35 and 36.
Step 2 Connect fiber optic cabling to installed router module. If this is a SAM module in a TSR bay, install the Ethernet cable.
Step 3 Boot up the modules 35 and 36 in Bay 3.
Step 4 Use the shutdown fabric link command to shut down the fabric link on the X minus axis for modules 35 and X plus for module 36 in Bay 1.
Step 5 Use the end command to return to configuration mode.
router(config)#module 1/35
router(config-module)# shutdown fabric link xminus
router(config)#module 1/36
router(config-module)# shutdown fabric link xplus
Step 6 Determine the corresponding switchable flex connector providing the pathway (X axis) between the bays. Refer to labels on EMI enclosures. For router module pair 35, 36, the connection marked +35/-36 in Bay 3 is the correct switch connector. Refer to Figure 3-17 "Switchable Flex Connector Numbering".
Step 7 Set the switchable flex connector knob to the X Extended position on the flex connector for modules being installed.
Step 8 Use the no shutdown fabric link command to bring up the fabric link on the X minus for router modules 35 and 36 Bay 1.
- For example:
router(config)#module 1/35
router(config-module)# no shutdown fabric link xminus
router(config)#module 1/36
router(config-module)# no shutdown fabric link xplus
The router modules in Bay 3 receive keepalive messages from the router modules in Bay 1 and communication is established.
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Last Updated: 11/26/01 at 15:06:47
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