Network becomes totally unusable when my parents connect
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@RickyBaker Perhaps a long shot, and probably not related, but somehow I get a feeling it resembles some problems I had when running KEA DHCP. Have you changed to that at some point?
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@Gblenn Yeah i think that was brought up when i was troubleshooting this other DNS issue but I'll double check, thank you for the suggestion:
https://forum.netgate.com/topic/187510/dns_probe_finished_nxdomain-sporadically-for-anywhere-from-30secs-to-10min-works-flawlessly-at-all-other-times/174?_=1744398908972
Spoiler alert, i solved that problem by disabling IP6 with "do-ip6: no" in the advanced settings of the DNSResolver...
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@Gblenn said in Network becomes totally unusable when my parents connect:
@RickyBaker Perhaps a long shot, and probably not related, but somehow I get a feeling it resembles some problems I had when running KEA DHCP. Have you changed to that at some point?
so you're suggesting reverting the KEA change? and using the old method? (Just clarifying)
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@RickyBaker looking in the logs for frequent DHCP restarts would be worth checking
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@RickyBaker this sounds like a broadcast storm
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@Gblenn said in Network becomes totally unusable when my parents connect:
KEA DHCP
So you're suggesting reverting this?
@Patch said in Network becomes totally unusable when my parents connect:
@RickyBaker looking in the logs for frequent DHCP restarts would be worth checking
There were no instances of the word "restart" in the dhcp log and 16 in the System Log but mostly for php-fhm whatever that is...
general - https://pastebin.com/uCUtJS6h
dhcp - https://pastebin.com/ZenrdC5Y
dnsresolver - https://pastebin.com/MaVHpXYzSorry for all the delays, it's very difficult to make these pastes with poor internet. fwiw accessing things in my LAN is very fast. Also, as I'm loading these logs into Pastebin. I can get, say, 2 in and uploaded but then it'll freeze up and say that pastebin can't be reached for a few minutes. Then a few minutes later it'll work fine....for a few minutes.
@JonathanLee said in Network becomes totally unusable when my parents connect:
this sounds like a broadcast storm
Does the above still sound like a broadcast storm? I've never heard of this term...will be googling now but if there are any other logs I can post to confirm this I would be happy to provide...
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@RickyBaker said in Network becomes totally unusable when my parents connect:
fwiw accessing things in my LAN is very fast
So basically what you are saying is that it's all wifi related? I so, that is where I would focus... Check you channel allocation across that AP's as discussed.
@RickyBaker said in Network becomes totally unusable when my parents connect:
so you're suggesting reverting the KEA change? and using the old method? (Just clarifying)
Yes that is what I was suggesting. Not sure though, if it's all wifi related, but reverting to ISC won't hurt during your testing...
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@RickyBaker said in Network becomes totally unusable when my parents connect:
Well i found something def not good while trouble shooting something unrelated...
@stephenw10 said in Network becomes totally unusable when my parents connect:
There were quite a few link state changes in the logs and I wouldn't expect to see any in normal running between pfSense and a switch.
Yes most managed switches have some ability to detect bad traffic (a loop, packet storm/flood) and disconnect a port to prevent it. So potentially it might be doing that but it should log it if so.
Imo this is the cause of your problems
To fix it you probably need to draw a network structure diagramYou have a VPN. How is that segmented on your network?
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@Gblenn said in Network becomes totally unusable when my parents connect:
So basically what you are saying is that it's all wifi related? I so, that is where I would focus... Check you channel allocation across that AP's as discussed.
I don't think it's WiFi related. It happens on my hard wired PC as well... however that thing is ancient but it's my only one. I might plug in a laptop and hunker next to the rack for a half hour or so and double check that it's also present in wired connections. But I'm able to pull up, say, the UI for the pfsense or the unraid dockers without the delays and stream netflix. I don't know that much about networking but it almost seems specific to certain types of traffic like translating webpages. My IoT devices get kicked off every now and then but mostly work and I've never experienced a time i can remember when i couldn't stream Netflix for example...
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@RickyBaker
You have a loop in your network. We don't have enough information whether that's the symptom or the cause. As suggested, you need to deconstruct your network and figure out what is in place. Do you have an unmanaged switch in the mix - in your case a non Unifi switch. Ive seen cases where a cable was plugged into one switch port and the other end plugged into the same switch but different port (why? who knows...). Kea has nothing to do with Layer2 loops. Neither does Unbound.
In either case, the network is protecting itself. -
@Patch said in Network becomes totally unusable when my parents connect:
You have a VPN. How is that segmented on your network?
Does this have the information you were asking about?
@michmoor said in Network becomes totally unusable when my parents connect:
You have a loop in your network
yeah it really feels like this is right...
@michmoor said in Network becomes totally unusable when my parents connect:
Do you have an unmanaged switch in the mix - in your case a non Unifi switch.
no, all unifi switches. 1 is daisy chained but it's unifi and i see it in the controller software. There are no more STP blocked ports since I unplugged that last AP and I still have no idea how that happened (the statically assigned IP seems find in the DHCP server but I haven't tried to plug it back in yet)...
Is there any way to track this down with Wireshark? I would imagine the broadcast storm mentioned earlier is easier to troubleshoot with wireshark but while it's running I was curious if something would help me track down this loop....
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@RickyBaker said in Network becomes totally unusable when my parents connect:
There are no more STP blocked ports since I unplugged that last AP and I still have no idea how that happened (the statically assigned IP seems find in the DHCP server but I haven't tried to plug it back in yet)...
Are we still having the issue with the network when your parents come over after that change?
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@michmoor my parents left a long time ago so I haven't been testing with their devices. But yes the network is still bad.
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I believe you have two different issues. The most obvious as has been stated is a Layer 2 loop. You have something miswired/misrouted.
The problem with your parents' device is I belive a duplicate IP address. Could they maybe have had a statically assigned IP address in one of their devices that matched the IP address of a critical component in your local network such as perhaps one of the firewall interfaces? The symptoms you described at that time (way back up earlier in this thread) sure sounded like a duplicate IP address problem.
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Not sure what this means but I was just poking around pfsense and saw that the ipv6 Configuration type was set to Track Interface. Seeing as this was an issue when i was having a DNSResolver issue and that i'm not using ipv6 (intentionally at least) I turned it to none but got 2 errors about disabling DHCPv6 Server and Router Advertisement first. I really don't know what the second thing is or what disabling it will break but i'm desparate so I'm giving "None" a try....
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@RickyBaker said in Network becomes totally unusable when my parents connect:
got 2 errors about disabling DHCPv6 Server and Router Advertisement first. I really don't know what the second thing is or what disabling it will break
If you have no IPv6 available from your ISP and you have not configured your WAN to use it, then it won't break anything. You can go to SERVICES > ROUTER ADVERISEMENT and set the RA daemon to "disabled" on all interfaces. Why did you turn this on in the first place?
If you are just browsing around in pfSense and randomly clicking stuff without knowing what it specifically does, then no wonder you are having issues
. You might benefit from a completely fresh green-field reinstall WITHOUT importing any old configuration. -
@bmeeks said in Network becomes totally unusable when my parents connect:
You have something miswired/misrouted.
I agree, just having a hard time tracking this down...
@bmeeks said in Network becomes totally unusable when my parents connect:
The problem with your parents' device is I belive a duplicate IP address. Could they maybe have had a statically assigned IP address in one of their devices that matched the IP address of a critical component in your local network such as perhaps one of the firewall interfaces?
I also can get behind this theory as well, especially the second part of it.
All their devices were configured to get an IP from the DHCP server (though were also originally configured to randomize the mac address, which i changed). Also I use 10.10.10.1/24 and there is no way they have a statically assigned address in that range. If i was using 192.168.1.1/24 sure i could believe it but just very unlikely anything is statically assigned to the 10.10.10.1 range. Though maybe it has something to do with their devices barfing at that subnet....
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@bmeeks said in Network becomes totally unusable when my parents connect:
If you have no IPv6 available from your ISP and you have not configured your WAN to use it, then it won't break anything. You can go to SERVICES > ROUTER ADVERISEMENT and set the RA daemon to "disabled" on all interfaces. Why did you turn this on in the first place?
I have att fiber so I assume it's available but I don't intentionally use it. I do not remember ever turning this on.
@bmeeks said in Network becomes totally unusable when my parents connect:
then no wonder you are having issues .
these are desperate times. I do NOT do this normally.
@bmeeks said in Network becomes totally unusable when my parents connect:
You might benefit from a completely fresh green-field reinstall WITHOUT importing any old configuration.
This is getting closer and closer to possible. I simply don't know what to do and REALLY don't want to reattach all my hundreds of devices again....
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@RickyBaker said in Network becomes totally unusable when my parents connect:
there is no way they have a statically assigned address in that range.
That's a pretty bold statement to make unless you actually verified it on each of their devices. The symptoms you described at that time certainly seemed like a duplicate IP problem.
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@RickyBaker said in Network becomes totally unusable when my parents connect:
I do not remember ever turning this on.
It is not enabled out-of-the-box with any pfSense installation. It had to be enabled by you or another admin.
