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    • Dashrender

      Using non MS DHCP in MS AD
      IT Discussion • active directory dhcp • • Dashrender

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      Dashrender

      @JaredBusch said in Using non MS DHCP in MS AD:

      Setup the way I show, Windows DNS still gets updated form workstations.

      03b94431-bd00-4eb2-ad58-a26eb0814fd0-image.png

      Good to know Windows is doing what it's supposed to do!

      Thanks Jared

    • JaredBusch

      Clear DHCP Hostnames for your devices are useful
      IT Discussion • dhcp hostname yealink pbx router updates sip listen port • • JaredBusch

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    • DustinB3403

      Windows Domain routing question - dual-nic
      IT Discussion • lab question routing dhcp dns windows • • DustinB3403

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      DustinB3403

      @Dashrender said in Windows Domain routing question - dual-nic:

      Though - if you have a second layer network like this, you'll need to inform your external router on the internal networks and how to route them.

      Routing to the internet is mostly just a nice to have.

    • WrCombs

      DHCP Question...
      IT Discussion • wrcombs dhcp networking • • WrCombs

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      scottalanmiller

      @JasGot said in DHCP Question...:

      I guess I am going back subnet school.

      I found it, it's in the faded greyed out area under the red rectangle.

    • scottalanmiller

      Tool for Finding Rogue DHCP
      IT Discussion • dhcp networking • • scottalanmiller

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      Dashrender

      @wrx7m said in Tool for Finding Rogue DHCP:

      Ran into this about 12 years ago. A guy on the dev team decided to setup his own DHCP server. Screwed up all sorts of stuff. Can't remember for sure what we did, but I think after we realized that it wasn't actually an issue with our known DHCP servers, we decided to talk to the dev team and found out that is what he had done.

      It amazes me how many people just don't think about it - they have a problem, they think they know how to solve it, and just slap something onto the network.

    • J

      Need to better understand IP Helper for accessing Windows DHCP Server from VLAN.
      IT Discussion • dhcp ip helper iphelper vlan • • JasGot

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      Dashrender

      @JasGot said in Need to better understand IP Helper for accessing Windows DHCP Server from VLAN.:

      @Dashrender said in Need to better understand IP Helper for accessing Windows DHCP Server from VLAN.:

      did you say you have Unifi APs? If so, what firmware?
      https://community.ui.com/releases/UAP-USW-Firmware-4-0-69-10871/245e428c-d111-4b9d-a550-ec0cc86ef646?page=12

      I saw that too, thanks. I have all Unifi Ap-AC-Pro with 4.0.66.10822 firmware. I have the same experience with all firmware versions. I went back about ten revisions.

      I've been having some network performance issues at home since upgrading to 4.0.69.xxx - though I didn't put 2 and 2 together until I was researching fixing my Cloud Key and ran into that thread.

    • B

      Server 2012R2 DHCP reservations problem with my VOIP equipment?
      IT Discussion • yealink server 2012 r2 dhcp • • bnrstnr

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      B

      @JaredBusch said in Server 2012R2 DHCP reservations problem with my VOIP equipment?:

      I never use reservations for phones.

      Specifically with Yealink phones, I set the DHCP hostname value in the config file.

      So when I am on the network, I can easily just ping ext103.domain.local and shit..

      Or If I look at the DHCP server lease list, I see the hostnames listed as ext101, ext103, etc.

      c1f3dca6-fa20-4b66-9d59-87af092bf42f-image.png

      Love this idea

    • steve

      Configuring DHCP - CompTIA Network+ N10-007 Prof. Messer
      Training • dhcp prof messer networking network+ certification comptia youtube video training it training it career • • steve

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    • steve

      DHCP Addressing Overview - CompTIA Network+ N10-007 Prof. Messer
      Training • dhcp networking network+ prof messer comptia certification youtube video training it training it career • • steve

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    • Pete.S

      Solved How do you find dhcp servers on network?
      IT Discussion • dhcp • • Pete.S

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      JaredBusch

      @Pete-S click the menu (three stacked dots) by the post that had the answer so others know which solution worked best for you.

    • FATeknollogee

      Fedora WS: (simultaneous) install on multiple pc's
      IT Discussion • fedora workstation install dhcp pxe • • FATeknollogee

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      coliver

      @DustinB3403 said in Fedora WS: (simultaneous) install on multiple pc's:

      @coliver said in Fedora WS: (simultaneous) install on multiple pc's:

      @DustinB3403 said in Fedora WS: (simultaneous) install on multiple pc's:

      @Dashrender said in Fedora WS: (simultaneous) install on multiple pc's:

      You could deploy an image using FOG

      While this was my initial thought as well, he has asked about doing this simultaneously. Which fog generally isn't "all at once go".

      It kind of is...I was using FOG to do multicast imaging 7 years ago. We're talking 30-60 machines at a clip.

      Sure it can do it but that doesn't mean that you should do it. It's about network performance and if you're not setup for it you'll encounter massive slowdowns

      Mutlicast is the way to go. You can even do it over broadcast domains. It sounds like you didn't have multicast configured correctly? Even doing 60 machines we didn't see any network slowness associated with imaging.

    • JaredBusch

      Where do I start with replacing the whole MS AD stack
      Water Closet • microsoft active directory ad dhcp dns • • JaredBusch

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      Emad R

      @Donahue said in Where do I start with replacing the whole MS AD stack:

      sing reservations.

      I think your knowledge of FG is not allowing you to do this, just create a new interface with the desired subnet and leave or tick DHCP option. And they you can do it what you want with it. Create an IPv4 policy to give access to internet to the new interface.

    • scottalanmiller

      Getting DHCP BAD_ADDRESS on Windows DHCP
      IT Discussion • dhcp windows dhcp windows server • • scottalanmiller

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      CCWTech

      So what we are pretty sure we have narrowed it down to is a WiFi device that reports the temperature of the refrigerator to an online portal that sends out notifications when there is an out of range event.

      There is an inside the fridge sensor and that sends the information to a receiver outside the fridge. The receiver part is what has the WiFi built in. I think the inside sensor to outside receiver communicate using 900 Mhz.

      Who would have thought to check the refrigerator?

    • Romo

      Set static ip for Hyper-V Server 2016 virtual ethernet adapter.
      IT Discussion • hyper-v 2016 networking static dhcp • • Romo

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      scottalanmiller

      @obsolesce said in Set static ip for Hyper-V Server 2016 virtual ethernet adapter.:

      @scottalanmiller said in Set static ip for Hyper-V Server 2016 virtual ethernet adapter.:

      @obsolesce said in Set static ip for Hyper-V Server 2016 virtual ethernet adapter.:

      There are a lot of options rather than spending weeks figuring out such a dumb issue.

      Having to bring in a local tech or get a swing machine are actually much more intensive than looking at it remotely for a while. But seems doubtful that it will take weeks. Only has had a few minutes of being looked at, and only today.

      Oh, didn't realize it was like that. No local IT, no other available infrastructure or anything kind of limits things a lot.

      Yeah, a LOT. If we were local and it was one of two (or more) machines, yeah, we'd happily reinstall. As it is, we are scared of the backup device failing. Which isn't terrible as it is ONLY a backup device. But taking the server offline... we are pretty dependent on it.

    • JaredBusch

      Use DHCP option 43 on Windows Server to tell UniFi devices how to find the controller
      IT Discussion • unifi dhcp option 43 microsoft windows server guide how to • • JaredBusch

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      JaredBusch

      @tim_g said in Use DHCP option 43 on Windows Server to tell UniFi devices how to find the controller:

      @jaredbusch

      I see, so just setting option 43 on whatever DHCP server you use is all you need. Nothing hardware specific is required on the network.

      Correct

    • B

      Windows Server 2012R2 DHCP Server Memory Leak?
      IT Discussion • dhcp windows 2012 r2 2012 r2 memory leak • • bnrstnr

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      Obsolesce

      @bnrstnr said in Windows Server 2012R2 DHCP Server Memory Leak?:

      I have some warnings and errors in the event viewer that I'm going through now. Is there any reason to have IPv6 enabled if we're not using it? A lot of warnings in there about IP6 supposed to be static only.

      I wouldn't disable ipv6 unless you are unable to find and fix the real root cause of an issue in which disabling ipv6 may mask.

      https://blogs.technet.microsoft.com/askpfeplat/2013/06/16/ipv6-for-the-windows-administrator-why-you-need-to-care-about-ipv6/

      https://blogs.technet.microsoft.com/jlosey/2011/02/02/why-you-should-leave-ipv6-alone/

      https://cwing.wordpress.com/2013/05/20/ipv6/

    • mlnews

      Home Network Setup
      IT Discussion • xp dhcp dns home lab xenserver kvm ubiquiti virtualization sophos linux untangle • • mlnews

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      jmoore

      @scottalanmiller said in Home Network Setup:

      @jmoore said in Home Network Setup:

      @scottalanmiller said in Home Network Setup:

      @dashrender said in Home Network Setup:

      The whole crux of my ask was - the desire to buy as few Windows Server CALs as possible.

      This is unrelated to the question asked, though.

      you know i have noticed you and dash really communicate differently. not good or bad, just different. then you both have trouble understanding the other. from the many threads i have read with you two, that is the common theme i have seen.

      I'd assume part of it is that I am highly literal. That tends to be a root of many communications issues for me in general.

      yeah i think your right you are literal. i had to adjust my communication with you. that was my fault though, i am used to having to be so unliteral with my users because i would lose them that i got into that bad habit lol. i know for me, i was not explaining my thoughts in a well laid out way and that made me harder to understand and threw you off. did i do better that time?

    • JaredBusch

      Solved DHCP on Server 2012 R2 does not understand Fedora 25
      IT Discussion • fedora 25 dhcp server 2012 r2 • • JaredBusch

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      JaredBusch

      So coming back to this (because I was setting some more stuff up), it seems that Windows DHCP Server does understand the RFC, that is why it actually sees and uses the entire machine ID sent by default.

      It is other devices like my EdgeRouters that I have to use the MAC address.

      The only problem with the machine ID scheme is that I have no idea what it is before the machine is created.

      Granted this is mostly my problem because I always use DHCP reservations instead of static IP addresses (evil fucking things, those).

      I continue to force the new systems to use the hardware ID, because I want to only track the MAC address hex info.

    • S

      Strange DHCP Issue
      IT Discussion • dhcp • • Sparkum

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      S

      Awesome thanks guys, I'll wait for the next computer to go down then I'll report back with results!

    • D

      Cisco DHCP, MS DNS
      IT Discussion • dhcp dns cisco • • deleted23224

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      D

      @scottalanmiller we have an ERP system that MOST of the companies work is done in.

      They could still use office and such, but without the link the ERP stuff is useless. Production could continue on paper, it would just slow down

      Email isnt local either, we use cloud based email which is stemmed from the datacenter.

      That is a good point thank you for mentioning that