This article explains about the 100m support on ACX7020
You wouldn’t see any option to configure 100m on interface
user@lab-ACX7020-20# set interfaces et-0/0/4 speed ?
Jun 29 13:25:24
Possible completions:
10g
1g
25g
auto Enable auto negotiation of interface speed
user@ACX7020> show version node all
re0:
--------------------------------------------------------------------------
Hostname:ACX7020
Model: ACX7020_AC
Junos: 25.4R1-S1.3-EVO
Yocto: 4.0.22
Linux Kernel: 5.15.164-10.22.33.18-yocto-standard-juniper-17155-g5adff1d6d404
JUNOS-EVO OS 64-bit [junos-evo-install-acx-f-x86-64-25.4R1-S1.3-EVO]
On ACX7020 platforms, when there is the requirement for having 100 Mbps CLI (also known as Antman NPI) connection for management, this is not supported for a specific Junos version
The hardware does not support operation of the management interface at a fixed 100 Mbps speed for this use case.
The issue has been fixed under PR1959044
Fix is available in below versions
user@ACX7020> show version
Hostname: ACX7020
Model: ACX7020_DC
Junos: 26.4-xxx-EVO
Yocto: 4.0.35
Linux Kernel: 5.15.206-10.22.33.24-yocto-standard-juniper-28254-g073a667508ea
JUNOS-EVO OS 64-bit [junos-evo-install-acx-f-x86-64-26.4-202607141627.0-EVO]
user@ACX7020>
user@ACX7020> configure
Entering configuration mode
[edit]
user@ACX7020# set interfaces et-0/0/4 speed 100m
user@ACX7020# set interfaces et-0/0/4 speed ?
100m. >>>>>Now 100m is available
user@ACX7020#
user@ACX7020# show | compare
+ interfaces {
+ et-0/0/4 {
+ speed 100m;
+ }
user@ACX7020# commit check
configuration check succeeds
user@ACX7020# commit
commit complete
user@ACX7020# show interfaces et-0/0/4
speed 100m;