Cisco XR 12406 Installation Manual page 27

Chapter 1 Cisco XR 12406 Router Overview
Note
PRP Ethernet Ports and Status LEDs
OL-13831-01
Status LEDs (Slot-0 / Slot-1) indicate when the flash memory card in that slot is
accessed (see Figure 1-4). Each slot has an eject button (located behind the cover)
to remove a flash card from the slot.
PRP-3 does not have PCMCIA slots (slot 0 and slot 1). PRP-3 has an external
CompactFlash (disk0:) that replaces the PCMCIA slots.
The PRP has two 8-pin media-dependent interface (MDI) RJ-45 ports for either
IEEE 802.3 10BASE-T (10 Mbps) or IEEE 802.3u 100BASE-TX (100 Mbps)
Ethernet connections. These ports are labeled ETH 0 and ETH 1.
The transmission speed of the Ethernet port is not user-configurable. You set the
speed through an autosensing scheme on the PRP 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 an Ethernet connection.
The following LEDs on the front panel indicate traffic status and port selection
(Figure 1-6):
LINK, EN, TX, RX—Indicate link activity (LINK), port enabled (EN), data
•
transmission (TX), and data reception (RX).
PRIMARY—Indicates which Ethernet port is selected (ETH 0 or ETH 1).
•
Because both ports are supported on the PRP, ETH 0 is always on. ETH 1
Note
lights when it is selected.
Physical and Functional Description
Cisco XR 12406 Router Installation Guide
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