Features of 400ZR and 400G OpenZR+
Application Selection
The 400ZRand 400G OpenZR+ optics advertises supported applications for a particular speed. You can select any of the application based on your requirement. You can also switch between these applications. See Table 1 for devices that support application selection.
Application |
Host ID |
Host Interface Code Description |
Media ID |
Media Interface Code Description |
Channelization |
|---|---|---|---|---|---|
1 |
17 |
400GAUI-8 C2M (Annex 120E) |
62 |
400ZR, DWDM, amplified |
1x400G CFEC mplified |
2 |
17 |
400GAUI-8 C2M (Annex 120E) |
63 |
400ZR, single wavelength unamplified |
1x400G CFEC unamplified |
3 |
13 |
100GAUI-2 C2M (Annex 135G) |
62 |
400ZR, DWDM, amplified |
4x100G CFEC amplified |
Application |
Host ID |
Host Interface Code Description |
Media ID |
Media Interface Code Description |
Channelization |
|---|---|---|---|---|---|
1 |
17 |
400GAUI-8 C2M (Annex 120E) |
62 |
400ZR, DWDM, amplified |
1x400G CFEC amplified |
2 |
17 |
400GAUI-8 C2M (Annex 120E) |
63 |
400ZR, Single Wavelength, unamplified |
1x400G CFEC unamplified |
3 |
13 |
100GAUI-2 C2M (Annex 135G) |
62 |
400ZR, DWDM, amplified |
4x100G CFEC amplified |
4 |
17 |
400GAUI-8 C2M (Annex 120E) |
70 |
ZR-400-OFEC-16QAM |
1x400G OFEC |
5 |
13 |
100GAUI-2 C2M (Annex 135G) |
70 |
ZR-400-OFEC-16QAM |
4x100G OFEC |
6 |
13 |
100GAUI-2 C2M (Annex 135G) |
71 |
ZR-300-OFEC-8QAM |
3x100G OFEC |
7 |
13 |
100GAUI-2 C2M (Annex 135G) |
72 |
ZR-200-OFEC-QPSK |
2x100G OFEC |
8 |
13 |
100GAUI-2 C2M (Annex 135G) |
73 |
ZR-100-OFEC-QPSK |
1x100G OFEC |
| Optics | Speed |
Default Application |
|---|---|---|
| 400GbE ZR | 1x400G |
CFEC amplified |
| 400GbE ZR+ | OFEC |
For example:
To switch from 1x400G OFEC to 4x100G CFEC in ZR+
Change the speed from 1x400 Gbps to 4x100 Gbps using the
set interface et-<> number-of-sub-ports <> speed <>:set interface et-<> number-of-sub-ports 4 speed 100g
The command changes the speed from 1x400 Gbps to 4x100 Gbps.
Switch the application from OFEC to CFEC using the
set interfaces <interface> optics-options application hostid <hostid> mediaid <mediaid> [domainid <domainid>]command:set interface et-<>:0 optics-options application mediaid 62 hostid 13
The command switches the application to 4x100 Gbps CFEC.
To display the configurable applications
Use the
show interfaces diagnostics optics-applications <interface>command to display the configurable applications. For example, 1x400G supports the applications as highlighted in the following output.router> show interfaces diagnostics optics-applications et-0/0/10 Physical interface: et-0/0/10 Interface Name : et-0/0/10 Current Speed : 1x400G Ap Sel Host Intf Code Media Intf Code Host Lanes Media Lanes Host Assign Media Assign 1 400GAUI-8 C2M (Annex 120E)(17) 400ZR, DWDM, amplified(62) 8 1 1 1 2 400GAUI-8 C2M (Annex 120E)(17) 400ZR, Single Wavelength,Unamplified(63) 8 1 1 1 3 100GAUI-2 C2M (Annex 135G)(13) 400ZR, DWDM, amplified(62) 2 1 85 1
Configure Application Selection
Target Output Power
You can view the minimum and maximum configurable transmit output power for 400ZR and 400G OpenZR+ optics modules. If you want to configure a transmit output power other than the default power, use the set interfaces et-<> optics-options tx-power <> command.
The minimum and maximum transmit output power varies:
Based on the optical transeivers.
Based on the transceiver vendor.
Optical Transceiver |
JPN |
Maximum Tx Power |
Minimum Tx Power |
|---|---|---|---|
QDD-400G-ZR |
740-114884 |
4 dBm |
-22 dBm |
QDD-400G-ZR-M |
740-131169 |
-10 dBm |
-14 dBm |
QDD-400G-ZR-M-HP |
740-131168 |
1 dBm |
-6 dBm |
JCO400-QDD-ZR |
740-157132 |
-10 dBm |
-14 dBm |
JCO400-QDD-ZR-M |
740-157138 |
-10 dBm |
-14 dBm |
JCO400-QDD-ZR-M-HP |
740-151745 |
1 dBm |
-6 dBm |
Changing or adjusting to a different Tx power improves transmission quality. See tx-power.
| Transceiver | Default Transmit Power |
|---|---|
| QDD-400G-ZR | -10 dBm |
| JCO400-QDD-ZR | -10 dBm |
| QDD-400G-ZR-M | -10 dBm |
| JCO400-QDD-ZR-M | -10 dBm |
| QDD-400G-ZR-M-HP | 0 dBm |
Configure Target Output Power
Enhanced Loopback Options
Only the Media Side Output loopback type was available before Junos OS Evolved 23.1 R1.
From Junos OS Evolved 23.1 R1 onwards, the following types of loopbacks are available in addition to Media Side Output:
Media Side Input—Loopback of the transceiver optical input signal back to its input
Host Side Input—Loopback of the data packet signal output at the host side back to its input
Host Side Output—Loopback of the data packet signal input at the host side back to its input
The enhanced command to configure lo0 is set interface et-<> optics-options loopback loopbacktype <loopbacktype>.
For example:
set interface et-<> optics-options loopback loopbacktype <media-side-out>
set interface et-<> optics-options loopback loopbacktype <media-side-in>
set interface et-<> optics-options loopback loopbacktype <host-side-out>
set interface et-<> optics-options loopback loopbacktype <host-side-in>
This enhancement is supported on PTX10001-36MR. See optics-options.
Tunable Wavelength
The 400ZR and 400G OpenZR+ are DWDM tunable transceivers. You can configure the transceivers with Optical Internetworking Forum (OIF) channels.
Both 400ZR and 400G OpenZR+ optic modules support flex grid channel spacing in increments of 6.25 GHz. The 400ZR and 400G OpenZR+ support 75 GHz/100 GHz frequency spacing. A 75 GHz channel spacing is more suitable for point-to-point links, while a 100 GHz channel spacing is more applicable to ROADM networks.
The show optics diagnostics command displays the tunable parameters like Thermoelectric Cooler (TEC) fault, wavelength unlocked fault status, wavelength/frequency, channel number, and so on.
Use the set interface et-<> optics-options wavelength command to configure wavelength. By default, the wavelength is 1550.12 nm, which corresponds to 193.40 THz. See wavelength.
Signal Power Performance
From 23.4R1 Junos OS Evolved onwards, the show interface diagnostics optics et-<x/x/x> command shows the Rx signal power in the mW/dBm format. This enhancement is applicable to all devices on Junos OS Evolved platforms.
Example:
root@ardbeg-q> show interfaces diagnostics optics et-0/0/0
Physical interface: et-0/0/0
Module temperature : 55 degrees C / 131 degrees F
Module voltage : 3.252 V
Wavelength channel number : 28
Wavelength setpoint : 1550.12 nm
Tx dither : Disabled
Frequency error : 0.00 GHz
Wavelength error : 0 nm
TEC fault alarm : False
Wavelength unlocked alarm : False
Tx tune alarm : False
Module temperature high alarm : Off
Module temperature low alarm : Off
Module temperature high warning : Off
Module temperature low warning : Off
Module voltage high alarm : Off
Module voltage low alarm : Off
Module voltage high warning : Off
Module voltage low warning : Off
Module temperature high alarm threshold : 76 degrees C / 168 degrees F
Module temperature low alarm threshold : -6 degrees C / 21 degrees F
Module temperature high warning threshold : 73 degrees C / 163 degrees F
Module temperature low warning threshold : -3 degrees C / 26 degrees F
Module voltage high alarm threshold : 3.7 V
Module voltage low alarm threshold : 3 V
Module voltage high warning threshold : 3.599 V
Module voltage low warning threshold : 3.049 V
Laser bias current high alarm threshold : 120 mA
Laser bias current low alarm threshold : 80 mA
Laser bias current high warning threshold : 110 mA
Laser bias current low warning threshold : 90 mA
Laser output power high alarm threshold : 2.511 mW / 4.00 dBm
Laser output power low alarm threshold : 0.125 mW / -8.99 dBm
Laser output power high warning threshold : 1.995 mW / 3.00 dBm
Laser output power low warning threshold : 0.158 mW / -7.99 dBm
Laser rx power high alarm threshold : 2.511 mW / 4.00 dBm
Laser rx power low alarm threshold : 0.006 mW / -22.00 dBm
Laser rx power high warning threshold : 1.995 mW / 3.00 dBm
Laser rx power low warning threshold : 0.012 mW / -18.99 dBm
Laser temperature high alarm threshold : 65 degrees C / 149 degrees F
Laser temperature low alarm threshold : 25 degrees C / 77 degrees F
Laser temperature high warning threshold : 55 degrees C / 131 degrees F
Laser temperature low warning threshold : 35 degrees C / 95 degrees F
Lane 0
Laser bias current : 100 mA
Laser output power : 1.004 mW / 0.01 dBm
Laser temperature : 48 degrees C / 118 degrees F
Laser receiver power : 0.887 mW / -0.51 dBm
Rx power (signal) : 0.00 mW / -44.00 dBm <-------
Lane chromatic dispersion : 0.0 ps/nm
Lane differential group delay : 0.0 ps
Lane carrier frequency offset : 0.0 MHz
Lane polarization dependent loss : 0.0 dB
Lane snr : 0.0 dB
Lane Optical signal-to-noise ratio : 0.0 dB
Lane sopmd : 0.0
Laser bias current high alarm : Off
Laser bias current low alarm : Off
Laser bias current high warning : Off
Laser bias current low warning : Off
Laser temperature high alarm : Off
Laser temperature low alarm : Off
Laser temperature high warning : Off
Laser temperature low warning : Off
Laser receiver power high alarm : Off
Laser receiver power low alarm : Off
Laser receiver power high warning : Off
Laser receiver power low warning : Off
Laser output power high alarm : Off
Laser output power low alarm : Off
Laser output power high warning : Off
Laser output power low warning : Off
Tx loss of signal functionality alarm : Off
Rx loss of signal alarm : Off
Tx laser disabled alarm : OffPorts in High-Power Mode
The number of ports supporting the 400G-ZR optics is restricted based on the power consumption on the QFX5220-32CD and QFX5130-32CD devices. For better thermal handling, 16 ports out of 32 QSFP56-DD ports (0, 3, 4, 7, 8, 11, 12, 15, 16, 19, 20, 23, 24, 27, 28, 31) support the 400G-ZR optics.
The below table includes the corresponding ports that are configured as “unused”.
| Ports Supporting 400G-ZR Optics | Corresponding Ports to Be Configured to Unused |
|---|---|
| 0 | 1 |
| 3 | 2 |
| 4 | 5 |
| 7 | 6 |
| 8 | 9 |
| 11 | 10 |
| 12 | 13 |
| 15 | 14 |
| 16 | 17 |
| 19 | 18 |
| 20 | 21 |
| 23 | 22 |
| 24 | 25 |
| 27 | 26 |
| 28 | 29 |
| 31 | 30 |
See Configure High Power Mode to configure the ports in the high-power mode.