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This chapter discusses configuration and monitoring tasks for dial shelves and dial shelf controllers, particularly on Cisco AS5800 Universal Access Servers.
For more information on the Cisco AS5800, go to the Cisco Connection Documentation site on Cisco Connection Online (CCO), or use the Cisco Documentation CD-ROM, and follow this path:
Cisco Product Documentation: Access Servers and Access Routers: Access Servers: Cisco AS5800
For additional information about the technologies in this chapter, see the following publications:
For a complete description of dial shelf management commands in this chapter, refer to the "Dial Shelf Management Commands" chapter in the "Cisco IOS System Management Commands" part of the Release 12.1 Cisco IOS Configuration Fundamentals Configuration Command Reference. To locate documentation of other commands that appear in this chapter, use the command reference master index or search online.
Perform the tasks found in the following sections to manage dial shelves:
The Cisco AS5800 is a rack-mounted system consisting of a router shelf and a dial shelf. The dial shelf contains trunk cards, modem cards, and dial shelf controller (DSC) cards. The trunk cards and modem cards are referred to collectively as feature boards. Slots 0 through 11 of the dial shelf are reserved for feature boards, while slots 12 and 13 are reserved for the DSC cards. The AS5800 series supports the use of a single router shelf or two router shelves (split-shelf configuration), and the use of a single DSC or two DSCs (DSC redundancy) for backup purposes.
Dial Shelf Interconnect Protocol (DSIP) is used for communication between router shelf and dial shelf on an AS5800. Figure 33 diagrams the components of the architecture. DSIP communicates over the packet backplane via the dial shelf interconnect (DSI) cable.
Perform the tasks described in the following sections to perform the respective configuration tasks:
Normally you do not need to change the shelf IDs; however, if you do, we recommend that you change the shelf number when you initially access the setup facility. For information on the setup facility, refer to the Cisco AS5800 Universal Access Server Software Installation and Configuration Guide.
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Caution You must reload the Cisco AS5800 for the new shelf number to take effect. Because the shelf number is part of the interface names when you reload, all NVRAM interface configuration information is lost. |
If you are booting the router shelf from the network (netbooting), you can change the shelf numbers using the shelf-id command. Perform the following tasks beginning in EXEC mode:
If you are booting the router shelf from Flash memory, perform the following tasks beginning in EXEC mode:
It is possible to connect directly to the system console interface on the DSC to execute dial shelf configuration commands, but this is not recommended. All commands necessary for dial shelf configuration, including show and debug tasks, can be executed remotely through the router console. A special command called execute-on is provided for this purpose. This command enables a special set of Exec mode commands to be executed on the router or the dial shelf. This command is a convenience that avoids connecting the console to the DSC. For a list of commands you can execute using execute-on, see the complete command description in the Release 12.1 Cisco IOS Configuration Fundamentals Command Reference.
To enter a command that you wish to execute on a specific card installed in the dial shelf while logged onto the router shelf console, use the following privileged EXEC mode commands:
| Command | Purpose |
|---|---|
execute-on slot slot command | Executes a command from the router shelf on a specific card in the dial shelf. |
execute-on all command | Executes a command from the router shelf on all cards in the dial shelf. |
The DSC card provides the following:
The TDM bus in the backplane on the dial shelf must be synchronized to the T1/E1 clocks on the trunk cards. The Dial Shelf Controller (DSC) card on the dail shelf provides hardware logic to accept multiple clock sources as input and use one of them as the primary source to generate a stable, PPL synchronized output clock. The input clock can be any of the following sources:
For dual (redundant) DSC cards, the external DSC clocking port should be configured so that the clock signal fed into both DSCs is identical.
To configure the clock source and priority of the clock source used by the TDM bus, perform one or more of the following tasks, beginning in global configuration mode:
| Command | Purpose | |
|---|---|---|
Step 1 | dial-tdm-clock priority number trunk-slot slot port number | Configure the priority of the trunk card clock. |
Step 2 | dial-tdm-clock priority number freerun | Configure the priority of the free running clock. |
Step 3 | dial-tdm-clock priority number external {e1 | t1}
[120ohm]
| Configure the priority of the T1 or E1 external clock. |
Step 4 | exit | Exit configuration mode. |
Step 5 | copy running-config startup-config | Save your configuration. |
Step 6 | show dial-shelf clocks | Verify the clocking priorities. |
Use the following commands in privileged EXEC mode to swap dial shelf cards or to troubleshoot the dial shelf cards from the router shelf:
| Command | Purpose |
|---|---|
hw-module slot shelf-id/slot-number
{start | stop}
| Stops a DSC remotely from the router console or restarts the DSC if it has been stopped. |
hw-module slot shelf-id/slot-number reload | Reloads the specified feature board. This command can be used instead of a manual online insertion and removal (OIR) to reload and powercycle a feature board. Note that this command cannot be applied to DSCs. |
show redundancy [history] | Displays the current or history status for redundant DSC. |
debug redundancy {all | ui | clk | hub}
| Use this debug command if you need to collect events for troubleshooting, selecting the appropriate required key word. |
show debugging | Lists the debug commands that are turned on, including that for redundant DSC. |
There are a number of show commands available to aid in troubleshooting Dial Shelves. Use any of the following EXEC mode commands to monitor DSI and DSIP activity:
| Command | Purpose |
|---|---|
clear dsip tracing | Used to clear tracing statistics for the Distributed System Interconnect Protocol (DSIP). |
show dsip | Displays all information about the Distributed System Interconnect Protocol (DSIP). |
show dsip clients | Displays information about Distributed System Interconnect Protocol (DSIP) clients. |
show dsip nodes | Displays information about the processors running the Distributed System Interconnect Protocol (DSIP). |
show dsip ports | Displays information about local and remote ports. |
show dsip queue | Displays the number of messages in the retransmit queue waiting for acknowledgment. |
show dsip tracing | Displays Distributed System Interconnect Protocol (DSIP) tracing buffer information. |
show dsip transport | Displays information about the Distributed System Interconnect Protocol (DSIP) transport statistics for the control/data and IPC packets and registered addresses. |
show dsip version | Displays Distributed System Interconnect Protocol (DSIP) version information. |
The privileged EXEC mode show dsi command can also be used to troubleshoot, as it displays the status of the DSI adapter, which is used to physically connect the router shelf and the dial shelf to enable DSIP communications.
The following is an example troubleshooting scenario:
Problem: The router shelf boots, but there is no communication between the router and dial shelves.
Step 2 Check the "DSIP registered addresses" column. If there are zero entries here, there is some problem with the Dial Shelf Interconnect (DSI). Check if the DSI is installed in the router shelf.
Step 3 If there is only one entry and it is our own local address, then first sanity check the physical layer. Make sure that there is a physical connection between the RS and DS. If everything is fine from cabling point of view, go to step 3.
Step 4 Check the DSI health by issuing the show dsi command. This gives a consolidated output of DSI controller and interface. Check for any errors like runts, giants, throttles and other usual FE interface errors.
Diagnosis: If an entry for a particular dial shelf slot is not found among the registered addresses, but most of other card entries are present, the problem is most likely with that dial shelf slot. The DSI hardware on that feature board is probably bad.
Posted: Fri Sep 8 18:53:08 PDT 2000
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