This document covers the installation and connection of multiple Quarter-rack Scalable Router (QSR) chassis in a single rack. The QSR architecture allows interconnection of up to four QSRs in a single rack.
Before beginning this procedure, carefully inspect the kit package to ensure no damage occurred during shipping or delivery. If you suspect any possible damage, contact Support Services immediately.
For easy and quick reference, this Field Replacement Procedure (FRP) is organized as follows:
Support Services Required Tools Connecting Multiple Chassis Using the Antistatic Wrist Strap Determining Backplane Connection Locations Temporarily Shutting Down Y Axes Removing the QSR Backplane Cover Removing QSR Y-Link Connector Assemblies Adjusting Chassis Rotary Dial Connecting the Thinnet Ethernet Attaching Y-Connector Cables Bringing Up the Y Axes Support Services
Avici offer three ways to obtain information on customer service and training:
- United States Support: 877-292-8424 (TSR-BY-AVICI)
International Support: 01-978-964-2350
- E-mail: support@avici.com
- World Wide Web: http://www.avici.com
Required Tools
Use the following tools for installing multiple chassis and connector cables:
- #5 flat-head screwdriver
- #1 and #2 Phillips screwdriver
Connecting Multiple Chassis
The QSR architecture allows interconnection up to four QSR chassis in a single rack. Installation of connector cables between upper and lower chassis backplanes extend the VelocitiTM fabric and allow module-to-module communication between chassis.
This document covers the connection of QSRs already installed in a rack. Please refer to the QSR Install Guide shipped with each QSR for further information on actual installation.
Figure 1 shows four QSRs in a rack.
Figure 1. Four Chassis - QSR Installation
The basic procedures to connect multiple QSR chassis are the same whether you are connecting two, three, or four chassis. After installing and securing the multiple chassis in the rack, use the procedures in this Field Replacement Procedure (FRP) to connect the chassis.
For instructional purposes, this FRP outlines the installation of a QSR chassis above an existing live chassis. Adjustments for alternate configurations are noted throughout the document.
Connecting multiple chassis involves the following:
- Determining backplane connection locations
- Temporarily shutting down the appropriate Y axes (live upgrades only).
- Removing backplane covers.
- Removing Y-link connector assemblies.
- Adjusting chassis rotary dial.
- Connecting thinnet Ethernet cables between chassis.
- Attaching the Y-connector cables.
- Bringing up the Y axes (live upgrades only).
When connecting chassis in a cold (initial) installation, it is not necessary to shut down the Y axes before connecting the two chassis. Start with the second procedure, "Removing the QSR Backplane Cover" . After making all the appropriate connections, power up and bring up the Y-axes for each chassis.
Using the Antistatic Wrist Strap
Use a grounded antistatic wrist strap to protect the QSR chassis and components from damage caused by static electricity.
PROCEDURE: Use the following steps to attach 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 front or back of the QSR chassis (see Figure 2). Use the ESD jack closest to where you will be working.
Step 3 Put the other end of the wrist strap on your wrist.
Step 4 Keep the wrist strap connected to the ESD jack and on your wrist while handling any QSR components or modules.
Figure 2. Finding the ESD Jacks
Determining Backplane Connection Locations
On the QSR, each slot is numbered 1 through 10. Slot numbers 1 and 10 are preceded by an S, indicating that the slot supports both route controller and router modules (see Figure 3). Each slot has a set of corresponding backplane numbers representing each slot's axis designation (plus or minus). See Figure 4.
Figure 3. QSR Slot Numbering
Before installing Y-cable connectors, the plus or minus Y-link in the live chassis (where connectors attach between chassis) must be temporarily shut down. Arrows in Figure 4 indicate where cable connectors attach. Table 1 "QSR-to-QSR Cable Connections" shows Y-links polarities.
For example, if the bottom QSR chassis is live, shut down the Y-links numbered U1 through U10. If the top QSR chassis is live, shut down the Y-links numbered L1 through L10.
Figure 4. QSR Backplane Numbering
Table 1. QSR-to-QSR Cable Connections Upper QSR Lower QSR U1 (-)
L1 (+)
U2 (-)
L2 (+)
U3 (+)
L3 (-)
U4 (+)
L4 (-)
U5 (+)
L5 (-)
U6 (-)
L6 (+)
U7 (-)
L7 (+)
U8 (-)
L8 (+)
U9 (+)
L9 (-)
U10 (+)
L10 (-)
Temporarily Shutting Down Y Axes
To prepare for Y-cable connector installation, temporarily shut down the Y-axis in the live chassis. Temporarily shutting down the Y axes in the live QSR before installing Y-connector cables maintains the Velociti fabric integrity.
NOTE If neither chassis is live, as in an initial installation, you do not need to shut down the Y axes. For this type of cold install, go to "Removing the QSR Backplane Cover" .
The following procedure temporarily shuts down the Y-axes in a live QSR. Temporarily shutting down the Y-axes allows installation of Y-connector cables without affecting the router's ability to pass traffic. Shut down one Y axis at a time.
Use Table 1 "QSR-to-QSR Cable Connections as a guide when temporarily shutting down the Y-axes. This example assumes the bottom chassis is live.
NOTE If a route controller or filler occupies a slot, it is not necessary to shut down the Y-axes to that slot.
PROCEDURE: Use this procedure to shut down the Y axes on the live lower chassis:
Step 1 Connect a console to the route controller module.
Step 2 In config mode, use the shutdown fabric link CLI command to shut down the appropriate fabric links on the Y axis.
NOTE For information about using CLI commands and configuration, see the IPriori Software Configuration CLI Reference Guides.
- The following example shuts down the fabric links for slots 1 and 10 in the lower (live) chassis.
router(config)#module 1/1
router(config-module)# shutdown fabric link yminus
router(config)#module 1/10
router(config-module)# shutdown fabric link yplus
- The following table specifies which slots are plus or minus.
Step 3 Repeat this command to shut down the link for each slot occupied with a router module in the live chassis (for example, 1/1 through 1/10).
NOTE If a route controller occupies either slot 1/10 or 1/1, disregard Step 3.
Step 4 Use the end command to return to privileged mode.
router(config)#module 1/1
router(config-module)# shutdown fabric link yminus
router(config)#module 1/10
router(config-module)# shutdown fabric link yplus
router(config)#end
Step 5 Once the appropriate Y-axes are shut down, proceed to the next section.
Removing the QSR Backplane Cover
Removal of the backplane covers on the QSR backplane allow access to the backplane slots. When connecting a QSR chassis on top of another chassis, remove the top cover of the bottom chassis and the bottom cover from the top chassis. If connecting a QSR chassis under another chassis, remove the bottom cover from the top chassis and the top cover of the bottom chassis. Leave the other backplane cover in place.
CAUTION (1) To prevent damage to the QSR and its components, always wear a grounded antistatic wrist strap when installing modules. See the "Using the Antistatic Wrist Strap" .
PROCEDURE: Use the following procedure to remove the backplane cover:
Step 1 Attach the antistatic wrist strap to your wrist and the ESD connector on the back of the chassis.
Step 2 Determine which backplane covers to remove, depending on the installation.:
Step 3 Using a #2 Phillips screwdriver, remove the four M3 Phillips screws securing each backplane cover over the upper or lower chassis.
Step 4 Remove the backplane covers (see Figure 5).
Step 5 Keep the screws and cover in a safe place for possible future use.
Figure 5. Removing the Backplane Cover
Removing QSR Y-Link Connector Assemblies
After removal of the backplane covers, the Y-connector assemblies need to be removed.
When connecting two QSRs, remove the appropriate Y-link assembly to allow installation of Y-cable connectors. When connecting a QSR chassis on top of another chassis, remove the top assembly of the bottom chassis and the bottom assembly from the top chassis (see Figure 6).
Figure 6. Removing Adjacent Y-Connector Boards
PROCEDURE: Use the following steps to remove a Y-connector assembly from a QSR:
Step 1 Verify that the antistatic wrist strap you are wearing is properly grounded, or that other antistatic protection is in place.
Step 2 Locate the Y-connector assembly to remove.
Figure 7. Locating the Y-Connector Board and Features
Step 3 Simultaneously press the center of the ejection handles slightly, pull the lock latches, and turn them a quarter turn clockwise to unlock them.
- Figure 8 shows the latches on the bottom Y-connector board.
Figure 8. Unlocking the Lock Latches
Step 4 Open the handles all the way.
CAUTION (2) When performing the next step, use equal pressure and pull the Y-connector assembly straight when removing the board from the back of the unit. Uneven pressure, or turning or twisting the board can damage the connector pins.
Step 5 Holding both handles and using equal pressure, pull the Y-connector assembly away from the chassis and place it on a flat surface, with the handle side facing down.
Figure 9. Opening the Ejection Handles and Removing the Board
Step 6 Return the ejection handles to their closed position, and turn the lock latches to release them and lock the handles in place.
- Store the board in a safe place, handle side down, to prevent damage to the connectors.
NOTE If you replace the Y-connector board, inspect the pins on the backplane for damage or misalignment. If the backplane connector is damaged, contact Customer Support. If the connectors are undamaged, align the edges of the board with the slots and the grooves on the backplane brackets. The slots are keyed to prevent attachment to the wrong connector. Top and bottom Y-connector boards are not interchangeable.
Step 7 Using a flat-head screwdriver, remove the two screws securing each Y-connector board bracket (see Figure 10).
Figure 10. Removing the Brackets
Step 8 Remove the brackets. Store the brackets and Y-connector assemblies in a safe place.
Adjusting Chassis Rotary Dial
The QSR bay controller backplane includes a rotary dial for identifying the physical location of a QSR chassis in the rack (see Figure 12). The QSR hardware and software need to be able to identify each installed chassis
Assign the first chassis installed in the rack the number 1. As you expand and add chassis, give each chassis the next number in the sequence. For example, set the dial to 2 for the second chassis installed; set the dial to 3 for the third; set the dial to 4 for the fourth.
PROCEDURE: Use the following steps to verify or set the rotary number:
Step 1 Remove the three screws securing the I/O cover and remove the cover from both chassis (see Figure 11).
Figure 11. Removing the Rear I/O Cover
Step 2 Locate and check that the arrow on the dial points to the physical location of the chassis in the rack. If not, continue to Step 3.
Step 3 Turn the thumb wheel to change the rotary number. The first chassis is number 1, the second chassis is number 2, the third chassis is number 3, and the fourth chassis is number 4.
Figure 12. Locating the Rotary Dial and Number
Connecting the Thinnet Ethernet
In multiple-chassis configurations, a thinnet Ethernet cable connects the bay controller backplanes of the adjacent QSRs. The procedure to install the thinnet Ethernet cable in top-to-bottom installations is the same for a cold installation or a live upgrade.
PROCEDURE: Use the following procedure to connect the thinnet Ethernet cable:
Step 1 Verify that your wrist strap is properly grounded.
Step 2 Open the P7 BNC connector by turning the knob counter clockwise (see Figure 13).
Step 3 Insert the thinnet Ethernet cable into the P7 BNC connector and turn the knob clockwise to secure the cable in the connector (see Figure 13).
Figure 13. Connecting the Thinnet Ethernet Cable
Step 4 Remove the three screws on the sides of both of the I/O covers and remove the inset as shown in Figure 14.
Figure 14. Removal of Side Inset in I/O Cover
Step 5 Reinstall the I/O covers on both of the chassis, guiding the thinnet Ethernet through the opening created by the removal of the inset (see Figure 15).
Figure 15. Reinstallation of I/O Covers
Connecting the Third and Fourth Chassis
For connecting the Thinnet Ethernet connection for a third and/or fourth chassis, follow the same procedure outlined in "Powering On and Configuring the QSR" ." Figure 16 shows the thinnet Ethernet connection for a three chassis connection and Figure 17 shows the thinnet Ethernet for a four chassis connection.
Figure 16. Thinnet Ethernet for Three Chassis Connection
Figure 17. Thinnet Ethernet for Four Chassis Connection
Attaching Y-Connector Cables
Specially designed cables let you connect QSR backplanes on vertically adjacent chassis in a rack. Y-connector cables provide fabric connectivity between chassis.
The QSR-to-QSR Y-connector cable provides keyed connectors on both ends. Each connector has guide pins to help align the cable connector correctly over the backplane slot and jack screws to secure the connection.
During cable connection, adhere to the following guidelines:
- Always wear a properly grounded wrist strap or other antistatic protection while attaching Y-connector cables.
- Prior to attaching cable connectors, inspect each cable connector and each backplane slot.
- Attach connector cables one at a time.
Avoid electrostatic damage.
When connecting cables, wear a properly grounded antistatic wrist strap or equivalent protection to avoid damaging electrostatic parts.When connecting a QSR to a QSR, attach the connector cable to the backplane slot with the same number. For example, attach a cable between slot (L1+) on the upper QSR to slot (U1-) on the lower QSR (see Figure 18). Use Table 3 "QSR-to-QSR Cable Connections" and Figure 18 as a guide when attaching Y-cable connectors.
Figure 18. QSR Backplane Numbering
- Follow the connection pattern defined in Table 3.
Table 3. QSR-to-QSR Cable Connections Upper QSR Lower QSR U1 (-)
L1 (+)
U2 (-)
L2 (+)
U3 (+)
L3 (-)
U4 (+)
L4 (-)
U5 (+)
L5 (-)
U6 (-)
L6 (+)
U7 (-)
L7 (+)
U8 (-)
L8 (+)
U9 (+)
L9 (-)
U10 (+)
L10 (-)
PROCEDURE: Use the following procedure to install Y-connector cables:
Step 1 Verify that the antistatic wrist strap you are wearing is properly grounded.
CAUTION (3) You must inspect each cable connector and backplane slot before attaching the cable to the QSR. Failure to do so can result in hardware damage.
Step 2 Attach one Y-cable connector to the upper chassis as follows:
- Carefully remove the protective cap from one of the cable connectors. Only remove the protective cap from one end of the cable.
- Inspect the cable connector for deformed sockets, holes between socket columns, and distorted guide fins (see Figure 19).
- Inspect the connector on the QSR backplane for bent pins.
- Align the key and guide pins on the cable connector with the key and guide holes on the backplane slot on the upper chassis (see Figure 20).
- Once aligned, press the connector into the backplane slot to seat it.
- Using a flat-head screwdriver, tighten the jack screws and secure the connection (see Figure 20).
Figure 19. Inspecting Cable Connectors
CAUTION (4) If the connector or slot shows any sign of damage, do not connect the cable to the backplane.
If the cable is damaged, mark it as damaged and call TSR-BY-AVICI (877-292-8424) to request an Return Material Authorization (RMA).
If the backplane connector is damaged, contact Customer Support.Figure 20. Connecting the Y-Connector Cable
Step 3 Attach the second Y-cable connector to the lower chassis as follows:
- Carefully remove the protective cap from the second cable connector.
- Inspect the connector for deformed sockets, holes between socket columns, and distorted guide fins.
- Inspect the connector on the QSR backplane for bent pins.
CAUTION (5) If the connector or slot shows any sign of damage, do not connect the cable to the backplane.
If the cable is damaged, mark it as damaged and call TSR-BY-AVICI (877-292-8424) to request an RMA.
If the backplane connector is damaged, contact Customer Support.
- Align the key and guide pins on the cable connector with the key and guide holes on the backplane slot on the lower chassis.
- Once aligned, press the connector into the backplane slot to seat it.
- Using a flat-head screwdriver, tighten the captive screws on the connector cable to secure it to the backplane.
Figure 21. QSR-to-QSR Cable Connection
Step 4 Repeat Step 2 through Step 3 for the remaining cables.
Bringing Up the Y Axes
After connecting the Y-connector cables, bring up the Y axes on the live QSR. Y axes support communication to the installed modules.
NOTE You do not need to bring up the Y axes on a cold chassis.
According to router module population rules, you installed the first two modules in slots 5 and 6 of the upper QSR. These router modules communicate via the Y axes to router modules 5 and 6 in the lower QSR.
The procedure that follows brings up the Y axes that you shut down before making the hardware connections. These axes support communication between chassis.
Use the CLI command, no shutdown fabric link, to bring up the appropriate Y axes for the router module pairs 5 and 6 in the QSR.
PROCEDURE: Use this procedure to bring up the Y axes and establish the flow of traffic between the router:
Step 1 Connect a console to the route controller module on chassis 1 (if not already connected).
NOTE For information about using CLI commands, see the IPriori Software Configuration and CLI Reference Guides.
Step 2 In config mode, use the no shutdown fabric link CLI command to bring up the Y axes on the for the slots in the lower chassis.
- The following example brings up the Y axes for slots 5 and 6 in chassis 1.
router(config)#module 1/1
router(config-module)# no shutdown fabric link yminus
router(config)#module 1/10
router(config-module)#no shutdown fabric link yplus
Step 3 Repeat Step 2 to bring up all the Y axes from the lower chassis. See Table 2 for Y axes plus and minus polarities.
Step 4 Use the end command to return to privileged mode.
Powering On and Configuring the QSR
When you finish connecting multiple chassis, refer to Ipriori Software Configuration Guide (Vol.1) for information on booting up and configuring the unpowered QSR.
Installing Modules
See the documentation that ships with each module for installation instructions.
Copyright © 2003
Avici Systems Inc.
Avici® and TSR®
is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are
trademarks of Avici Systems Inc.
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Last Updated: 06/27/03 at 13:05:48