Port Numbering; Leds; Figure 9: Leds For The 40Gbps Qsfp+ Slots; Table 12: Link And Activity Status Leds For The 40Gbps Qsfp+ Transceiver Slots With Qsfp+ Transceivers - Allied Telesis AT-x550-18XTQ Installation Manual

Chapter 1: Overview

Port Numbering

LEDs

38
The QSFP+ slots are numbered 17 and 21 on the front panel. Here are the
guidelines to port numbering:
 A QSFP+ transceiver in slot 17 has the port number 17.
 A QSFP+ transceiver in slot 21 has the port number 21.
 A breakout cable in slot 17 has the port numbers 17, 18, 19, and
20.

A breakout cable in slot 21 has the port numbers 21, 22, 23, and
24.
Each 40Gbps QSFP+ transceiver slot has one LED. The LEDs are located
between the transceiver slots. Refer to Figure 9.
Top Transceiver Slot LED
Figure 9. LEDs for the 40Gbps QSFP+ Slots
The LED displays link and activity status. Refer to Table 12.
Table 12. Link and Activity Status LEDs for the 40Gbps QSFP+
Transceiver Slots with QSFP+ Transceivers
State
Solid Green
Flashing Green
Bottom Transceiver Slot LED
Description
The transceiver has established a 40Gbps
link to a network device.
The transceiver is transmitting or receiving
data.