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Overview
In the 4-bay configuration, the toroidal mesh of the TSR architecture expands 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 service or port density. Future capacity expansion involves adding new router modules as required to the existing configuration without additional hardware installation (refer to
Figure 5-1. The 4-Bay ConfigurationFigure 5-1).
The upgrade to a 4-bay Configuration may be completed as a one time event or as an extension to an existing 2-bay configuration.The 4-Bay Configuration uses two types of flex connectors, switchable flexes connectors and Y-Cable Connector Cables, to connect the 4 bays together. These flex connectors support the expansion of the architecture of the TSR by providing the pathways (axes) through which the modules communicate.
After positioning, anchoring, and bolting the rear bay frames together, the backplanes of the rear 2 bays are connected using switchable flex connectors. Cable racks are then installed from the front bays to the rear bays (refer to Figure 5-2). The cable racks support the Y-cable connector cables which provide the connectivity from the front to the rear bays. Next, Y-cable connector cables are installed to support communication 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. 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 through which the newly installed modules can communicate.
After the 2 rear bay frames are positioned, anchored, and bolted together, the backplanes of the rear bays are joined.
PROCEDURE: Use this general procedure when preparing to connect the backplanes of the rear bays:
- Remove EMI enclosures located on the rear backplanes of Bay 2 and Bay 4.
- Remove loopback connectors located on the rear backplanes of Bay 2 and Bay 4.
- Install switchable flex connectors between the bays to connect the backplanes of the two rear bays.
- Remove switch knobs from the switchable flex connectors.
- Attach labels to the EMI enclosures and install the EMI enclosures over the switchable flex connectors.
- Reattach the switch knobs on the switchable flex connectors.
- Determine backplane connection locations for the X axes for module pairs being installed
- Set the switchable flex connector 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 handling components to protect the TSR system from damage caused by static. Use the ESD jack when handling loopbacks, flex connectors, and EMI enclosures, and Y-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:
Step 1 Remove the alligator clip from the grounding pin on the antistatic wrist strap.
Step 2 Insert the grounding pin into one of the electrostatic discharge (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 handling EMI enclosures, loopback connectors, flex connectors, and OTT connector 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. Removal of EMI enclosures allows access to loopback connectors (refer to Figure 5-5). After installation of the 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 1 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. TSR II - EMI Enclosure Removal
Removing Loopback Connectors
Loopback connectors on the backplane of the TSR serves as a boundaries for the communication within a bay. In order to expand 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, 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
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 are in the X Not Extended position. In X Not Extended position, the switch side (X Not Extended position) is installed in Bay 4 (refer to Figure 5-10 and Figure 5-11). 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 backplane. 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 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 5-11 and Figure 5-12).
Step 1 Remove the protective plastic caps from the bottom of the flex connector.
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 in the bay as well as module communication pathways between the bays
Before positioning and securing the EMI enclosures, the switch knob must be removed from each of the switchable 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 each of the EMI enclosures, 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 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 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 5-13).
Figure 5-13. EMI Enclosure Labels - Bay 2 and 4
Step 2 Using a .050 in. allen wrench, turn the set screw on the switchable flex connector counter-clockwise to loosen it and remove the switch knob from the flex connector (refer to Figure 5-14).
Step 3 Working downward, repeat Step 2 for the next four flex connectors switch knobs.
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).
Figure 5-14. Switch Knob Removal
Step 5 Tighten the four captive fasteners on the EMI enclosure to the studs on Bay 4 (refer to Figure 5-16).
Step 6 Use two nut plates to secure the EMI enclosure to the studs on Bay 2.
Step 7 Using a .050 inch allen wrench, reattach the switch knob to the flex connector and tighten the set screw to secure the switch knob. Ensure that the set screw tightens against the flat on the switch shaft (refer to Figure 5-12 and Figure 5-16).
Step 8 Repeat Step 2 through Step 7 for the remaining four switch flex connectors in this set.
Step 9 Repeat Step 2 through Step 8 for the remaining three sets of flex connectors.
.
Figure 5-15. Side View of EMI Enclosure Installation
Figure 5-16. EMI Enclosures Installed
Populating Bays 2 and 4
The location of router modules within the TSR bay creates the "toroidal mesh." To maximize the performance of the toroidal mesh, the iinstallation of router modules follows predefined rules.
In the initial 2-bay configuration, router module population rules require that Bays 1 and 3 be fully populated before installing additional router modules in Bays 2 and 4. Until Bays 1 and 3 are fully populated, the switchable flex connectors remain in the X Not Extended position.
To ensure optimization of the toroidal mesh during the upgrade procedure, the X axis between router modules in Bay 2 and Bay 4 are temporarily shut down before setting the switchable flex connector. After the completion of the installation of router modules in Bays 2 and 4, the switchable flex connector is set to the X Extended position.
NOTE It is critical to install router modules family pairs in predefined positions.
Router modules in a TSR II use the bay and slot number as their identifier. For example, in a single-chassis system, module 1/5 identifies the module that resides in chassis 1, slot 5.
CAUTION (C:5-1) Risk of electrostatic damage. When handling modules, wear a grounded antistatic wrist strap or equivalent protection to avoid damaging electrostatic parts.
In addition, the TSR II accepts router modules from two module families. Table 5-1 shows module family designations.
Roman numerals on the faceplate labels of Family 2 router modules identify the modules as belonging to Family 2. Figure 5-17 shows a 4-Port OC-48c faceplate label identifying the module as belonging to Family 2.
Figure 5-17. Family 2 Label Identification
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 that module pair.
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.
The show population command determines the optimum router module population order. The show population command displays configurations supporting an optimized overall population. If the command determines the optimized configuration may be to add modules to the first bay before populating the second bay, this is what is displays. To ensure optimum performance, use the show population command when inserting router modules.
Because each TSR configuration differs due to different ratios of Family 1 and Family 2 modules, use of the the CLI command - show population - is required. The CLI show population command dynamically assesses each configuration and instructs users where to install the next module pair.
Because there may be instances where an installer does not have immediate access to the CLI command line upon installation, this document addresses the initial installation of six four router modules.
NOTE The CLI command show population always takes precedence.
CAUTION (C:5-2) Risk of electrostatic damage. When handling modules, wear a grounded antistatic wrist strap or equivalent protection to avoid damaging electrostatic parts.
The rules for populating the TSR II bay with route controllers and router module pairs are as follows:
- Follow all antistatic precautions while handling and installing modules.
NOTE It is critical to install routing modules and route controller modules in predefined position
- The route controller modules are restricted to slots S1, S2, S3, and S4. When only one route controller is installed, it should be in S4. Slots S3, S2, and S1 should be filled with filler modules.
NOTE The primary route controller is configured with the lowest server ID.
- Secondary route controllers should be installed in slots S3, S2, and then S1, respectively .
- All route controllers are red dot route controllers. The red dot is on the top of the module.
NOTE Do not insert router modules into a dedicated server module slot as this may damage the VHDM connector. If you accidentally insert a router module into a dedicated server slot, you must inspect the VHDM connector for damage prior to inserting the module into a module slot.
- The TSR II accepts only red labled modules. Module color is located on the top of the module and on each slot
- A module is identified by bay number/slot number; i.e., 1/10 would be chassis 1, slot 10.
- Empty server and router slots must be filled with either a router module.
- Initial installations of router modules require the installation of 4 modules per bay. That is, an equal number of modules must be added to each bay simultaneously. The module pairs must be of the same family.
- Router modules must be added in Family pairs. That is, you must install two Family 1 modules OR two Family 2 modules (see Figure 5-18). Roman numerals on the Family 2 module faceplate identify modules as Family 2 modules (see Figure 5-17).
Figure 5-18. Sample Initial Installation of Module
(8 Family 2 Modules)
- Depending on your particular configuration, install the first six router modules following the order outlined in Table 5-2 "Initial Router Module Population:"
NOTE Do not insert router modules into a dedicated server module slot as this may damage the Very HIgh Density Metric (VHDM) connector. If you accidentally insert a router module into a dedicated server slot, you must inspect the VHDM connector for damage prior to inserting the module into a module slot.
- After installation of the first four router modules (per bay), use the show population CLI command - specifying the module family - to identify the next slot to populate.
Example: Use the show population f2 8 command to determine the next slot to be populated for a Family 2 module. The following example shows 8 Family 2 modules.
router#show population f2 8
1. Insert Family 2 into slot 4/33
2. Insert Family 2 into slot 4/38
3. Insert Family 2 into slot 4/23
4. Insert Family 2 into slot 4/28
Module Placement For Bay 2:
1 2 3 4 5 6 7 8 9 10
===========================
Shelf 1 || - - - - - | - - - - - ||
---------------------------
Shelf 2 || - - - - - | - - - - - ||
---------------------------
Shelf 3 || - - N - - | - - N - - ||
---------------------------
Shelf 4 || - - N - - | - - N - - ||
===========================
(-=Empty, P=Present, I=Identified, N=New Module Location, O=Occupied, S=Server, U=Unknown
Module Placement For Bay 4:
1 2 3 4 5 6 7 8 9 10
===========================
Shelf 1 || - - - - - | - - - - - ||
---------------------------
Shelf 2 || - - - - - | - - - - - ||
---------------------------
Shelf 3 || - - N - - | - - N - - ||
---------------------------
Shelf 4 || - - N - - | - - N - - ||
===========================
(-=Empty, P=Present, I=Identified, N=New Module Location, O=Occupied, S=Server, U=Unknown
Refer to IPiori CLI Reference and Configuration Guides (Vol. 1) for further information on the show population command. An the online version of the manual is available at http://www.avici.com/documentation.
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 5-19 for slot numbering in TSR II bays. In addition, the labels on the EMI enclosures denotes the module communication pathway between the bays. These numbers on the TSR backplane predefine the paths between module pairs in adjoining bays (refer to Figure 5-20).
To aid in understanding this process, the router module pairs 35 and 36 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 35 and 36 in both Bay 2 and Bay 4, it is necessary to turn the switchable flex connector to the X Extended 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 +35/-36 in Bay 2 and +36/-35 in Bay 4. The switch on this flex connector providing the communication pathway. With the pathway between the modules set to X Extended, when the modules are brought up in Bays 2 and 4, they will automatically communicate via this pathway. In the 4-Bay Configuration the modules in Bays 2 and 4 are not brought up until the TY-Cable Connectors (OTTs) are installed.
Table 5-3 shows the corresponding switchable flex connector for each router module pair. Refer to Figure 5-19 for router module positions and Figure 5-20 and Figure 5-21 for numbered backplane positions.
NOTE Figure 5-21 "Representation of Numbered Labels on EMI Enclosures" is a representation of the numbers on the EMI enclosure labels. The TSR II backplane is not numbered.
Figure 5-19. TSR II Router Module Positions
Figure 5-20. EMI Enclosure Labels
Table 5-3 outlines the router module pairs and the corresponding locations of the switchable flex connector. Before installing modules, refer to Table 5-3, Figure 5-20, and Figure 5-21 "Representation of Numbered Labels on EMI Enclosures" to locate the predefined positions of switchable flex connectors. Figure 5-21 is a representational image of EMI enclosure labeling.
Figure 5-21. Representation of Numbered Labels on EMI Enclosures
Setting the Switchable Flex Connector
In the 4-bay configuration, switchable flex connectors extend the toroidal 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.
After identifying the correct switchable flex connector for each router module pair being installed, the router module pairs are installed and cabled. The switch knob on the switchable flex connector is then set to X Extended. Because Y-cable connectors still need to be installed, these router modules are not brought up until Y-cable connector installation is complete.
Upon initial installation, the switchable flex connector must be set to X Not Extended position. When the switch is set to X Not Extended position, there is no connectivity between adjacent bays. In order to open the pathway between the bays, the switch must be set to X Extended. With the switch set to X Extended, the modules 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 in both bays. The EMI enclosures covering the switchable flex connectors are labeled to identify the slot numbers and X Not Extended/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 Y-Cable Connectors 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 open (pointing to the left) on the flex connector providing the connectivity.
Step 3 Following population rules, insert the 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 Y-cable connectors. Y-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 Y-cables (refer to Figure 5-22).
Figure 5-22. 4-Bay Configuration (Y-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 Y-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 Y-cables from Bay 1 (front) to Bay 2 (rear).
- Install Y-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.
Installing Cable Racks
Cable racks are installed from the front bays to rear bays to support the Y-cables. The cable rack rests on the rear top of the Breaker Interface Panel (BIP) on TSR II bays. First, a crossbrace support is secured with two bolts to the top of each BIP. Next, the rack ends are positioned inside a metal C bracket which is then secured with bolts to the crossbrace (refer to Figure 5-23).
PROCEDURE: Use the following procedure to install the cable racks from the front bays to the rear bays:
Step 1 Position the crossbrace on the rear top of the BIP of Bay 1 (refer to Figure 5-23).
Step 2 Secure the crossbrace to the BIP using two M12 X 20 hex head cap screws on the outer holes of the crossbrace (refer to Figure 5-23).
Step 3 Repeat Step 1 and Step 2 for the crossbrace on the rear top of Bay 2.
Step 4 Position the cable rack on top rear of the Bay 1 to the top rear of Bay 2. Ensure that the overlap on the top of the bay is equal on both the front and rear bays. Position the metal C bracket on each of the four corners of the rack, lining up the bolts holes in the bracket with holes in the crossbrace.
Step 5 Insert the M10 X 60 bolt into and through the metal bracket into the crossbrace. Install a M10 split lock washer and a M10 Hex nut on the end of the bolt and tighten (refer to Figure 5-24).
Step 6 Repeat Step 4 through Step 4 to secure the remaining three rack ends to the crossbrace.
Step 7 Repeat Step 2 through Step 6 to install the second cable rack from Bay 3 to Bay 4 (refer to Figure 5-23 and Figure 5-24).
Figure 5-23. Cable Rack Installation - 1
Figure 5-24. Cable Rack Installation - 2
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. The longer thinnet Ethernet cable is connected to the bay controller backplane of Bay 1, extended over the cable rack towards Bay 2, and connected to the bay controller backplane of Bay 4 (refer to Figure 5-25 and Figure 5-26).
Figure 5-25. Bay Numbering
.
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 2 and P14 on Bay 4.
Step 2 Insert the BNC connector on the P7 port of the Bay 2, P14 of Bay 14 (refer to Figure 5-27).
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).
Step 4 Remove the terminator cap on P7 of Bay 1 (front row) and P14 on Bay 2 (rear row).
Figure 5-27. Bays 2 and 4 - Thinnet Ethernet Connection
Step 5 Connect the longer thinnet Ethernet cable to the BNC connector on P7 of Bay 1 (refer to Figure 5-28).
Step 6 Dress the cable up and over the cable rack and pull it towards Bay 2 in the rear row (refer to Figure 5-26).
Figure 5-28. Bay 1 to Bay 2 - Thinnet Ethernet Connection
Step 7 Connect the longer thinnet Ethernet cable to the BNC connector on P14 of Bay 2 (refer to Figure 5-27).
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 Y-cables. After installation of router modules and Y-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 5-4 "Backplane Axes Designations."
Table 5-4. Backplane Axes Designations Bays 1 through 4 Router Module Slots Y Axis Designation - Plus or Minus 1-10
Minus
11-20*
Plus
* In Bay 1, slot 11 is occupied by the route controller module.
PROCEDURE: Use the following procedure to temporarily shut down the Y axes in the front bays before installing the Y-cables. Each Y axis is shut down one at a time before installing each OTT connector cable.
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 end command to return to configuration mode.
Step 4 Use the shutdown fabric link command to shut down the fabric link on the Y minus axis for module 1/12.
Step 5 Repeat Step 4 for router modules 1/12 through 1/20
Step 6 Use the end command to return to 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 Y-Cable Connectors
The architecture of the TSR's toroidal mesh extends TSR bays 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
Y-cables connect the backplanes from Bay 1 to Bay 2 and from Bay 3 to Bay 4 and provide connectivity between the bays. In the TSR II bay, backplane slot numbers located on the bottom of the upper backplane (Shelf 1) and the top of the lower backplane (Shelf 2) correspond to router module slot numbering. Refer to Figure 5-31 for router module slot numbering and Figure 5-32 for backplane slot numbering.
Figure 5-30. Y-Cable Connector - 1
Figure 5-31. TSR II - Shelf and Slot Numbering
Figure 5-32. Backplane Slot Numbering
There are three different types of Y-cables used to connect the backplanes of TSR and TSR II bays. Each configuration uses specific Y-cables. Labels on Y-cables indicate which type of bay and which backplane slots it connects (refer to Figure 5-33).l
When connecting two TSR II bays, only one type of cable is used. Figure 5-34 shows the cable connector installed from Shelf 1 of Bay 1 to Shelf 2 of Bay 2.
Figure 5-33. Y-Cable Connectors - 2
Figure 5-34. Y-Cable Connector Installation
Installing Y-Cable Connectors
When installing Y-cables, guide pins located in the backplane slots guide the connectors squarely into the backplane slots. Captive screws then secure the Y-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.
Y-cables are installed from Bay 1 to Bay 2, working from one side of the bay to the other (refer to Figure 5-38). For example, the first Y-cable is installed from slot 1 in Bay 1 to slot 20 in Bay 2. The next Y-cable is installed from slot 20 in Bay 1 to slot 10 in Bay 2 (refer to Figure 5-39). 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 Y-cable 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 Y-cable connector between TSR II bays:
Step 1 Prior to installing each of the connector cables, a visual inspection of the VHDM connectors must be performed. After removing the VHDM protective cap from the end of the connector, carefully inspect the connector for damage such as deformed sockets, holes bewteen socket columns, and deformed guide fins on top and bottom of the socket columns (see Figure 5-35).
NOTE If the VHDM connector has any signs of damage, DO NOT insert it into the backplane. Mark the module as damaged and call TSR-BY-AVICI (877-292-8424) to request an RMA.
Figure 5-35. Y-Cable VHDM Connector
Step 2 Position the first Y-cable labeled "Shelf 1 (-Y) S2 1-5" over the guide pins of the backplane slot 1 (refer to Figure 5-36 and Figure 5-38).
Figure 5-36. Backplane Slot - Guide Pins
Step 3 With the connector on both guide pins, carefully push the Y-cable to seat it into the backplane connector (refer to Figure 5-37).
Step 4 Using an 1/8 inch hex wrench, tighten the four captive screws on the Y-cable connector to the bars on each side of the backplane connector.
Figure 5-37. Y-Cable Connection
Step 5 Take the free end of the Y-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 6 Position this free end of the Y-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 5-38).
Step 7 With the connector on both guide pins, carefully push the Y-cable connector to seat it into the backplane slot.
Step 8 Using an 1/8 inch hex wrench, tighten the four captive screws on the Y-cable connector to the bars on each side of the backplane slot.
Step 9 After removing the protective cap, position the second Y-cable labeled "Shelf 2 (-Y) S2 6-10" over the guide pins of the backplane slot number 10 on Bay 2 (refer to Figure 5-39).
Step 10 With the connector on both guide pins, carefully push the Y-cable connector to seat it into the backplane slot.
Step 11 Using an 1/8 inch hex wrench, tighten the four captive screws on the Y-cable connector to the bars on each side of the backplane slot.
Step 12 Take the free end of the Y-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 1 and down past the last rung behind Bay 1.
Figure 5-38. Y-Cable Connector Installation - 1
Step 13 Position this free end of the Y-cable labeled "Shelf 2 (+Y) S2 11-15" over the guide pins of the backplane slot for slot 10 on Bay 1 (refer to Figure 5-39).
Step 14 With the connector on both guide pins, carefully push the Y-cable connector to seat it into the backplane slot.
Step 15 Using an 1/8 inch hex wrench, tighten the four captive screws on the Y-cable connector to the bars on each side of the backplane slot.
Step 16 Continue installing the connector cables in this manner, repeating Step 2 through Step 15 for each cable connector pair and Table 5-5 "Y-Cable Connections - TSR II Bays for the correct sequence order for installing the cable pairs.
Figure 5-39. Y-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 2 through Step 15 of "Connecting Backplanes - Bay 1 to Bay 2" for each cable connector pair and Table 5-5 "Y-Cable Connections - TSR II Bays for the correct sequence order for installing the cable pairs.
Figure 5-40 shows a 4-bay configuration with all other Y-cable connectors installed.
Figure 5-40. Y-Cable Connectors Installed
Bringing Up the Y Axes - Front to Rear Bays
Upon completion of Y-cable installation, router module pairs are booted 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 5-6 "Module/Y 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 5-6 "Module/Y 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 5-6. Module/Y 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