Changing default config to have a separate ethernet port

RouterOS Beginner Basics
1

I have a RB751u-2hnd, setup as default with some minor changes (e.g. PPPoE connection on WAN interface). Ether ports 2-5 are switched - but I want to remove port 5 from the switch group, so I can assign a separate DHCP server to this port (and then do more things).
I changed the ether 5 master port to none:

interface ethernet print
Flags: X - disabled, R - running, S - slave 
 #    NAME                        MTU MAC-ADDRESS       ARP        MASTER-PORT                      SWITCH                     
 0 R  ether1-gateway             1500 00:0C:42:E2:1C:CB enabled   
 1 R  ether2-master-local        1500 00:0C:42:E2:1C:CC enabled    none                             switch1                    
 2 RS ether3-slave-local         1500 00:0C:42:E2:1C:CD enabled    ether2-master-local              switch1                    
 3  S ether4-slave-local         1500 00:0C:42:E2:1C:CE enabled    ether2-master-local              switch1                    
 4 R  ether5-alone               1500 00:0C:42:E2:1C:CF enabled    none                             switch1                    
[admin@MikroTik] >

And it successfully detects when a device is plugged in.

However, I cannot get a DHCP server to run, and if I look in the ‘Switch’ panel at the ‘Hosts’ tab, I see no record/MAC address of the device plugged into ether 5. I don’t know the terminal code to print this out to show.

My question is, do I need to do anything else to separate the ether 5 interface? I still have a bridge between WLAN and Ether 2:

 interface print
Flags: D - dynamic, X - disabled, R - running, S - slave 
 #     NAME                                                                             TYPE               MTU L2MTU  MAX-L2MTU
 0  R  wlan1                                                                            wlan              1500  2290
 1  R  ether1-gateway                                                                   ether             1500  1600       4076
 2  R  ether2-master-local                                                              ether             1500  1598       2028
 3  R  ether3-slave-local                                                               ether             1500  1598       2028
 4     ether4-slave-local                                                               ether             1500  1598       2028
 5  R  ether5-alone                                                                     ether             1500  1598       2028
 6  R  bridge-local                                                                     bridge            1500  1598
 7  R  pppoe-out1

My DHCP server on ether5 is declared invalid, but I want to check I am not doing something wrong with the port?

Thanks for any help.

2

I think I was looking for this code - there is a device plugged into Ether5 though.

/interface ethernet switch host print
Flags: D - dynamic, I - invalid 
 #   SWITCH                              MAC-ADDRESS       PORTS                                    TIMEOUT DROP MIRROR VLAN-ID
 0 D switch1                             00:0C:42:E2:1C:CC switch1_cpu                              2m      no   no    
 1 D switch1                             00:15:65:22:07:7D ether3-slave-local                       3m      no   no    
 2 D switch1                             00:23:32:C5:AF:E0 ether3-slave-local
3

I kept going and managed to get the DHCP server to work. I had to add a network in IP > Address List on the ether 5 interface.
I will leave the posts as I originally posted them in the hope that they help someone else.

My question still stands - on ether5 I do not see a device plugged in:

/interface ethernet switch host> print
Flags: D - dynamic, I - invalid 
 #   SWITCH                              MAC-ADDRESS       PORTS                                    TIMEOUT DROP MIRROR VLAN-ID
 0 D switch1                             00:0C:42:E2:1C:CC switch1_cpu                              2m      no   no    
 1 D switch1                             00:15:65:22:07:7D ether3-slave-local                       3m30s   no   no    
 2 D switch1                             00:23:32:C5:AF:E0 ether3-slave-local                       3m30s   no   no    
 3 D switch1                             00:26:BB:48:7C:61 switch1_cpu                              2m30s   no   no    
[admin@MikroTik] /interface ethernet switch host>

Is this by design?
Thanks for any assistance.