Specifications

Configuring and Managing Cisco Access Servers and Dial Shelves
Port Management Services on Cisco Access Servers
DC-124
Cisco IOS Dial Technologies Configuration Guide
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 1 Run the show dsip transport command.
Step 2 Check the “DSIP registered addresses” column. If there are zero entries there, 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.
Port Management Services on Cisco Access Servers
Port Management Services on the Cisco AS5400 Access Server
Port service management on the Cisco AS5400 access server implements service using the NextPort dial
feature card (DFC). The NextPort DFC is a hardware card that processes digital service port technology
for the Cisco AS5400 access server. A port is defined as an endpoint on a DFC card through which
multiservice tones and data flow. The ports on the NextPort DFC support both modem and digital
services. Ports can be addressed-aggregated at the slot level of the NextPort module, the Service
Processing Element (SPE) level within the NextPort module, and the individual port level.
Cisco IOS Release 12.1(3)T or higher is required for the NextPort DFC.
Instead of the traditional line-modem one-to-one correspondence, lines are mapped to an SPE that
resides on the Cisco AS5400 NextPort DFC. Each SPE provides modem services for six ports. Busyout
and shutdown can be configured at the SPE or port level. The NextPort DFC introduces the slot and SPE
software hierarchy. On the Cisco AS5400, the hierarchy designation is slot/SPE.
The NextPort DFC slot is defined as a value between 1 and 7. Slot 0 is reserved for the motherboard.
Each NextPort DFC provides 18 SPEs. The SPE value ranges from 0 to 17. Since each SPE has six ports,
the NextPort DFC has a total of 108 ports. The port value ranges from 0 to 107.
Router# show dsip transport
Displays information about the DSIP transport statistics for the
control/data and IPC packets and registered addresses.
Router# show dsip version
Displays DSIP version information.
Command Purpose