How to find the right MGNT Subinterface for DHCP Server on AP

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  • Updated 11 months ago
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Hello, i have HiveManagerNG on prem with AP230. We have multiple SSIDs in different Wlans configured. Now we need a local DHCP Server for one of the SSIDs/Vlans. So how can i find which MGNT Subinterface match the respective Vlan? With 7 SSIDs, i see 15 Subinterfaces. MGNT 0.1-MGNT0.15?
Thanks and Regards
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Neo

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Posted 12 months ago

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Crowdie, Champ

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The access point subinterfaces are matched to VLANs and subnets in their definition.  There is no specific order you have to create them either - MGT0.1 could be guest or BYOD, for example.  The only rule is that you can't use two different MGT subinterfaces on the the same VLAN.

So lets say we have a BYOD (VLAN 100 and subnet 192.168.100.0/24) and guest (VLAN 200 and subnet 192.168.200.0/24) WLAN and we want to create DHCP scopes for these on an access point using GoogleDNS as the DNS source.

The BYOD DHCP definition would look something like:

 

As this is the first DHCP scope we have selected MGT0.1 as the interface and the VLAN and subnets are defined below the Interface field.  One gotcha is the "Set the DHCP server as authoritative" option.  If you use this, which I recommend, on a multiple access point DHCP scope (i.e. you have a primary and secondary DHCP server access point then the IP pools cannot overlap.  For example, the primary DHCP access point would have the interface MGT0.1, subnet 192.168.100.0/24, VLAN 100 and the IP pool 192.168.100.10 to 192.168.100.125 while the secondary DHCP access point would have the interface MGT0.1, subnet 192.168.100.0/24. VLAN 100 and the IP pool 192.168.100.126 to 192.168.100.240.

The guest DHCP definition would look something like:



As it is the second DHCP scope created we selected the MGT0.2 subinterface.
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Neo

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Hello,

Thank you for your ANswer. But i use Hivemanager NG and there is no Vlan ID that can be choosen.
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Brian Powers, Champ

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Choose anything but mgt0 to create it and additional requirements will populate.  One being the VLAN ID.  See Crowdies mgt0.1?  Yours will need to mimic loosely.  You will then see the option for IP/SN, VLAN, etc.
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Neo

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Thank you that works...