Cat 8000v – no features

       You have a Catalyst   8000v  image  and  you are all excited because you want to test SRv6. You boot the image, go into the configuration mode and you see no configuration options. You go read the features included with the IOS once more and you see SRv6 in there, and on the box itself, you get nothing. What happened? 
       The answer is : you have not enabled a license. Long story short, you have network advantage vs network essentials, and dna advantage vs dna essentials. For your test environment, you want to have all the options, so you are to opt for network advantage and dna advantage. Let's see how this would unfold.

! Let's see how the licensing looks like at the beggining.

Router#show version
. . .

License Level:
License Type: Perpetual
Next reload license Level:

Addon License Level:
Addon License Type: Subscription
Next reload addon license Level:
. . .
Router#

! Next, let's check our options:

Router#conf t
Router(config)#seg?
% Unrecognized command

Router(config)#

! We get nothing. Let's enable the licensing. On to the second tab.

! Enabling network-advantage as the perpetual license and dna-advantage as the subscription license

Router(config)#license boot level network-advantage addon dna-advantage
% use 'write' command to make license boot config take effect on next boot

Router(config)#do wr
Building configuration...
[OK]
Router(config)#end

! Next we reload the box.

Router#reload
Proceed with reload? [confirm]

! Let's check the licensing after the reload

Router#sh ver
. . .

License Level: network-advantage
License Type: Perpetual
Next reload license Level: network-advantage

Addon License Level: dna-advantage
Addon License Type: Subscription
Next reload addon license Level: dna-advantage
. . .
Router#

! Next, let's check our options:

Router#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#segm
Router(config)#segment-routing ?
  mpls         Segment Routing MPLS Mode
  srv6         Segment Routing SRV6 Mode
  traffic-eng  Segment Routing Traffic-eng Mode

Router(config)#

! All good.

       For more information on the features each license has, you can check this link out.