QFX5220-128C Port Panel

Overview

The port panel of the QFX5220-128C consists of 128 high-density 100-Gigabit Ethernet quad small form-factor pluggable solution (QSFP28) ports and the management panel. The highly flexible ports support 100-Gbps or 40-Gbps port speeds; 100-Gbps speed is the default, 40G-Gbps must be configured. The QFX5220-128C supports channelizing the QSFP28 ports to 4 independent 25-Gbps speed interfaces. The switch has two dedicated 10-Gigabit Ethernet ports and when the 128 ports are configured for 40-Gbps speeds, 32 of the 128 ports can be channelized to 4 x 25-Gbps. See Figure 1.

Figure 1: QFX5220-128C Port Panel

1 — 128 QSFP28 ports	7 — USB 2.0 port
2 — RJ-45 time-of-day message port	8 — Reset button
3 — PTP-capable connections: SMB In, SMB Out, 10 MHz In, 10 MHz Out	9 — ESD point
4 — Chassis status alarms	10 — RJ-45 MGMT connection for the re0:mgmt-0 management interface
5 — 2 SFP+ ports	11 — Chassis serial number pull-out tab
6 — RJ-45 console port (CON) to support RS-232 serial ports. (The LEDs indicate status and link.)

Network Ports

The QFX5220-128C QSFP28 network ports (0 to 127) support:

• 100-Gbps QSFP28 transceivers

• 100-Gbps QSFP28 direct attach copper (DAC) cables

• 100-Gbps QSFP28 to 25-Gbps SFP28 direct attach copper break out (DACBO) cables (100-Gbps breaks out to 4 independent 25-Gbps ports)

• 100-Gbps active optic cables (AOC)

• 40-Gbps QSFP+ transceivers

• 40-Gbps AOC

• 40 Gbps QSFP+ DAC cables

• 40 Gbps QSFP+ transceivers

• 40 Gbps QSFP+ to 10 Gbps SFP+ DACBO cables (40 Gbps breaks out to 10 Gbps ports)

The 10-Gbps network ports 128 (et-0/0/128) and 129 (et-0/0/129) support SFP+ transceivers.

Port Configurations

The QFX5220-128C has 128 QSFP28 ports and 2 SFP+ ports. You can configure any of these ports in these combinations:

• Any of the QSFP28 ports can be configured as 100 Gbps.

• Any even-numbered QSFP28 port can be configured as 40 Gbps. The system will configure the next (odd) port as unused.

• Every fourth port (0, 4, 8...124) can be configured as channelized 4 x 25 Gbps. However before configuring a port as channelized, the next three ports must be configured as unused.

• Any SFP+ port can be configured as 10 Gbps or 1 Gbps.

Table 1 shows how each QSFP28 port can be configured. You can mix and match speeds as long as you adhere to the port rules. For example, on the same device you can configure port 0 as 40 Gbps, ports 2 and 3 as 100 Gbps, and port port as 4 x 25 Gbps. In this example, port 1 and port 5-7 must be configured as unused.

100-Gbps Port Configuration

All QSFP28 ports work by default as 100 Gbps. The ports are autosensing; if a 100 Gbps transceiver is inserted, no configuration is required.

40-Gbps Port Configuration

1. Block the port following the desired 40-Gbps port as unused and commit the configuration. For example, because you are configuring et-0/0/0 as 40 Gbps, you must first configure the following port (et-0/0/1) as unused and commit that configuration.
   # set chassis fpc 0 pic 0 port 1 unused

   # commit
2. Configure the speed on the desired port (et-0/0/0) as 40 Gbps and commit the configuration.
   # set chassis fpc 0 pic 0 port 0 speed 40g

   # commit

4 x 25 Gbps Port Channelization

1. Block the three ports following the desired channelized port as unused, and commit the configuration. For example, because you are configuring et-0/0/4 as 4 x 25 Gbps, you must first configure the following ports (et-0/0/5, et-0/0/6, and et-0/0/7) as unused and commit the configuration.
   # set chassis fpc 0 pic 0 port 5 unused

   # set chassis fpc 0 pic 0 port 6 unused

   # set chassis fpc 0 pic 0 port 7 unused

   # commit

   Software removes these ports and updates the configuration.

2. Configure the speed on the desired port (et-0/0/4) as 25 Gbps, the number -of sub-ports as 4, and commit the configuration:
   # set chassis fpc 0 pic 0 port 4 speed 25g number-of-sub-ports 4

   # commit

Delete 4 x 25 Gbps or 4 x 10 Gbps Port Channelization

To remove the channelization configuration from a set of QFX5220-128C ports, delete the configuration from the channelized port and commit the configuration. For example:

QFX5220-128C Network LEDs

The QSFP28 network ports use a single bi-colored LED for each port or channel to indicate link status, activity on the link, or a fault condition. When the port is channelized, there is an LED for each channel; when the port is not channelized, the left-most LED indicates the port link status.

The 10-Gbps SFP+ ports have separate bi-colored LEDs; the left LED indicates link and activity and the right LED indicates a fault condition. See Figure 2.

Figure 2: Link/Activity and Status LEDs on QFX5220-128C

1 — QSFP28 LEDs that indicate link/activity,status, and channelization

2 — SFP+ :LEDs that indicate link/activity and status

Table 2 describe the various states of the LEDs for the QSFP28 ports and Table 3 describe the LED states for the SFP+ ports.