DHCP scope limits?

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David Hebel

• February 22, 2024 02:03

I have a purple that I replaced a Fortigate 60D with a my travel firewall a Firewalla Purple and have almost 200 DHCP clients and almost 20 statics across a few VLAN’s. During the day some devices are starting to have timeouts/are unreachable. This is only on DHCP hosts. Is there a DHCP host limit on the Purple that I do not know about? I use a Gold at my wife’s business and have move VLAN’s and close to 300 DHCP hosts that I know about (guest WiFi VLAN that has 250 available IP’s in scope).

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  Firewalla

  • February 22, 2024 02:59

  Do you mean the DHCP hosts not having IP address? or you can't ping them? what do you mean by "unreachable" (is this tested on LAN or WAN?)

   

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  David Hebel

  • February 28, 2024 23:56

  It is like the purple does not have enough resources to handout all of the hosts that need IP's via DHCP.  I put the 60D back on as an experiment and all my devices are getting IP's.  I put the purple back on the network and I have devices that are offline.  My laptop I had running a continuous ping to my carriers gateway was loosing random packets where my modem before the firewall was 100%.  Can the purple not handle about 200 DHCP clients?

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  Firewalla

  • February 29, 2024 05:18

  We've seen the purple handle much more than 200 clients. DHCP is not a CPU intensive task

  Also, is the issue that your clients NOT getting an IP? if they already have an IP and you see ping drop, then issue is not related to DHCP, it is related to something else. 

  The problem can be as simple as a bad cable, or as complex as a STP issue. Here is an article that has the steps to help you diagnose the issue https://help.firewalla.com/hc/en-us/articles/360053534593-How-do-I-debug-network-connectivity-issues

   

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  David Hebel

  • February 29, 2024 13:07

  That does not explain why once I revert back to the Fortigate, all DHCP issues clear.

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  Firewalla

  • February 29, 2024 19:11
  • Edited

  Pretty much anything can happen. Best is to use the article, if that does not work, contact help@firewalla.com for help.

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