Specifications

CHAPTER

Overview 1-1

Overview

This chapter provides a physical and functional overview of the PA-12E/2FE port adapter. The

chapter contains the following sections:

• Port Adapter Overview

• 12E/2FE Port Adapter LEDs

• 12E/2FE Port Adapter Receptacles, Cables, and Pinouts

• Ethernet 10BASE-T and Fast Ethernet 100BASE-TX Overview

• IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX Speciﬁcations

Port Adapter Overview

The 12E/2FE port adapter, shown in Figure 1-1, provides Cisco 7200 series routers (including a

Cisco 7206 as a router shelf in a Cisco AS5800 Universal Access Server) and the Cisco uBR7246

with up to twelve 10-Mbps and two 10/100-Mbps switched Ethernet (10BASE-T) and Fast Ethernet

(100BASE-TX) interfaces for an aggregate bandwidth of 435 Mbps, full-duplex.

Figure 1-1 12E/2FE Port Adapter, Faceplate View

Note The 12E/2FE port adapter is a dual-width port adapter, which means it occupies two

horizontally aligned port adapter slots when installed in a Cisco 7200 series router or

Cisco uBR7246. (Single-width port adapters occupy individual port adapter slots in a Cisco 7200

series router or Cisco uBR7246.)

The 12E/2FE port adapter has two handles, but the handles are not shown in Figure 1-1 to allow a

full view of the port adapter faceplate.

The 12E/2FE port adapter off-loads Layer 2 switching from the host CPU by using

store-and-forward or cut-through packet switching technology between interfaces within the same

virtual LAN (VLAN) on the 12E/2FE port adapter. The 12E/2FE port adapter supports up to four

VLANs (referred to in this document as bridge groups).

H10302

ETHER SWITCH

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