Maintaining the Cisco uBR7200 Series

The following is a functional description of OIR; for specific procedures to install or replace a port adapter or cable modem card, refer to the appropriate configuration note.

Note Detailed instructions for installing and configuring the Cisco cable modem cards are contained in the document Cisco uBR7200 Series Universal Broadband Router Cable Modem Card Hardware Installation (Cisco document number 78-10494-01). This document accompanies every cable modem card that is shipped from the factory as an installed item in a Cisco uBR7200 series or as a field-replaceable unit (FRU). For detailed instructions to install and configure port adapters, refer to the applicable Cisco uBR7200 series port adapter installation and configuration document.

Caution The network processing engine, the I/O controller, and the clock card are required system components that cannot be removed if the universal broadband router is operating. Removing the network processing engine, the I/O controller, or the clock card while the Cisco uBR7200 series is operating will cause the universal broadband router to shut down or crash, and might damage or destroy memory files.

Each port adapter and cable modem card has a bus connector that connects it to the universal broadband router's midplane. Each midplane connector has a set of tiered pins in three lengths. The pins send specific signals to the system as they make contact with the port adapter or modem card. The system assesses the signals it receives and the order in which it receives them to determine if a board is being removed or inserted into the midplane. From these signals, the system determines whether to reinitialize a new interface or shut down a removed interface. For example, when inserting a port adapter, the longest pins make contact with the port adapter first, and the shortest pins make contact last. The system recognizes the signals and the sequence in which it receives them.

When you remove or insert a port adapter or cable modem card in a Cisco uBR7200 series, the midplane pins send signals to notify the system, which then performs as follows:

1. Rapidly scans the midplane for configuration changes.

2. Initializes all newly inserted port adapters and modem cards, noting any removed interfaces and placing them in the administratively shutdown state.

3. Brings all previously configured interfaces on the port adapter or cable modem card back to the state they were in when they were removed. Any newly inserted interfaces are put in the administratively shutdown state, as if they were present (but not configured) at boot time. If a similar port adapter or modem card type is reinserted into a slot, its ports are configured and brought online up to the port count of the original port adapter or cable modem card.

You can remove and replace a cable modem card or port adapter with the same type of component without interrupting the system. To replace a cable modem card or port adapter with a different type of card or port adapter (for example, hot swapping from an MC16B to an MC16C or replacing a HSSI adapter with an ATM adapter), you will need to copy your startup configuration to your running configuration on the Cisco uBR7200 series in order to enable the interfaces on the new cable modem card or port adapter.

Table 6-1: Typical Processor-Monitored Temperature Thresholds for the Cisco uBR7223

Parameter	High Warning	High Critical	Shutdown
Chassis inlet	104 degrees Fahrenheit (40 degrees Celsius)	122 degrees Fahrenheit (50 degrees Celsius)	-
Chassis outlet 1	109 degrees Fahrenheit (43 degrees Celsius)	127 degrees Fahrenheit (53 degrees Celsius)	136 degrees Fahrenheit (58 degrees Celsius)
Chassis outlet 2	167 degrees Fahrenheit (75 degrees Celsius)	167 degrees Fahrenheit (75 degrees Celsius)	-
Chassis outlet 3	131 degrees Fahrenheit (55 degrees Celsius)	149 degrees Fahrenheit (65 degrees Celsius)	158 degrees Fahrenheit (70 degrees Celsius)

Table 6-2: Typical Processor-Monitored Temperature Thresholds for the Cisco uBR7246 VXR and Cisco uBR7246

Parameter	High Warning	High Critical	Shutdown
Chassis inlet	104 degrees Fahrenheit (40 degrees Celsius)	122 degrees Fahrenheit (50 degrees Celsius)	-
Chassis outlet 1	109 degrees Fahrenheit (43 degrees Celsius)	127 degrees Fahrenheit (53 degrees Celsius)	136 degrees Fahrenheit (58 degrees Celsius)
Chassis outlet 2	167 degrees Fahrenheit (75 degrees Celsius)	167 degrees Fahrenheit (75 degrees Celsius)	-
Chassis outlet 3	131 degrees Fahrenheit (55 degrees Celsius)	149 degrees Fahrenheit (65 degrees Celsius)	158 degrees Fahrenheit (70 degrees Celsius)
Chassis outlet 4	131 degrees Fahrenheit (55 degrees Celsius)	149 degrees Fahrenheit (65 degrees Celsius)	158 degrees Fahrenheit (70 degrees Celsius)
Chassis outlet 5	131 degrees Fahrenheit (55 degrees Celsius)	149 degrees Fahrenheit (65 degrees Celsius)	158 degrees Fahrenheit (70 degrees Celsius)

Table 6-3: Typical Power Supply-Monitored DC-Voltage Thresholds

Sample Point	Low Critical	Low Warning	High Warning	High Critical
+3.5V	+3.32V	+3.34V	+3.66V	+3.68V
+5.2V	+4.97V	+4.99V	+5.45V	+5.48V
+12.2V	+11.42V	+11.52V	+12.85V	+12.90V
-12.2V	-11.33V	-11.43V	-12.74V	-12.84V
+16.0V	+15.15V	+15.30V	+19.65V	+19.85V
-16.0V	-15.15V	-15.30V	-19.65V	-19.85V

If the air temperature exceeds a defined threshold, the system controller displays warning messages on the console terminal and, if the temperature exceeds the shutdown threshold, it shuts down the system. The system stores the present parameter measurements for both temperature and DC voltage in NVRAM, so that you can retrieve them later as a report of the last shutdown parameters.

Router# show environment
 
All measured values are normal
 

If the environmental status is not normal, the system reports the worst-case status level. Following is an example overvoltage warning:

Router# show environment
Warning: +3.45 V measured at +3.83 V
 

Following is sample output of the show environment last command for a Cisco uBR7246:

Router# show environment last
 
Temperature readings:
chassis inlet      previously measured at 23C/73F
chassis outlet 1   previously measured at 26C/78F
chassis outlet 2   previously measured at 32C/89F
chassis outlet 3   previously measured at 41C/105F
chassis outlet 4   previously measured at 21C/69F
chassis outlet 5   previously measured at 21C/69F
 
Voltage readings:
+3.5 V             previously measured at +3.57
+5.2 V             previously measured at +5.16
+12.2 V            previously measured at +12.26
-12.2 V            previously measured at -12.41
+16 V              previously measured at +17.01
-16 V              previously measured at -17.33
 
Reason for last shutdown:
power supply
 

Note Because the example above is specific to the Cisco uBR7246, you might notice a difference in the output for your Cisco uBR7246 VXR or Cisco uBR7223.

Following is sample of the show environment all command for a Cisco uBR7246:

Router# show environment all
 
Power Supplies:
Power supply 1 is empty.
Power supply 2 is Zytek DC Power Supply. Unit is on.
 

Temperature readings:
chassis inlet    measured at 23C/73F 
chassis outlet 1 measured at 25C/77F 
chassis outlet 2 measured at 32C/89F 
chassis outlet 3 measured at 41C/105F 
chassis outlet 4 measured at 46C/114F 

Voltage readings:
+3.5 V  measured at +3.59 V 
+5.2 V  measured at +5.22 V 
+12.2 V measured at +12.29 V 
-12.2 V measured at -12.39 V 
+16 V   measured at +15.46 V 
-16 V   measured at -18.29 V 
 

Note Because the example above is specific to the Cisco uBR7246, you might notice a difference in the output for your Cisco uBR7246 VXR or Cisco uBR7223.

If the system does shut down because the temperature exceeded the shutdown threshold, the system will display the following message on the console screen and in the environment display when the system restarts:

Queued messages:
%ENVM-1-SHUTDOWN: Environmental Monitor initiated shutdown
 

Step 2 Grasp the card and pull it from the slot.

Step 3 Place the card in an antistatic bag.

Note To avoid potential problems when inserting spare Flash memory cards in your Cisco uBR7200 series, Cisco recommends that you reformat all of your Flash memory cards on a Cisco uBR7200 series running Cisco IOS Release 12.0(5)T1 or later, during your regularly scheduled service times. The "Reformatting a Flash Memory Card" section contains instructions that explain how to reformat a Flash memory card.

Caution The following formatting procedure erases all information on the Flash memory card. To prevent the loss of important data that might be stored on a Flash memory card, proceed carefully. If you want to save the data on a Flash memory card, copy the data to a server before you format the card.

Note The following procedure assumes you have already booted your Cisco uBR7200 series.

To format a new Flash memory card:

• You have an I/O controller with a good image in the onboard Flash memory single inline memory module (SIMM) so you can start the Cisco uBR7200 series universal broadband router.

• The bootable image you want to copy to the Flash memory card exists on a Trivial File Transfer Protocol (TFTP) server to which you have access (meaning you know its name and have connectivity to it), and at least one interface is available over which you can access this server.

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Note To ensure access to a TFTP server, you will need to configure at least one network interface on your Cisco uBR7200 series. For instructions on using this procedure, refer to the Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide.

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• You know the filename of the image you want to copy onto the Flash memory card.

To copy a bootable file (called new.image in the following examples) onto the Flash memory card:

Router> enable 
Password: <password>
Router# copy tftp:new.image slot0:new.image
20575008 bytes available on device slot0, proceed? [confirm]
address or name of remote host [1.1.1.1]?
loading new.image from 1.1.1.1 (via Ethernet1/0):!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 7799951/15599616 bytes]
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
Router#
Router# configure terminal
Router(config)# no boot system
Router(config)# boot system flash slot0:new.image
Router(config)# ^z
Router# copy running-config startup-config
Router# reload
 

When the system reloads, it will boot the new.image file from the Flash memory card.

Note In the preceding example, the exclamation points (!!!) appear as the file is downloaded, and the "C" characters signify calculation of the checksum, which is a verification that the file has been correctly downloaded to the Flash memory card.

The following scenario describes how to use a newly released image on a Flash memory card in a system that has an older image on a Flash memory card in slot 0 and a default boot image in the onboard Flash memory SIMM.

For this scenario, the filenames are as follows:

• The new image on the new Flash memory card is new.image.

• The old image on the Flash memory card in slot 0 is old.image.

• The bootable image in onboard Flash memory is boot.image.

You will copy the new image from the new Flash memory card onto the Flash memory card that contains the old image.

Note The scenario assumes that the new image will fit on the Flash memory card in slot 0, alongside the old image. If there is not enough available space, use the delete command to delete files from the Flash memory card to make sufficient room for the new image; however, do not delete the image.old file. Then use the squeeze command to remove these deleted files from the Flash memory card. If, after you have deleted files and used the squeeze command, the two files cannot coexist on the Flash memory card in slot 0, remove this card (place it in an antistatic bag and store it in a safe place), then insert the new Flash memory card (with the file new.image) in slot 0. Proceed to Step 5 and use the command boot system flash slot0:new.image to designate the file new.image as the default boot image.

Step 2 Enable the router as follows:

Router> enable
Password: <password>
Router# 
 

Step 3 Insert the new Flash memory card into slot 1.

Router# configure terminal
Router(config)# no boot system
Router(config)# boot system flash slot0:new.image
Router(config)# ^z
Router# copy running-config startup-config
Router# reload
 

When the system reloads, it will boot the file new.image from the Flash memory card in slot 0.