USG FLEX 200H And 500H Reserved IP

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Gred57
Gred57 Posts: 6  Freshman Member
First Comment First Anniversary
in USG FLEX H Series

Hello,

Here's my problem: when I reserve an IP address, some devices are set to Reserved, while others disappear from the list.
Everything works normally, except I can't release the IP address if I need to.

How can I regain control?

I haven't found anything on this topic.

Sincerely,

image.png

Fred

Best Answers

  • PeterUK
    PeterUK Posts: 3,893  Guru Member
    100 Answers 2500 Comments Friend Collector Seventh Anniversary
    edited July 18 Answer ✓

    I believe this is a know issue if host names are the same even if the MAC's are different.

    So the best way to deal with this is set DHCP lease time to 3 minutes (which will not cause a drop in connection on renew) then you will start seeing device renew then to reserve a device that has the same host name copy its MAC check it and release it then click add and give it a new host name (note this will not change the device host name that it says it is) IP with the copied MAC and then that device will use that IP.

  • Zyxel_Tina
    Zyxel_Tina Posts: 82  Zyxel Employee
    Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Switch 5 Answers First Comment
    edited July 21 Answer ✓

    Hi @Gred57,

    We tried reproducing the issue on our side, but so far we haven't encountered the same behavior.
    To better understand what's happening, could you please provide a screen recording of your steps, showing how the problem occurs?

    This would really help us see the full context and assist you more accurately.

    Thanks in advance!

    Zyxel Tina

  • Gred57
    Gred57 Posts: 6  Freshman Member
    First Comment First Anniversary
    Answer ✓

    Hello, you're right, the native hostnames were identical. I changed the hostnames directly on the hardware, and now it's fine.
    Thank you.
    Sincerely,

All Replies

  • PeterUK
    PeterUK Posts: 3,893  Guru Member
    100 Answers 2500 Comments Friend Collector Seventh Anniversary
    edited July 18 Answer ✓

    I believe this is a know issue if host names are the same even if the MAC's are different.

    So the best way to deal with this is set DHCP lease time to 3 minutes (which will not cause a drop in connection on renew) then you will start seeing device renew then to reserve a device that has the same host name copy its MAC check it and release it then click add and give it a new host name (note this will not change the device host name that it says it is) IP with the copied MAC and then that device will use that IP.

  • Gred57
    Gred57 Posts: 6  Freshman Member
    First Comment First Anniversary

    Hello,

    I have completely different host names, but they contained a forbidden character, _, which I replaced with -.

    I restarted the USG, and that didn't fix my problem.

    I'll change the lease duration on Monday and let you know.

    Thank you for your reply.

    Have a good weekend.

  • Zyxel_Tina
    Zyxel_Tina Posts: 82  Zyxel Employee
    Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Switch 5 Answers First Comment
    edited July 21 Answer ✓

    Hi @Gred57,

    We tried reproducing the issue on our side, but so far we haven't encountered the same behavior.
    To better understand what's happening, could you please provide a screen recording of your steps, showing how the problem occurs?

    This would really help us see the full context and assist you more accurately.

    Thanks in advance!

    Zyxel Tina

  • Gred57
    Gred57 Posts: 6  Freshman Member
    First Comment First Anniversary
    Answer ✓

    Hello, you're right, the native hostnames were identical. I changed the hostnames directly on the hardware, and now it's fine.
    Thank you.
    Sincerely,

  • Gred57
    Gred57 Posts: 6  Freshman Member
    First Comment First Anniversary

    Hi Tina.

    Changing the hostname on the USG 200H or 500H
    E.g., Native hostname of device 1: device1 changed to hostnamedevice1
    Native hostname of device 2: device1 changed to hostnamedevice2

    makes lines with identical native hostnames disappear, even though I changed their names.

    Native hostname of device 1: device1 changed to hostnamedevice1 -> Reserved
    Native hostname of device 2: device1 changed to hostnamedevice2 -> Reserved -> Lines disappear.

    There you go.

    Best regards

    image.png

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