I have an CCR-2216 → Arista 100g link that was working. Noticed it stopped working, so we swapped out the QSFP28-SR4-100G modules and it still doesn’t work! Just ordered a new MPO cable, but the light levels look fine for all 4 lanes.
Messed with all the negotiation/FEC/speed settings I could, and it isn’t coming up. Even upgraded to 7.12.1 from 7.8. Can someone sanity check my settings?
set [ find default-name=qsfp28-1-1 ] auto-negotiation=no comment="why not working" fec-mode=fec91 l2mtu=9570 mtu=9000 name=\
"qsfp28-1-1 - arista et54/1 - 100Gb" sfp-shutdown-temperature=70C speed=100G-baseSR4-LR4
set [ find default-name=qsfp28-1-2 ] auto-negotiation=no fec-mode=fec91 l2mtu=9570 mtu=9000 speed=100G-baseSR4-LR4
set [ find default-name=qsfp28-1-3 ] auto-negotiation=no fec-mode=fec91 l2mtu=9570 mtu=9000 speed=100G-baseSR4-LR4
set [ find default-name=qsfp28-1-4 ] auto-negotiation=no fec-mode=fec91 l2mtu=9570 mtu=9000 speed=100G-baseSR4-LR4
And on the Arista:
interface Ethernet54/1
description Core: Hormiga qsf28-1-1 (CCR2216) [100Gb]
load-interval 30
mtu 9000
speed forced 100gfull
error-correction encoding reed-solomon
no switchport
ip address 10.1.128.145/30
#show interfaces ethernet 54/1,54/2,54/3,54/4 transceiver
If device is externally calibrated, only calibrated values are printed.
N/A: not applicable, Tx: transmit, Rx: receive.
mA: milliamperes, dBm: decibels (milliwatts).
Bias Optical Optical
Temp Voltage Current Tx Power Rx Power
Port (Celsius) (Volts) (mA) (dBm) (dBm) Last Update
----- --------- -------- -------- -------- -------- -------------------
Et54/1 33.45 3.30 6.99 0.29 -5.92 0:00:04 ago
Et54/2 33.45 3.30 7.01 -0.01 -0.05 0:00:04 ago
Et54/3 33.45 3.30 7.01 0.08 -3.45 0:00:04 ago
Et54/4 33.45 3.30 7.00 -0.08 0.07 0:00:04 ago
(I did mess with setting the ports to 4x 25G and some of the Lanes started flapping up/down, but it didn’t make sense.)