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Your AccessPath-TS3 system was configured as you requested before it left the factory. If, however, you want to install or remove the front door of the AccessPath-TS3 system or add or remove Access Server Shelves or Router Shelves later on, use the processes and procedures in this appendix.
The AccessPath-TS3 system is scalable, which means you can expand the number of shelves in the stack as your network needs grow, or remove shelves (for use elsewhere) as you shift traffic to other network segments. For example, if you use the AccessPath-TS3 system for single-channel calls only, you might want to remove the second Router Shelf, replacing it with two Access Server Shelves. Or you might want to swap out two Access Server Shelves for a second Router Shelf to accommodate a heavy Integrated Services Digital Network (ISDN) load.
This appendix has one maintenance section:
In addition, the appendix has four sections on scaling:
The AccessPath-TS3 system is shipped with the rear door installed. This section tells you how to remove the rear door. You may need to remove the AccessPath-TS3 system door to improve ventilation for the shelves or to provide better access to port adapters on the shelves, should you want to remove or replace the port adapters
To remove the rear door, refer to Figure B-1 and follow these steps:
Step 1 Open the door.
Step 2 While holding on to the door, pull down the pin on the top hinge.
Step 3 Remove the top of the door from the cabinet.
Step 4 Lift the bottom edge out and remove the door.
This section guides you through the installation of an additional Access Server Shelf in the AccessPath-TS3 rack and includes the following sections:
 | Warning This unit is intended for installation in restricted access areas. A restricted access area is where access can only be gained by service personnel through the use of a special tool, lock and key, or other means of security, and is controlled by the authority responsible for the location. |
| | Warning Only trained and qualified personnel should be allowed to install or replace this equipment. |
| | Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use. |
| | Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. |
| | Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety. |
| | Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. |
You need the following tools and parts to install the access server:
Step 1 Locate the Access Server Shelf bracket (see Figure B-2). You will use these brackets to secure the Access Server Shelf to the AccessPath rack.
Step 2 Using the screws provided, attach the brackets to each side of the front of the Access Server Shelf. (See Figure B-3.)
Step 3 Slide the Access Server Shelf into the rack using the preinstalled slide rails as guides. (See Figure B-4.)
Step 4 Secure the Access Server Shelf to the rack using screws you provide.
Step 5 Connect the power cord. (See Table 3-5 in Chapter 3 for connection information.)
Step 6 Turn on power to the new Access Server Shelf.
You are now ready to configure the software on the new Access Server Shelf. For software configuration procedures, refer to the Cisco AccessPath-TS3 Integrated Access System Software Configuration Guide or the Cisco AccessPath Manager Configuration Guide.
This section tells you how to remove an Access Server Shelf from the AccessPath rack and includes the following sections:
| | Warning This unit is intended for installation in restricted access areas. A restricted access area is where access can only be gained by service personnel through the use of a special tool, lock and key, or other means of security, and is controlled by the authority responsible for the location. |
| | Warning Only trained and qualified personnel should be allowed to install or replace this equipment. |
| | Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use. |
| | Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. |
| | Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety. |
| | Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. |
You need the following tools and parts to install the access server:
| Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the off position, and tape the switch handle of the circuit breaker in the off position. |
Follow these steps:
Step 1 Turn off power to the Access Server Shelf you want to remove.
Step 2 From the front of the AccessPath-TS3 system, uncable the Access Server Shelf. Remove all data connection and power cables where they enter the Access Server Shelf. Secure the loose data cables to the cable housing.
Step 3 From the back of the system, unbolt the Access Server Shelf from the rack.
Step 4 Remove the Access Server Shelf. (See Figure B-5.)
You are now ready to configure the software on the AccessPath-TS3 system to account for the removal of the Access Server Shelf. For software configuration procedures, refer to the Cisco AccessPath-TS3 Integrated Access System Software Configuration Guide or the Cisco AccessPath Manager Configuration Guide.
This section guides you through the installation of an additional Router Shelf in the AccessPath rack and includes the following sections:
| | Warning This unit is intended for installation in restricted access areas. A restricted access area is where access can only be gained by service personnel through the use of a special tool, lock and key, or other means of security, and is controlled by the authority responsible for the location. |
| | Warning Only trained and qualified personnel should be allowed to install or replace this equipment. |
| | Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use. |
| | Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. |
| | Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety. |
| | Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. |
You need the following tools and parts to install the access server:
If your AccessPath-TS3 system has 11 or 12 Access Server Shelves, you must remove the bottom 2 Access Server Shelves in order to make room for the Router Shelf.
The procedure for adding a Router Shelf includes the following steps:
Figure B-6 through Figure B-8 show the various configurations of the Router Shelf within the AccessPath-TS3 system.
Step 1 Turn off power to the Access Server Shelf you need to remove.
| Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. |
Step 2 From the front of the AccessPath-TS3 system, uncable the eleventh Access Server Shelf. Remove all data connection and power cables where they enter the Access Server Shelf. Secure the loose data cables to the cable housing.
Step 3 From the back of the system, unbolt the Access Server Shelf from the rack.
Step 4 Remove the Access Server Shelf. See Figure B-9.
Step 5 If there is a twelfth Access Server Shelf, remove it using the procedure outlined in Step 1 through Step 4. Otherwise, go to Step 6.
Step 6 Remove the shelf guides between the bottom two Access Server Shelves, so that there is enough space for the new Router Shelf. See Figure B-10.
Installation of the new router shelf involves the following steps:
Step 1 Locate the Router Shelf rack-mount brackets. You will use these brackets to secure the Router Shelf to the AccessPath-TS3 rack. (See Figure B-11.)
Step 2 Using the screws provided, attach the brackets to each side of the back of the Router Shelf, as shown in Figure B-12.
Step 3 Slide the Router Shelf into the rack using the preinstalled slide rails as guides. (See Figure B-13.)
Step 4 Secure the Router Shelf to the rack using screws you provide.
The steps in this section describe the procedure for moving all of the serial lines to the proper port for a two Router Shelf configuration.
You will move the odd-numbered interface connections (which connect to the even-numbered Access Server Shelves) to serial ports on the newly installed Router Shelf.
Step 1 Release the power and connector cables from the ties binding them in the front rails of the rack and connect them as described in Table B-1.
| Take the Cable That Was Connected to | And Connect It to |
|---|---|
| Router Shelf 1, Serial 2/1 | Router Shelf 2, Serial 2/0 |
| Router Shelf 1, Serial 2/3 | Router Shelf 2, Serial 2/1 |
| Router Shelf 1, Serial 3/1 | Router Shelf 2, Serial 2/2 |
| Router Shelf 1, Serial 3/3 | Router Shelf 2, Serial 2/3 |
| Router Shelf 1, Serial 4/1 | Router Shelf 2, Serial 3/0 |
| Router Shelf 1, Serial 5/3 | Router Shelf 1, Serial 3/3 |
| Router Shelf 1, Serial 2/2 | Router Shelf 1, Serial 2/1 |
| Router Shelf 1, Serial 3/0 | Router Shelf 1, Serial 2/2 |
| Router Shelf 1, Serial 3/2 | Router Shelf 1, Serial 2/3 |
| Router Shelf 1, Serial 4/0 | Router Shelf 1, Serial 3/0 |
Step 2 Add a cable to connect the Switch Shelf at port 1/2 to the second Router Shelf at its Fast Ethernet port 1/0. This cable was shipped with the AccessPath-TS3 system and should be labeled "SW - 1/2" at one end and "RS2 - FE 1/0" at the other.
Step 3 AC power connection only. Connect the second Router Shelf's first power supply to the third receptacle from the bottom on the first power strip from the bottom. Connect the second power supply to the third receptacle from the bottom on the second power strip from the bottom.
Step 4 Turn on power to the new Router Shelf.
Now you are ready to configure the software on the new Router Shelf. For software configuration procedures, refer to the Cisco AccessPath-TS3 Integrated Access System Software Configuration Guide or the Cisco AccessPath Manager Configuration Guide.
This section tells you how to remove a second Router Shelf from the AccessPath-TS3 system.
Removal of the second Router Shelf entails removal of the physical device, as well as modifications to the configuration files on all Access Server Shelves in the stack and to the remaining Router Shelf.
This procedure requires that you modify the Access Server Shelves before you physically remove the second Router Shelf from the stack. After the Router Shelf device is physically removed, you will modify the configuration of the remaining Router Shelf to accommodate the Access Server Shelves that were connected to it.
Topics in this section include the following:
| | Warning This unit is intended for installation in restricted access areas. A restricted access area is where access can only be gained by service personnel through the use of a special tool, lock and key, or other means of security, and is controlled by the authority responsible for the location. |
| | Warning Only trained and qualified personnel should be allowed to install or replace this equipment. |
| | Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use. |
| | Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. |
| | Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety. |
| | Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. |
You need the following tools and parts to install the Router Shelf:
The basic procedure is described in the following sections:
Before physically removing the second Router Shelf device, you need to modify the AccessPath-TS3 system's Stack Group Bidding Protocol (SGBP) configuration and the system clock synchronization configuration on all Access Server shelves.
Before physically removing the second Router Shelf device, Telnet to each Access Server Shelf in the AccessPath-TS3 system and perform the following tasks:
Step 1 Remove the SGBP configuration that refers to the Router Shelf you are removing.
In this example, the user enters configuration mode on Access Server Shelf number 6 (nas06), removes the SGBP configuration for the second Router Shelf (offload02), and exits configuration mode.
Step 2 Disable the ntp server configuration on each of the Access Server Shelves.
In the following example, the user enters configuration mode on Access Server Shelf number 6 (nas06), removes the ntp server configuration and exits configuration mode.
This section describes the procedure for moving all of the serial lines to the proper port for a single Router Shelf configuration.
You will move all of the connections to the Access Server Shelves to serial ports on the remaining Router Shelf.
Step 1 Rearrange the cables going into the Router Shelf. Connect the cables as described in Table B-2.
| Take the Cable That was Connected to | And connect it to |
|---|---|
| Router Shelf 2, Serial 2/0 | Router Shelf 1, Serial 2/1 |
| Router Shelf 2, Serial 2/1 | Router Shelf 1, Serial 2/3 |
| Router Shelf 2, Serial 2/2 | Router Shelf 1, Serial 3/1 |
| Router Shelf 2, Serial 2/3 | Router Shelf 1, Serial 3/3 |
| Router Shelf 2, Serial 3/0 | Router Shelf 1, Serial 4/1 |
| Router Shelf 2, Serial 3/1 | Router Shelf 1, Serial 4/3 |
| Router Shelf 1, Serial 2/1 | Router Shelf 1, Serial 2/2 |
| Router Shelf 1, Serial 2/2 | Router Shelf 1, Serial 3/0 |
| Router Shelf 1, Serial 2/3 | Router Shelf 1, Serial 3/2 |
| Router Shelf 1, Serial 3/0 | Router Shelf 1, Serial 4/0 |
| Router Shelf 1, Serial 3/3 | Router Shelf 1, Serial 5/3 |
Step 2 Remove the cable that is connected to the Switch Shelf at port 1/2.
Step 3 Remove the cable and transceivers that connect the Router Shelves to each other.
Step 1 Turn off power to the Router Shelf you want to remove
| | Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. |
Step 2 From the front of the AccessPath-TS3 system, uncable the Router Shelf. Remove all data connection and power cables, detaching them at the point where they enter the Router Shelf. Secure the loose data cables to the cable housing.
Step 3 From the back of the system, unbolt the Router Shelf from the rack.
Step 4 Remove the Router Shelf. (See Figure B-14.)
After recabling the Router Shelf, you must initialize its serial ports 4/0 through 5/3 to accommodate the Access Server Shelves that you have switched over from the removed Router Shelf.
In this example, the user enters configuration mode on Router Shelf number 1 (offload01) and turns on serial interface 4/0:
offload01# configure terminal Enter configuration commands, one per line. End with CNTL/Z. offload01(config)# interface serial4/0 offload01(config-if)# no shutdown offload01(config-if)#
Change the comments on each serial line to reflect the assignments used with a single-offload AccessPath-TS3 system, where, for example, nas01 is connected to Serial 2/0, nas02 to 2/1, nas03 to 2/2, and nas04 to 2/3, nas05 to 3/0.
You have completed the removal of the second Router Shelf on the AccessPath-TS3 system. If you have questions or need assistance, see the section "Related and Referenced Documents" in the preface "About This Guide."
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