DHCP Larger the 256

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CRU_Technologies
CRU_Technologies Posts: 27 image  Freshman Member
Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - WLAN Zyxel Certified Network Administrator - Nebula Zyxel Certified Network Administrator - Switch
in Security
HI,
I have had a quick look but can't see an answer.
On a USG300 is it possible to have a DHCP range larger than 256 addresses?
Simon.

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  • PeterUK
    PeterUK Posts: 4,629 image  Guru Member
    250 Answers 2500 Comments Friend Collector Eighth Anniversary
    Answer ✓
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    Yes just change the subnet
  • CRU_Technologies
    CRU_Technologies Posts: 27 image  Freshman Member
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - WLAN Zyxel Certified Network Administrator - Nebula Zyxel Certified Network Administrator - Switch
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    That simple ey? Would of been beneficial if the error on the USG was a bit more informative than 'Computer Says No'.
    Thanks though.
    Simon.
  • PeterUK
    PeterUK Posts: 4,629 image  Guru Member
    250 Answers 2500 Comments Friend Collector Eighth Anniversary
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    you can use this to help where Host Address Range will be and on the DHCP increase the pool size 
    Online IP Subnet Calculator (subnet-calculator.com)
  • mMontana
    mMontana Posts: 1,499 image  Guru Member
    Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Switch 50 Answers 1000 Comments
    edited September 2021
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    @CRU_Technologies AFAIK someone is managing a firewall should be aware about the 254 hosts limit of .C Class networks (subnet mask 24bits/255.255.255.0).
    I used 23 Bits mask (255.255.254.0) for allowing more than 300 customer devices into an hotspot network.

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