Cisco Systems UBR7225VXR specifications Cisco uBR7225VXR Network Interface Overview

Chapter 1 Cisco uBR7225VXR Overview

Cisco uBR7225VXR Network Interface Overview

Figure 1-2 Cisco uBR7225VXR Router—Rear View

1 2 3 4 5

	uBR7225-VXR
uBR7225-VXR	270490

	8	7		6
1	Gigabit Ethernet 0/1		5	Console port
2	Gigabit Ethernet 0/2		6	Auxiliary port
3	Gigabit Ethernet 0/3		7	AC-input power supply 2
4	CompactFlash Disk slot		8	AC-input power supply 1

Cisco uBR7225VXR Network Interface Overview

This section provides a functional overview of the network interfaces available on the

Cisco uBR7225VXR universal broadband router, cable interface line card slot and logical interface numbering, as well as the MAC address assignments for cable interface line card interfaces.

Card Slot and Logical Interface Numbering

In the Cisco uBR7200 series universal broadband routers, the slot number is the chassis slot in which a cable interface card is installed.

Cable interface line card slots maintain the same slot number regardless of whether other cable interface line cards are installed or removed. However, when you move a cable interface line card to a different slot, the logical interface number changes to reflect the new slot number.

The MAC-layer or hardware address is a standardized data-link layer address that is required for certain network interface types. These addresses are specific and unique to each port. The Cisco uBR7225VXR uses a specific method to assign and control the MAC-layer addresses of its port adapters. For a description of the MAC-layer address, refer to the “MAC-Layer Address” section on page 1-5.

The two cable interface line cards in the Cisco uBR7225VXR router provide the connection between the router’s two PCI buses (mb1 and mb2) and external networks. See Figure 1-3.

Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide

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