Cisco XR 12410 - Manual (Page 148)

Chapter 4 Troubleshooting the Installation
Troubleshooting the Processor Subsystem
4-18
Cisco XR 12410 and Cisco XR 12810 Router Installation Guide
OL-17441-01
PRP Ethernet Ports and Status LEDs
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 4-5 ):
• 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).
Note Because both ports are supported on the PRP, ETH 0 is always on. ETH 1
lights when it is selected.
Figure 4-5 Port Activity LEDs—Partial Front Panel
LINK Indicates link activity
EN Indicates the port is enabled
TX Indicates data transmission
RX Indicates data reception
RX
TX
PRIMARY
SLO
T-
1
SLO
T-0
LINK
EN
RX
TX
ETH 1 ETH 0
LINK PRIMARY
EN
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