Cisco Systems Cisco 12416, Cisco 12816

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Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide

OL-11495-01

Chapter 1 Product Overview

Alarm Card, Line Card, and Rout Processor Overview

The transmission speed of the Ethernet port is not user-configurable. You set the

speed through an autosensing scheme on the GRP which is determined by the

network that the Ethernet port is connected to. However, even at an autosensed

data transmission rate of 100 Mbps, the Ethernet port can only provide a usable

bandwidth of substantially less than 100 Mbps. You can expect a maximum usable

bandwidth of approximately 20 Mbps when using either the MII or RJ-45

connection.

The following LEDs on the front panel indicate traffic status and port selection

(Figure 1-15):

• LINK, COLL, TX, RX—Indicate link activity (LINK), collision detection

(COLL), data transmission (TX), and data reception (RX).

Note These LEDs are only used by the RJ-45 Ethernet connector and are

disabled when the MII Ethernet port is in use.

• MII/RJ-45—Indicates which Ethernet port is selected.

Figure 1-15 Port Activity LEDs—Front Panel

H10762

COLL

LINK

RJ-45

MII