3850 Flexlink Option not Available

[avilt]

I have procured a new Cisco 3850 switch with IOS as shown below and I need to enable flexlink but that option is not available in this switch. Please advise.

Cisco IOS Software [Denali], Catalyst L3 Switch Software (CAT3K_CAA-UNIVERSALK9-M), Version 16.3.7, RELEASE SOFTWARE (fc4)

MY-SW(config-if)#switchport ?
access Set access mode characteristics of the interface
autostate Include or exclude this port from vlan link up calculation
block Disable forwarding of unknown uni/multi cast addresses
host Set port host
mode Set trunking mode of the interface
nonegotiate Device will not engage in negotiation protocol on this
interface
port-security Security related command
priority Set appliance 802.1p priority
private-vlan Set the private VLAN configuration
protected Configure an interface to be a protected port
trunk Set trunking characteristics of the interface
voice Voice appliance attributes
<cr>

[seokjohong]

Cisco supported 3.7.x and 3.6.x flexlinks.

However, 16.x.x does not support flexlink unilaterally.

Is not it too much?

There were no alternative technologies or guidelines.

What do you trust and use Cisco?

[paul driver]

Hello

Unfortunately  Flexlink is/has been depreciated in newer ios/xe trains, You could use however object tracking( line -protocol, ipsla, route etc..)

[seokjohong]

Thank you for your comment.

Flexlink can be used for various configurations.
I make many L2 configuration changes in industrial networks.
Redundancy can be configured very quickly.
With STP, you can not do anything for a default of 45 seconds.
There are many things that STP does not support in the default industry dummy hub.
So we used Flexlink to do a lot of improvements using Cisco switches.

There are a lot of problems because we do not support 16.x.x later.

ip sla is a good technology but difficult to use in an industrial network.

I want to have other skills.

Thank you.