Functional Overview; Port Densities; Port Addresses - Cisco 7000 Hardware Installation And Maintenance

Functional Overview

Functional Overview
This section describes functions that support the router's high availability and maintainability. OIR
for interface processors and redundant hot-swap for power supplies enable you to quickly install new
equipment without interrupting system power or shutting down interfaces. The environmental
monitoring and reporting functions continuously monitor temperature and voltage points in the
system, and provide reports and warning messages that enable you to quickly locate and resolve
problems and maintain uninterrupted operation. The redundant power option provides dual
load-sharing power supplies. In the event of a power-supply failure, or if one of two separate power
sources fails, the redundant power option assures uninterrupted operation.

Port Densities

The five available interface slots support any combination of network interface processors, or any
five of the same type for the following maximum port densities:
•
•
•
•
•
•
•
•
•
You can install any combination of interface processors in any of the five available interface
processor slots. There are no restrictions on either the number of interface processors that can be
installed or their proximity to the processor.

Port Addresses

Each interface (port) in the router is designated by several different types of addresses. The physical
port address is the actual physical location (slot/port) of the interface connector within the chassis.
The system software uses the physical addresses to control activity within the router and to display
status information. These physical slot/port addresses are not used by other devices in the network;
they are specific to the individual router and its internal components and software.
The system software also assigns a logical interface address to each interface, which is included in
some of the status displays. The logical address is used in our other modular platforms (A-type, M,
and C chassis) and is present in all router software, but it is not implemented (or needed) in the
Cisco 7000.
A third type of address is the MAC-layer or hardware address, which is a standardized data link layer
address that is required for every port or device that connects to a network. Other devices in the
network use these addresses to locate specific ports in the network and to create and update routing
tables and data structures. The Cisco 7000 uses a unique method to assign and control the
MAC-layer addresses of its interfaces.
The following sections describe how the Cisco 7000 assigns and controls both the physical
(slot/port) and MAC-layer addresses for interfaces within the chassis.
1-54 Cisco 7000 Hardware Installation and Maintenance
Up to 5 ATM ports
Up to 8 channel attachments
Up to 30 Ethernet ports
Up to 22 Fast Ethernet ports (one or two interfaces per FEIP)
Up to 20 Token Ring ports
Up to 5 FDDI ports
Up to 40 serial ports
Up to 5 HSSI ports
Up to 240 multichannel serial interfaces