S

System controller Cisco shelf SC3640

Router shelf shelf ID=0 Cisco 7206

DSI port adapter 0/2/0

Network element management server (SNMP)

AAA server

AAA server

DSI port adapter 0/2/0

Client Client PC modem

Dial shelf interconnect cable

Client Client PC modem

Dial shelf interconnect cable

Note The Cisco IOS uses a three-element notation to specify some interface and port locations: shelf slot/port.

| Section 3 Commissioning the Cisco AS5800 Hardware_

Understanding the Basic Hardware Architecture I

• The Cisco 7206 router shelf contains:

- Port adapters. In this case study, the Cisco 7206 uses Fast Ethernet (FE) 0/1/0 to connect to the IP backbone.

- Service adapters (for example, compression and encryption).

- A dial shelf interconnect (DSI) port adapter. In this case study, the adapter is located at 0/2/0.

The Cisco 7206 communicates to the Cisco DS5814 dial shelf through an external dial shelf interconnect cable. The cable connects from the DSI port adapter to the dial shelf controller (DSC) card.

The Cisco 7206 communicates with the Cisco DS5814 using the Dial Shelf Interconnect Protocol (DSIP).

• The Cisco DS5814 dial shelf contains:

- Dial shelf controller (DSC) cards. They fit in slots 12 or 13 only. If you have only one DSC card, slot 12 is recommended. One DSC card is used in this case study.

The DSC card contains its own Cisco IOS image. The card can be accessed through its console port and Ethernet interface for maintenance purposes only. No IP packets originating from any trunk or modem card go out this Ethernet interface. The Ethernet exit-aggregation point is on the router shelf.

- T3/T1/E1 cards (connect to the PSTN). They fit in slots 0 through 5 only. Slots 0 and 1 are recommended. In this case study, a T3 trunk card is located at 1/0/0.

- Modem/voice cards. They fit in slots 0 through 11. In this case study, 9 modem cards are installed. The first modem card is in slot 2. The line-modem range is 1/2/00 to 1/10/143.

• The Cisco 3640 system controller is an external management subsystem. It interfaces with the Cisco 7206 and provides the following functions:

- SNMP and syslog off-loading

- Out-of-band console access

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