To resolve the issue, the MPX interface speed for Fortville & Mellanox NICs (10G/40G/50G/100G) is to be set manually if fiber optic media types are used
Perform the following steps to set speed to 100G,
* > set int 100/1 speed 100000
Done
> sh int 100/1
Interface 100/1 (100G Ethernet, CR4, 100 Gbit) #6
flags=0xc020 <ENABLED, UP, UP, autoneg, HAMON, HEARTBEAT, 802.1q>
MTU=9216, native vlan=1, MAC=24:8a:07:5b:14:50, uptime 0h00m16s
Requested: media AUTO, speed 100000, duplex AUTO, fctl OFF,
throughput 0
Actual: media UTP, speed 100000, duplex FULL, fctl OFF, throughput 100000
LLDP Mode: NONE, LR Priority: 1024
RX: Pkts(30612) Bytes(2301661) Errs(0) Drops(24614) Stalls(0)
TX: Pkts(72) Bytes(3024) Errs(0) Drops(0) Stalls(0)
NIC: InDisc(0) OutDisc(0) Fctls(0) Stalls(0) Hangs(0) Muted(0)
Bandwidth thresholds are not set.
Done
Problem Cause
Fiber optic media types may encounter noninteroperable signaling when auto-negotiation is enabled, leading to interfaces remaining down.
The recommendation is to set specific and the same interface speeds at both ends of a connection when using fiber optic media