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Overview
In the 4-bay configuration, the toroidal mesh of the TSR architecture extends to include 2 rear bays. Without service interruption, the upgrade to a 4-bay configuration allows four bays to operate as one router without loss of port density. Further expansion of the toroidal mesh involves adding new router modules as required to the existing configuration without additional hardware installation (refer to
Figure 5-1. 4-Bay Configuration (TSR to TSR II)Figure 5-1).
The upgrade to a 4-bay configuration may be completed as a one time event or an extension of a 2-bay configuration. The 4-bay configuration uses two types of flex connectors, switchable flexes and Over the Top Connector Cables (OTT), to connect the 4 bays together. These flex connectors support the expansion of the toroidal mesh of the TSR by providing the pathways (axes) through which the modules communicate.
After positioning, anchoring, and bolting the rear bays together, the backplanes of the rear 2 bays are connected using switchable flex connectors (X axis). Cable racks are then installed from the front bays to the rear bays (refer to Figure 5-2). The cable racks support the Over The Top (OTT) cables which provide the connectivity from the front to the rear bays (refer to Figure 5-2). Next, OTT flex connectors cables are installed to complete the expansion of the toroidal mesh to the rear bays.
Figure 5-2. Cable Rack Installed
Connecting Backplanes - Bay 2 to Bay 4
Before joining the front and rear bays, the backplanes of the two rear bays must be joined. Switchable flex connectors join the backplanes of Bay 2 and Bay 4 and provide connectivity between modules in the two bays. Upon initial installation, switch knobs on the switchable flex connectors must be in the X Not Extended position. In 4-bay configurations, the switch side of the flex connector is installed in Bay 4. When in X Not Extended position, communication between modules is restricted to one bay or one backplane. As router module pairs are installed to each of the rear bays, the switchable flex connector is set to X Extended to provide the pathway between the bays.
Connecting Backplanes - Bay 2 and Bay 4
After the 2 rear bays are positioned, anchored, and bolted together, the backplanes of the rear bays (Bay 2 and Bay 4) are joined.
PROCEDURE: Use this general procedure when preparing to connect the backplanes of Bays 2 and 4:
- Remove the top EMI enclosures from the rear of Bay 2 and 4.
- Remove loopback connectors from the rear of the adjoining bays.
- Install switchable flex connectors between the bays to connect the backplanes of the two rear bays.
- Remove switch knobs from flex connectors.
- Attach labels to the EMI enclosures and install the enclosures over the flex connectors.
- Reattach the switch knobs onto the flex connectors.
- Determine backplane connection locations for the X axes for module pairs being installed.
- Set the switchable flex connector knob to X Extended for module pairs being installed.
- Install and cable the two router module pairs - one pair per bay - in the rear bays.
- Boot up the router module pairs in Bays 2 and 4.
Bay Numbering
In Multi-Bay Configurations, the bays are numbered 1 and 3 in the front and 2 and 4 in the rear. Refer to Figure 5-3.
Figure 5-3. Bay Numbering
Installing the Antistatic Wrist Strap
A grounded antistatic wrist strap must be used while installing components to protect the TSR II system from damage caused by electro static discharge. Use the ESD jack when installing loopbacks, flex connectors, EMI enclosures, and OTT cables. In TSR II bays, there are ESD jacks at each shelf level (refer to Figure 5-4).
PROCEDURE: Use the following procedure to install the antistatic wrist strap in TSR II bays:
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 into one of the ESD jacks. There are four ESD jacks on the front of the TSR II, one per shelf (refer to Figure 5-4).
Step 3 Use the ESD jack while installing EMI enclosures, loopback connectors, flex connectors, and OTT cables.
Figure 5-4. TSR II - ESD Jack Locations
Removing EMI Enclosures
Removal of EMI enclosures allows access to loopback connectors. Before joining backplanes, loopback connectors must be removed to allow for the installation of the switchable flex connectors (refer to to Figure 5-5). After installation of the switchable flex connectors, new EMI enclosures are installed.
PROCEDURE: Working downward from the top of Bay 2, use this procedure to remove the EMI enclosures from the 2 rear bays:
Step 1 Hand loosen the seven captive fasteners on the top rear EMI enclosure on the upper backplane (refer to Figure 5-5).
Step 2 Remove the EMI enclosure from the bay.
Step 3 Loosen the seven captive fasteners on the bottom rear EMI enclosure on the lower backplane (refer to Figure 5-5).
Step 4 Repeat Step 1 through Step 3 for the EMI enclosures on Bay 4.
Step 5 Use a #2 Phillips screwdriver to loosen the captive screws on the four small bottom EMI enclosures on Bay 2 and Bay 4 (refer to Figure 5-5). Only the EMI enclosures adjacent to each other are removed.
Figure 5-5. EMI Enclosure Removal
Removing Loopback Connectors
Loopback connectors on the backplane of the TSR serve as boundaries for the communication mesh within a bay. In order to extend communication from one bay to two, loopback connectors must be replaced with switchable flex connectors. Switchable flex connectors provide the pathway between bays for module communication.
PROCEDURE: Working downward from the top of Bay 2, use these steps to remove the loopback connectors:
NOTE Exercise care when removing the loopback connectors. Loopbacks must be pulled straight off the TSR bay. Refer to Figure 5-7 and Figure 5-8.
Figure 5-6. Loopback Connector
Step 1 Grasp the handle on the loopback connector and firmly pull straight back to remove the loopback (refer to Figure 5-6 and Figure 5-7).
Figure 5-7. Side View of Loopback Removal
Step 2 Repeat Step 1 for the next four loopbacks. Refer to Figure 5-8.
Figure 5-8. Loopback Removal - Bays 2 and 4
Step 3 Repeat Step 1and Step 2 for the remaining 15 loopback on Bay 2.
Step 4 Repeat Step 1 through Step 3 for the loopback connectors on Bay 4.
Installing EMI Base Plates
Before installing the switchable flex connectors, EMI base plates must be installed between the bays. In side-to-side configurations, EMI base plates protect against potential EMI interference.
EMI base plates are positioned between the bays before installing switch flex connectors. Studs on the bays (used to hold EMI covers on) hold the base plate in place (refer to Figure 5-9). When the EMI cover is installed, the cover secures the EMI base plates in position.
NOTE When installing the base plates, ensure that the bent edges on the top and bottom of the plate (short edges) face towards the bays. The bent edge of the longer edges faces out from the bay.
PROCEDURE: Beginning at the top rear of Bays 1 and 3, use the following procedure to position the EMI base plates between the bays:
Step 1 Check the orientation of the base plate, ensuring that the top and bottom bent edges are facing towards the bays (refer to Figure 5-9).
Step 2 Position the EMI base plate over the space between the bays, resting it on the studs projecting from the bays.
Step 3 Repeat Step 1 and Step 2 for the remaining three base plates.
Figure 5-9. EMI Base Plate Installation
Installing Switchable Flex Connectors
Switchable flex connectors physically connect the backplanes of Bays 2 and 4 and extend the toroidal mesh by providing the pathway for module communication. 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 X Not Extended position. In 4-bay configurations, the switch side (X Not Extended position) is installed in Bay 4 (refer to Figure 5-11 and Figure 5-12). As router modules are added to adjacent bays or backplanes, the flex connector switch is set to X Extended to allow communication between modules to extend to the adjacent bay or backplanes. Once installed, switchable flex connectors allow the future addition of router module pairs without additional hardware installation.
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.
PROCEDURE: Beginning at the top rear of the bays and working downward in groups of five, use the following procedure to install the switchable flex connectors between Bays 2 and 4:
NOTE When installing switchable flex connectors, ensure that the switch side of the flex connector is installed in Bay 4 (refer to Figure 5-12).
Step 1 Remove the protective plastic caps from the bottom of the flex connector. Each switchable flex connector ships with a protective cover which must be removed before installing.
Step 2 Carefully position the guides of the switchable flex connector onto the guide pins on the backplane connectors on Bays 2 and 4 (refer to Figure 5-10 and Figure 5-11).
Figure 5-10. Switchable Flex Connector
Step 3 Carefully push the switchable flex connector onto the backplane connectors to seat the connector (refer to Figure 5-11 and Figure 5-12).
Figure 5-11. Switchable Flex Connector Installation
Step 4 Repeat Step 1 through Step 3 for the remaining 19 switchable flex connectors.
Figure 5-12. Installation of 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.
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, attach labels to the EMI enclosures, secure the corresponding EMI enclosure over each set of five switchable flex connectors, and reattach the switch knobs.
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 5-13).
PROCEDURE: Beginning at the top of the bays and working downwards, use the following procedure to remove knobs, secure the EMI enclosures, and reattach 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 5-13).
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 5-14).
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 5-16).
Step 5 Tighten the four captive fasteners on the EMI enclosure (refer to Figure 5-16).
Step 6 Use two nut plates to secure the EMI enclosure to the studs on Bay 2.
Figure 5-13. EMI Enclosure Labels - Bay 2 and 4
Step 7 Using a .050 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 is installed in Bay 4 (refer to Figure 5-15 and Figure 5-16). 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.
Figure 5-14. Switch Knob Removal
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Figure 5-15. Side View of EMI Enclosure
Figure 5-16. EMI Enclosures Installed
Populating Bays 2 and 4
In the 4-bay configuration, the installation of router module pairs follows predefined rules. For each router module pair, there is a corresponding backplane connection through the switchable flex connector. It is critical to install router modules in predefined positions and to open only the path through the switchable flex connector that supports each specific module pair.
Router Module Population Rules - Bays 2 and 4
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.
In populating the 4-bay configuration, a router module pair must be inserted in each of the 2 rear bays simultaneously. Furthermore, population rules require that module pairs parallel each other in the 2 rear bays. In other words, identical slots must be populated in both bays simultaneously. Populating the rear bays this way insures optimization of the toroidal mesh.
Router module pairs are represented by a bay number followed by a slot number. Refer to router module installation in either The Terabit Switch Router Install Guide or The Terabit Switch Router Series II Install Guide for specific instructions on installing router modules.
The rules for populating the Bays 2 and 4 with router module pairs is as follows:
- Always install router module pairs in Bays 2 and 4 simultaneously
- Install router modules in the following slot order:
- 2/15, 2/16, 4/15, 4/16
- 2/5, 2/6, 4/5, 4/6
- 2/14, 2/17, 4/14, 4/17
- 2/4, 2/7, 4/4/, 4/7
- 2/13, 2/18, 4/13, 4/18
- 2/3, 2/8, 4/3, 4/8
- 2/12, 2/19, 4/12, 4/19
- 2/2, 2/9, 4/2, 4/9
- 2/11, 2/20, 4/11, 4/20
- 2/1, 2/10, 4/1, 4/10
- 2/35, 2/36, 4/35, 4/46
- 2/25, 2/26, 4/25, 4/26
- 2/34, 2/37, 4/34, 4/37
- 2/24, 2/27, 4/24. 4/27
- 2/33, 2/38, 4/33, 4/38
- 2/23, 2/28, 4/23, 4/28
- 2/32, 2/39, 4/32, 4/39
- 2/22, 2/29, 4/22, 4/29
- 2/31, 2/40, 4/31, 4/40
- 2/21, 2/30, 4/21, 4/30
Determining Backplane Connection Locations
When populating Bays 2 and 4, it is necessary to determine the corresponding switchable flex connector providing the pathway for the router module pairs being installed. It is critical to install router module pairs in the predefined positions and to set to X Extended only the pathway 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 5-17. In addition, the location of each switchable flex connector on the backplane of the TSR is numbered. These numbers on the TSR backplane predefine the paths between module pairs in adjoining bays. Refer to Figure 5-19.
To aid in understanding this process, the router module pairs 15 and 16 serve as an example throughout this section for module installation in both the rear bays.
For example, in order to install router module pairs in slots 15 and 16 in both Bay 2 and Bay 4, it is necessary to turn the switchable flex connector to the open position for these module pairs. For the pair in slots 15 and 16, the pathway between the modules is provided by the switchable flex connector between positions +15/-16 in Bay 2 and +16/-15 in Bay 4. The switch on this flex connector providing this path needs to be switched to open. With the pathway between the modules open, when the modules are brought up in Bays 2 and 4, they will automatically communicate via these axes. In the 4-Bay Configuration the modules are not brought up until the Over the Top Cable Connectors (OTTs) are installed and opened.
Table 5-1 shows the corresponding switchable flex connector for each router module pair. Refer to Figure 5-17 and Figure 5-19 for router module positions, and Figure 5-19 and Figure 5-20 for numbered backplane positions.
NOTE Figure 5-20 is a representation of the numbers on the EMI enclosure labels. The TSR backplane is not numbered.
Figure 5-17. TSR Router Module Positions
Figure 5-18. TSR II Router Module Positions
Figure 5-19. Labeled EMI Enclosures
Table 5-1 outlines the router module pairs and the corresponding locations of the switchable flex connector. Before installing modules, refer to Table 5-1 and Figure 5-20 "Representation of Numbered Labels on EMI Enclosures" to locate the predefined positions of switchable flex connectors. Figure 5-20 is a representational image of EMI enclosure labeling.
Figure 5-20. Representation of Numbered Labels on EMI Enclosures
Setting the Switchable Flex Connector
In the 4-bay configuration, switchable flex connectors extend the torodial mesh of one bay to two by joining the backplanes of bays. In addition, router module population rules support and optimize the expansion to multiple bays. Each router module pair in Bay 2 communicates to its corresponding router module pair in Bay 4 via 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 5-19). Because OTT cable connectors still need to be installed, these router modules are not brought up until OTT cable connector installation is complete.
Upon initial installation, the switch side on the switchable flex connector is installed in Bay 4, 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 2 and 4 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.
In cold installations, the switch is set to X Not Extended position upon initial installation before populating the bays with router module pairs. Next, the switch is set to X Extended and then the router module pairs are installed. In the 4-bay configuration, the router modules are not brought up until the Over the Top Cable Connectors (OTT) are installed.
PROCEDURE: Use the following procedure to set the swtichable flex connector:
Step 1 Determine which switchable connector provides the pathway (X axis) between the module pairs in Bays 2 and 4.
Step 2 Set the switchable flex connector to X Extended on the flex connector providing the connectivity.
Step 3 Following population rules, install and cable the router module pairs into each of the rear bays.
Connecting Bays 1 and 3 to Bays 2 and 4
Connectivity extends from the front to rear bays using Over the Top (OTT) cable connectors. OTT cable connectors extend from the top 2 shelves of the front bays to the top 2 shelves of the rear bays. Cable racks are installed between the bays and support the OTT cables (refer to Figure 5-21).
Figure 5-21. 4-Bay Configuration (OTT cables)
When installing the 4-bay configuration, cable racks must be installed between the front and rear bays. If the front bays in a 4-bay configuration are carrying live traffic, the Y axes in the top two rows of each of the front bays needs to be temporarily shut down before installing OTT cables. Proceeding in this manner maintains the fabric integrity of the torodial mesh during the installation process.
PROCEDURE: The general procedure to connect Bays 1 and 3 to Bays 2 and 4 is as follows:
- Position and install cable racks between the front and rear bays.
- Install the thinnet Ethernet from Bays 1 and 3 to Bays 2 and 4.
- Shut down the Y axis for router modules in the top two rows of both of the front bays.
- Install OTT cables from Bay 1 (front) to Bay 2 (rear).
- Install OTT cables from Bay 3 (front) to Bay 4 (rear)
- Bring up the router module pairs in Bay 2 and Bay 4.
- Bring up the Y axis from Bay 1 to Bay 2 and Bay 3 to Bay 4 for module pairs installed in Bays 2 and 4 only. All other Y axes remain closed.
- Perform diagnostic testing of fabric links to ensure optimization of traffic between the 4 bays. Refer to "Verifying OTT Connections."
Installing Cable Racks
Cable racks are installed from the front bays to rear bays to support the OTT cables. The cable rack rests on the rear top of the TSR bays and on top of the Breaker Interface Panel (BIP) on TSR II bays. Because the BIP on the TSR bay is not exactly level with the top of the TSR bay, a cross brace is secured before positioning the cable rack (refer to Figure 5-22).
PROCEDURE: Use the following procedure to install the cable racks from the front bays to the rear bays:
Step 1 Position the cross brace on the top rear of the BIP of Bay 2, lining up the holes in the cross brace with the bolt holes in the BIP.
Step 2 Secure the cross brace to the BIP using the two M12 X 20 hex head bolts (with split lock washers) using one of the outer holes in the cross brace (refer to Figure 5-22).
Step 3 Position the cable rack from the top of Bay 1 to the top of the cross brace on the rear of the BIP on Bay 2. Ensure that the overlap on the top of the bays is equal on both the front and rear bays.
Step 4 Position the metal bracket on each of the four corners of the rack (refer to Figure 5-24). S brackets are used on Bay 1 (TSR bays) and metal C brackets are used on Bay 2 (TSR II bays).
Step 5 Insert the M10 X 60 bolt into the metal bracket and through the cross brace. Install an M10 split lock washer and M10 hex nut on the end of the bolt and tighten (refer to Figure 5-24).
Step 6 Repeat Step 5 to secure the remaining three rack ends to the bay and cross brace.
Step 7 Repeat Step 1 through Step 6 to install the cable rack from Bay 3 to Bay 4.
Figure 5-22. Cable Rack Cross Brace Installation - 1
Figure 5-23. Cable Rack Bracket Installation - 2
Figure 5-24. Cable Rack Bracket Installation - 3
Installing the Thinnet Ethernet
In multi-bay configurations, the installation of a thinnet Ethernet cable connects the bay controller backplanes of Bays 1 and 3 to the bay controller backplanes of Bays 2 and 4.
In the 4-bay configuration, the short thinnet Ethernet is connected between Bays 2 and 4. Then, the bay controller backplanes of the front 2 bays and the rear 2 bays are connected using a longer thinnet Ethernet cable. The longer thinnet Ethernet cable is connected to the bay controller backplane of Bay 1, extended over the cable rack towards Bay 4, and connected to the bay controller backplane of Bay 4 (refer to Figure 5-27 and Figure 5-27).
Figure 5-25. Bay Numbering
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Figure 5-26. 4-Bay Configuration - Thinnet Ethernet Connection
PROCEDURE: Use the following procedure to install the thinnet Ethernet cable connecting Bay 2 and Bay 4:
Step 1 Remove the terminator caps on P7 on Bay 24 and P14 on Bay 2.
Step 2 Insert the BNC connector on the P7 port of the Bay 2 and P14 of Bay 4.
Step 3 Connect the shorter thinnet Ethernet cable from the BNC connector on port P7 of Bay 2 to the BNC connector on port P14 of the Bay 4 (refer to Figure 5-27).
Figure 5-27. Bays 2 and 4 - Thinnet Ethernet Connection
Step 4 Remove the BNC terminator cap on P6 of Bay 1 (front row) and P14 on Bay 2 (rear row). Refer refer to Figure 5-28 for port locations.
Figure 5-28. Bay 1 to Bay 2 - Thinnet Ethernet Connection
Step 5 Connect the longer thinnet Ethernet cable to the BNC connector on P6 on Bay 1 (refer to Figure 5-28).
Step 6 Dress the cable up and over the cable rack and pull it towards Bay 2.
Step 7 Connect the thinnet Ethernet cable to the BNC connector on port P14 of the Bay 2.
Temporarily Shutting Down the Y Axes
It is necessary to temporarily shut down the Y axis in the top two rows of each of the front bays before installing OTT cables. After installation of router modules and OTT cables, the Y axes in Bays 1 and 3 to the installed router modules in Bays 2 and 4 are brought up. The Y axes not brought up continue to operate in X Not Extended mode within Bays 1 and 3. Proceeding in this manner, maintains the fabric integrity of the torodial mesh of the TSR both during and after the installation process.
Axes within the toroidal mesh have either a plus or a minus designation. Y axes in the top rows of TSR bays have a minus designation and Y axes in the second row of TSR bays have a plus designation. Refer to Table 5-2 "Backplane Axes Designations."
Table 5-2. Backplane Axes Designations Bays 1 through 4Router Module Slots Y Axis Designation - Plus or Minus 1-10
Minus
11-20*
Plus
* In Bay 1, slot 11 is occupied by the server module.
PROCEDURE: Use the following procedure to temporarily shut down the Y axes in the front bays before installing the OTT cables.
The Y axes in the router modules 1 and 12 in Bay 1 are used as an example in the following procedure.
PROCEDURE: Use the CLI command, shutdown fabric link in configuration mode to shutdown the Y axis to temporarily shut down the traffic from the effected router module.
Step 1 Use the shutdown fabric link command to shut down the fabric link on the Y plus axis for module 1/1.
Step 2 Repeat Step 1 for router modules 1/1 through 1/10 and 1/12 through 1/20.
Step 3 Use the shutdown fabric link command to shut down the fabric link on the Y minus axis for module 1/12.
Step 4 Repeat Step 3 for router modules 1/12 through 1/20
Step 5 Use the end command to exit configuration mode.
router(config)#module 1/1
router(config-module)# shutdown fabric link yminus
router(config)#module 1/12
router(config-module)# shutdown fabric link yplus
router(config)#end
Preparing to Install OTT Cable Connectors
The architecture of the TSR's toroidal mesh extends TSR to TSR II bays, both in side-to-side and front to back configurations. Figure 5-29 shows the numbering of TSR bays in the 4-Bay Configuration.
Figure 5-29. 4-Bay Configuration Build out
OTT cables provide the connectivity by connecting the backplanes from Bay 1 to Bay 2 and from Bay 3 to Bay 4 (refer to Figure 5-30). Router module slots in each TSR bay are numbered 1 through 40. Refer to Figure 5-31 for slot numbering in TSR bays, and Figure 5-32 for slot numbering in TSR II bays.
Figure 5-30. Over the Top (OTT) Cable Connector - 1
Figure 5-31. TSR - Shelf and Slot Numbering
In TSR bays, backplane slot numbers are indicated by a diamond shape label located on the bottom of the upper backplane. The top number corresponds to the slot numbers in the top row of TSR bays and the bottom number corresponds to the slot numbers in the second row of the bay. Refer to Figure 5-33 and Figure 5-37.
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Figure 5-32. TSR II - Shelf and Slot NumberingIn the TSR II bay, the corresponding backplane slot numbers are located on the bottom of the upper backplane and the top of the lower backplane. Refer to Figure 5-33.
Figure 5-33. Backplane Slot Numbering
Three types of OTT cable connectors connect the backplanes of TSR and TSR II bays. Refer to Figure 5-34, Figure 5-35, and Figure 5-36. Each type of OTT cable connects a predefined set of modules in an TSR bay to a predefined set of modules in a TSR II bay, or TSR II to TSR II bay. Each OTT cable connector label indicates which bay and backplane slots it connects. Refer to Figure 5-34, Figure 5-35, and Figure 5-36. Figure 5-37 shows a cable connector installed in one of the 5 possible positions.
Figure 5-34. OTT Cable Connector Labels - 1
Figure 5-35. OTT Cable Connectors - 2
Figure 5-36. OTT Cable Connectors - 3
Figure 5-37. OTT Cable Connector Installation
Installing OTT Cable Connectors
When installing OTT cables, guide pins located in the backplane slots guide the connectors squarely into the backplane slots. Captive screws then secure the OTT cable connector to the backplane. For ease of installation, alternate the installation of the cables. For example, cables are first installed from the top shelf of the front bay to the second shelf in the rear bay. Next, cables are installed from the second shelf of the front bay to the top shelf in the rear bay. Installing the cables in this way allows for sufficient space when routing cables over the cable racks.
OTT cables are installed from Bay 1 to Bay 2, working from one side of the bay to the other (refer to Figure 5-40). For example, the first OTT cable is installed from slot 1 in Bay 1 to slot 20 in Bay 2. The next OTT cable is installed from slot 20 in Bay 1 to slot 10 in Bay 2 (refer to Figure 5-41). Installing the cables in this way allows for sufficient space when routing cables over the cable racks.
Connecting Backplanes - Bay 1 to Bay 2
Prepare the OTT connector cables and ensure the protective caps are in place on all the cables. Do not remove the protective caps until the cable is ready to be installed.
PROCEDURE: Beginning with the slot number 1 in Bay 1, use the following procedure to install the OTT cable connector between the bays:
NOTE Before installing cables, double check the label on the OTT cable to be sure it is the correct cable for each particular backplane slot connection.
Step 1 After removing the protective cap, position the first OTT cable labeled "Shelf 1 (-Y) A 1-5" over the guide pins of the backplane slot 1 (refer to Figure 5-38 and Figure 5-40).
Figure 5-38. Backplane Slot - Guide Pins
Step 2 With the connector on both guide pins, carefully push the OTT cable to seat it into the backplane connector (refer to Figure 5-38).
Step 3 Using an 1/8 inch hex wrench, tighten the four captive screws on the OTT cable connector to the bars on each side of the backplane connector.
Figure 5-39. OTT Cable Connection
Step 4 Take the free end of the OTT cable and carefully feed it up and over the first rung of the cable rack attached to Bay 1. Pull the cable end over the rack toward Bay 2 and down past the last rung behind Bay 2.
Step 5 Position this free end of the OTT cable labeled "Shelf 2 (+Y) S2 16-20" over the guide pins of the backplane slot for slot 20 on Bay 2 (refer to Figure 5-40).
Step 6 With the connector on both guide pins, carefully push the OTT cable connector to seat it into the backplane slot.
Step 7 Using an 1/8 inch hex wrench, tighten the four captive screws on the OTT cable connector to the bars on each side of the backplane slot.
Step 8 After removing the protective cap on the next OTT cable, position the second OTT cable labeled "Shelf 2 (+Y) A 11-15" over the guide pins of the backplane slot number 10 on Bay 1 (refer to Figure 5-40).
Step 9 With the connector on both guide pins, carefully push the OTT cable connector to seat it into the backplane slot.
Step 10 Using an 1/8 inch hex wrench, tighten the four captive screws on the OTT cable connector to the bars on each side of the backplane slot.
Figure 5-40. OTT Cable Connector Installation - 1
Step 11 Take the free end of the OTT cable and carefully feed it up and over the first rung of the cable rack attached to Bay 2. Pull the cable end over the rack toward Bay 2 and down past the last rung behind Bay 2.
Step 12 Position this free end of the OTT cable labeled "Shelf 2 (+Y) S2 6-10" over the guide pins of the backplane slot for slot 10 on Bay 2 (refer to Figure 5-41).
Step 13 With the connector on both guide pins, carefully push the OTT cable connector to seat it into the backplane slot.
Step 14 Using an 1/8 inch hex wrench, tighten the four captive screws on the OTT cable connector to the bars on each side of the backplane slot.
Step 15 Continue installing the connector cables in this manner, repeating Step 1 through Step 14 for each cable connector pair and Table 5-3 "OTT Cable Connections - TSR/TSR II Bays for the correct sequence order for installing the cable pairs.
Figure 5-41. OTT Cable Connector Installation - 2
Connecting Backplanes - Bay 3 to Bay 4
Continue installing the connector cables from Bay 3 to Bay 4, following the guidelines outlined in Step 1 through Step 14 of "Connecting Backplanes - Bay 1 to Bay 2" on page 131 for each cable connector pair and Table 5-3 "OTT Cable Connections - TSR/TSR II Bays for the correct sequence order for installing the cable pairs.
NOTE Before installing cables, double check the label on the OTT cable to be sure it is the correct cable for each particular backplane slot connection.
Figure 5-42 shows a 4-bay configuration with all other OTT cable connectors installed.
Figure 5-42. OTT Cable Connectors Installed
Bringing Up the Y Axes - Front to Rear Bays
Upon completion of OTT cable installation, router module pairs are brought up on Bay 3 and 4. Then, the Y axes supporting communication to these installed modules in Bays 2 and 4 are brought back up. First, bring up the modules in Bays 2 and 4. Next, the Y axes supporting communication to the installed modules in Bays 2 and 4 are brought up.
According to router module population rules, the first 4 modules installed in both Bays 2 and 4 are the modules in slots 15 and 16. The router modules pairs, 15 and 16, in Bay 2 and Bay 4 communicate with the router module pairs 5 and 6 in Bay 1 and Bay 3. Refer to Table 5-4 "Module/OTT Connections."
Bringing Up Y Axes
The router module pairs in Bay 1 and 3 (5, 6) directly communicate with the router modules pairs (16, 15) in Bays 2 and 4. Refer to Table 5-4 "Module/OTT Connections."
This procedure brings up the Y axis supporting communication from Bays 1 and 3 to the installed module pairs in Bays 2 and 4.
Table 5-4. Module/OTT Connections Bays 1 and 3(Slot Number) Connects to Bays 2 and 4(Slot Number) 1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
11
10
12
9
13
8
14
7
15
6
16
5
17
4
18
3
19
2
20
1
PROCEDURE: Use the CLI command, no shutdown fabric link to bring up the Y minus axis in router module pairs 5 and 6 in Bays 1 and 3 to initiate the flow of traffic to router modules pairs 15 and 16 in Bays 2 and 4. Refer to Table 5-5 "Y Axes Designations."
Table 5-5. Y Axes Designations Bays 1 through 4(Router Module Slot Numbers) Y Axis Designation (Plus or Minus) 1-10
Minus
11-20*
Plus
Step 1 Use the no shutdown fabric link command to bring up the fabric link on the X minus for the router modules in slots 5 and 6 in Bay 1:
- For example:
router(config)#module 1/5
router(config-module)# no shutdown fabric link yminus
router(config)#module 1/6
router(config-module)#no shutdown fabric link yminus
Step 2 Use the no shutdown fabric link command to bring up the fabric link on the X minus for the router modules in slots 5 and 6 in Bay 3:
- For example:
router(config)#module 3/5
router(config-module)# no shutdown fabric link yminus
router(config)#module 3/6
router(config-module)#no shutdown fabric link yminus
Step 3 Use the end command to exit configuration mode.
Reinstalling EMI Enclosures
Once all the OTT cable connectors are installed, the smaller EMI enclosures are installed on the outer edges of Bays 2 and 4. On all TSR II bays, smaller EMI enclosures are installed on the outer edges of each of the bays. The small EMI enclosures are installed on outer edge of the upper and lower backplanes (refer to Figure 5-43).
PROCEDURE: Use the following procedure to install the four small EMI enclosures to the TSR II bays:
Step 1 Orient the small EMI enclosure on one of the outer set of loopbacks on the upper backplane of Bay 2, lining up the captive screws with the screw holes in the bay frame.
Step 2 Tighten the four captive screws that fasten the EMI enclosure to the bay frame (refer to Figure 5-43).
Step 3 Repeat Step 1 through Step 2 to reattach the remaining EMI enclosures to the lower backplane of Bay 2 (refer to Figure 4).
Step 4 Repeat Step 1 through Step 2 to install the small EMI enclosures to Bay 4 (refer to Figure 5-43).
Figure 5-43. Rear EMI Enclosure Installation - 2
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Last Updated: 11/26/01 at 15:06:50
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