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Internet connection lost from the network after a power outage
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Internet connection lost from the network after a power outage

JustPfffJustPfff Member
edited January 2021 in Help

Recently i worked in company as system administrator, after previous admin left the company, he or someone else did the networks setup ~40 PC's connected to single router .
Anyway after a power outage(which happened almost everyday ) the internet connection lost for almost 10 min sometimes, the weirdies thing is when I **ping** to the router IP from windows command line I got 30% packages lost 😱 .
this should not supposed to be happened ,
The router were config to not use DHCP , each device had to enter the IP address manually .
The default gateway address were bit strange to me 192.168.0.200 could this cause the issue ?
Additionally employees phones are connected to the same network via WiFi, this increase devices connected to the network to ~80 and maybe more does this could cause IP conflict in the networks ?

Comments

  • yoursunnyyoursunny Member, IPv6 Advocate
    edited January 2021

    What model router is that?
    Many small-office routers cannot handle 80 devices.

    192.168.0.200 is surely not the problem.

    To determine whether there's an IP conflict, check every device (computers and phones) to see whether any two have the same IP configured.

    You can get a cabinet with 254 drawers numbered 1~254, and put each device into a drawer based on its IP. The router itself goes into drawer 200.
    If no drawer contains more than one device, you can rest assured that there's no IP conflict.

    See also https://tools.ietf.org/html/rfc2322 .
    I've been using peg-dhcp in my apartment during 2011-2016.

  • DPDP Administrator, The Domain Guy

    Thank god you don't work there anymore right :joy:

  • JustPfffJustPfff Member
    edited January 2021

    @yoursunny said: See also

    https://tools.ietf.org/html/rfc2322 .

    I've been using peg-dhcp in my apartment during 2011-2016

    Thanks for the reply, but this link are kinda of joke ?

  • I too would be asking some questions about the router but also about the connectivity. What level or broadband is the company paying for? Sufficient for 40 concurrent internet users and 40 concurrent phone users? Is the outage occurring at specific times of day, i.e. busy periods for the staff?

    @JustPfff I'm reading into what you said that this is a company in an office or offices, not a hosting or networking company with its own infrastructure?

  • @JustPfff said:
    Recently i worked in company as system administrator, after previous admin left the company, he or someone else did the networks setup ~40 PC's connected to single router .
    Anyway after a power outage(which happened almost everyday ) the internet connection lost for almost 10 min sometimes, the weirdies thing is when I **ping** to the router IP from windows command line I got 30% packages lost 😱 .
    this should not supposed to be happened ,
    The router were config to not use DHCP , each device had to enter the IP address manually .
    The default gateway address were bit strange to me 192.168.0.200 could this cause the issue ?
    Additionally yo PC's employees phones are connected to the same network via WiFi, this increase devices connected to the network to ~80 and maybe more does this could cause IP conflict in the networks ?

    What switches are you using?

    Chip

  • @yoursunny said:
    What model router is that?
    Many small-office routers cannot handle 80 devices.

    192.168.0.200 is surely not the problem.

    To determine whether there's an IP conflict, check every device (computers and phones) to see whether any two have the same IP configured.

    You can get a cabinet with 254 drawers numbered 1~254, and put each device into a drawer based on its IP. The router itself goes into drawer 200.
    If no drawer contains more than one device, you can rest assured that there's no IP conflict.

    See also https://tools.ietf.org/html/rfc2322 .
    I've been using peg-dhcp in my apartment during 2011-2016.

    Peg-dhcp is a boss idea.... thanks for this @yoursunny

    Thanked by 1yoursunny
  • @JustPfff said: Thanks for the reply, but this link are kinda of joke ?

    If you don't like to implement RFC2322 you may want to give RFC2549 a try. Includes QoS too.

    Thanked by 1yoursunny
  • JustPfffJustPfff Member
    edited January 2021

    @saibal said:

    @JustPfff said: Thanks for the reply, but this link are kinda of joke ?

    If you don't like to implement RFC2322 you may want to give RFC2549 a try. Includes QoS too.

    Yea yea yeah, i read the date BTW

    1 April 1999

    sure since I'm not network specialist , network gurus around here will joke about it, take your time buddy

    @dominame said: I'm reading into what you said that this is a company in an office or offices, not a hosting or networking company with its own infrastructure?

    They are kind agency that do paper works/invoices for other(big companies), they mostly use Outlook to read emails, Excel to store modify some data, and a Windows cloud special application that runs online,
    so yeah we have almost ~80 concurrent connection , the phones used to send and receive Whatsapp messages (mostly images ) .

    @chip said: What switches are you using?

    I don't know I need to check it tomorrow,
    BTW I'm not responsible on networks installation since it's was done by someone else, it's will take from me time to diagnose it and know what;s wrong .

    BTW the internet connection the company supposed to be 8Mbit/s but I test it more then once and it's was at best 3.8Mbit/s and some times down to 512Kbit/s , they're subscript to unlimited bandwidth plan, and the provider website mentioned 3Mbit/s guarantees which is complete BS,
    But I could not imagining even with this bad internet connection source to becomes so slow that opening a web page take ages ,
    As I mentioned earlier I did that test when Only two devices were connected to the network , one of my tests I got 30% signal lost when I pinged the router IP, and Google 8.8.8.8 IP ,
    I suspected about the small Wifi dongle that attached to each PC are not provide good single + there is too many Wifi device in the building, Mobile phones laptops this could create noises officiates Wifi radio frequency

  • If the WIFI is slow is it wifi interference?
    If its cabled (wired) devices poor cabling or a switch with low/insufficient switching capacity?... we had a client complaining there Internet was slow (they where on gfast so 330+mbps) speed was good from the router but was terribly poor "connected to the network" ( less than 30mbps) .... turns out the 20+ year old switch the client was so attached to had a switching capacity of 4.8gbps.... and just couldn't keep up... swapped switch issue resolved

    Chip

    @JustPfff said

    @chip said: What switches are you using?

    I don't know I need to check it tomorrow,
    BTW I'm not responsible on networks installation since it's was done by someone else, it's will take from me time to diagnose it and know what;s wrong .

    BTW the internet connection the company supposed to be 8Mbit/s but I test it more then once and it's was at best 3.8Mbit/s and some times down to 512Kbit/s , they're subscript to unlimited bandwidth plan, and the provider website mentioned 3Mbit/s guarantees which is complete BS,
    But I could not imagining even with this bad internet connection source to becomes so slow that opening a web page take ages ,
    As I mentioned earlier I did that test when Only two devices were connected to the network , one of my tests I got 30% signal lost when I pinged the router IP, and Google 8.8.8.8 IP ,
    I suspected about the small Wifi dongle that attached to each PC are not provide good single + there is too many Wifi device in the building, Mobile phones laptops this could create noises officiates Wifi radio frequency

  • Is this a Windows 10 network? I had a similar problem with Windows 10 earlier.

  • JustPfffJustPfff Member
    edited January 2021

    @chip said:
    If its cabled (wired) devices poor cabling or a switch with low/insufficient switching capacity?... we had a client complaining there Internet was slow (they where on gfast so 330+mbps) speed was good from the router but was terribly poor "connected to the network" ( less than 30mbps) .... turns out the 20+ year old switch the client was so attached to had a switching capacity of 4.8gbps.... and just couldn't keep up... swapped switch issue resolved

    Chip

    Thanks Chip for the valuable reply, BTW I'm not living on the US, and my country always had bad internet connection and bad communication infrastructure ,
    the company they subscribe to uses WiFi towers to provide internet connection(because WiFi bandwidth does not required License ) their signal can't reach inside the building so they provide long Range WiFi Antenna/receiver , I take one look at that receiver and it was inside the building(connected to the switch ) I didn't check the Antenna, but I think it's in the roof.

    If the WIFI is slow is it wifi interference?

    I notice only two or three PC's connected via the wire they mostly uses other Routers to provide connection to other devices via WiFi .

  • JustPfffJustPfff Member
    edited January 2021

    @DreamCaster said: Is this a Windows 10 network? I had a similar problem with Windows 10 earlier.

    ~70% of PC's uses Windows 10, this issue I don't have peremptory solution yet, I already talk to the manger about it and he kinda didn't believed me (They still think they have the best internet connection on the world, because they paid fortune to have it)

  • DPDP Administrator, The Domain Guy

    @JustPfff said:

    @DreamCaster said: Is this a Windows 10 network? I had a similar problem with Windows 10 earlier.

    ~70% of PC's uses Windows 10, this issue I don't have peremptory solution yet, I already talk to the manger about it and he kinda didn't believed me (They still think they have the best internet connection on the world, because they paid fortune to have it)

    So when it happens, it happens to all the PCs, or just some?

    Because sometimes with W10, restarting the adapter helps, or worst case scenario, reboot the machine.

  • JustPfffJustPfff Member
    edited January 2021

    @thedp said: Because sometimes with W10, restarting the adapter helps, or worst case scenario, reboot the machine.

    Since I'm the new guy, I can't force the employee restart his machine, while he's working on it, they kinda want to force their opinion on me, and i can't win technical discuss with an ignorant .
    Anyway I want to applies procedure to make that network only connected to business website the company uses, to save my self the headache, as I notice one device have Hola VPN to baybass any restriction, the ugly fact is this company loses money because this lazy employees behaviour, and I'm the first person who will blame for that .

  • DataIdeas-JoshDataIdeas-Josh Member, Patron Provider

    @JustPfff what router are they using?
    If your saying that the building gets frequent power issues then the router/switches might be damaged. Today most consumer/prosumer equipment is designed to have a fairly"clean" power and will work great or awhile.
    Most things I highly recommend for clients that have power issues and frequent issues with their network is to put it on a UPS.

    Feel free to send me a PM. I can give you my number and I can help you out more if you want.
    ~Josh

    Thanked by 1JustPfff
  • DPDP Administrator, The Domain Guy

    Where are you located btw? If you don’t mind me asking out of curiosity.

  • @JustPfff said:

    @chip said:
    If its cabled (wired) devices poor cabling or a switch with low/insufficient switching capacity?... we had a client complaining there Internet was slow (they where on gfast so 330+mbps) speed was good from the router but was terribly poor "connected to the network" ( less than 30mbps) .... turns out the 20+ year old switch the client was so attached to had a switching capacity of 4.8gbps.... and just couldn't keep up... swapped switch issue resolved

    Chip

    Thanks Chip for the valuable reply, BTW I'm not living on the US, and my country always had bad internet connection and bad communication infrastructure ,
    the company they subscribe to uses WiFi towers to provide internet connection(because WiFi bandwidth does not required License ) their signal can't reach inside the building so they provide long Range WiFi Antenna/receiver , I take one look at that receiver and it was inside the building(connected to the switch ) I didn't check the Antenna, but I think it's in the roof.

    If the WIFI is slow is it wifi interference?

    I notice only two or three PC's connected via the wire they mostly uses other Routers to provide connection to other devices via WiFi .

    Ah OK that makes sense.... im in the UK and over here those land based WIfI systems are known to drop out and have terrible packet loss... they are also terribly expensive... over here in the UK they put the WIFI reciever on the roof and cables down to the comms cabinet... what you plug in after that is your issue (routers, switches etc)

  • JustPfffJustPfff Member
    edited January 2021

    @DataIdeas-Josh said: If your saying that the building gets frequent power issues then the router/switches might be damaged

    Thank you Josh for assistance, I'm glad to talk to you but my vocal English are terrible and you properly wont understand what's I'm saying,
    Devices damage are something in my mind same cape happened to the PC's, the company had UPS but they stop working too after 1 year usage, ( they're properly cheap ones )

    Anyway I think you last word @DataIdeas-Josh opened my mind at this company situation, they have representatives who buy to them equipment, and looks like these people brings the cheapest sht from the market (like that crappy UPS) a day ago I ask the representatives to bring to me two 16GB flash pendrive and the one he bring to me get fulled after reach 8GB of storage, I was need that drive to fix some PC's issues(Viruses) but I end up having 8GB and very slow transfers speed , so it wont be strange if all equipment are like that .

  • DataIdeas-JoshDataIdeas-Josh Member, Patron Provider

    @JustPfff if the UPS is only lasting a year. Then it's probably taking quite a beating from the power coming into the facility.
    Is your power 120v60hz or 240v50hz.
    If you are able to look into one of these.
    A very handy tool for power usage
    http://www.p3international.com/products/p4400.html
    It can also help you see on what is exactly coming into the building.

    It sounds like its a power issue more than networking.
    If you can get a clean consistent power then start to work on fixing the network.
    If you fix the network without fixing the power then you are wasting money as the issue can still exist.

    I can help you out on specing out a system for you on the business needs.
    ~Josh

    Thanked by 2dominame JustPfff
  • @DataIdeas-Josh said: if the UPS is only lasting a year. Then it's probably taking quite a beating from the power coming into the facility.

    Is your power 120v60hz or 240v50hz.

    If I remember it correctly we use 220V60Hz main power source, when power outage happened they switch to diesel generator.

    Anyway today is Saturday and few ppl working in the building, the network situation were perfect, there was internet connection lose for 4 hours(from the source), but when it come back the connection were good,
    The switch they use are Catalyst 2950 , it's connected to TL-WR840N which is connected to Mikrotik modem via WAN line

  • @JustPfff said:

    @DataIdeas-Josh said: if the UPS is only lasting a year. Then it's probably taking quite a beating from the power coming into the facility.

    Is your power 120v60hz or 240v50hz.

    If I remember it correctly we use 220V60Hz main power source, when power outage happened they switch to diesel generator.

    Anyway today is Saturday and few ppl working in the building, the network situation were perfect, there was internet connection lose for 4 hours(from the source), but when it come back the connection were good,
    The switch they use are Catalyst 2950 , it's connected to TL-WR840N which is connected to Mikrotik modem via WAN line

    You know that switch i said a client was attached too.... you couldn't write this but it was a catalyst 2950-24 ... 4.8gbs throughput which was perfect back in the days of small files and dialup

    https://btbusiness.custhelp.com/app/answers/detail/a_id/11094/~/what-are-the-technical-specifications-of-the-cisco-2950-switch?

  • JustPfffJustPfff Member
    edited January 2021

    @chip said: was perfect back in the days of small files and dialup

    OG so it was that bad, BTW the company start working in 2013 , and that switch back to 2006 or even before (according to it documents ) , this is the mikrotik modem , as I mention that internet service provider uses 5Ghz frequency, lucky most home router WiFi devices still uses 2.4Ghz frequency
    Anyway I'll write another post here or in other forum to assist me blocking all bad/bandwidth consuming sites from TL-WR840N .

  • @JustPfff said:

    @chip said: was perfect back in the days of small files and dialup

    OG so it was that bad, BTW the company start working in 2013 , and that switch back to 2006 or even before (according to it documents ) , this is the mikrotik modem , as I mention that internet service provider uses 5Ghz frequency, lucky most home router WiFi devices still uses 2.4Ghz frequency
    Anyway I'll write another post here or in other forum to assist me blocking all bad/bandwidth consuming sites from TL-WR840N .

    The microtik looks nice.... to be fair microtik is normally good stuff also.... 5ghz WiFi is faster however it also suffers more with interference

  • @JustPfff said:

    @chip said: was perfect back in the days of small files and dialup

    OG so it was that bad, BTW the company start working in 2013 , and that switch back to 2006 or even before (according to it documents ) , this is the mikrotik modem , as I mention that internet service provider uses 5Ghz frequency, lucky most home router WiFi devices still uses 2.4Ghz frequency
    Anyway I'll write another post here or in other forum to assist me blocking all bad/bandwidth consuming sites from TL-WR840N .

    And yes 4.8gbps is shocking considering the likes of this:

    https://www.broadbandbuyer.com/products/37841-ubiquiti-usw-24-poe/specifications/#content

    Has a switching capacity of 52gbps and that's not even "high end" some of the really high end switches are 500gbps..... they also cost thousands

  • @JustPfff said: ~70% of PC's uses Windows 10, this issue I don't have peremptory solution yet, I already talk to the manger about it and he kinda didn't believed me (They still think they have the best internet connection on the world, because they paid fortune to have it)

    My issue was with a Windows 10 network of 8 PCs. Upon checking system logs, i saw that Windows Update tried to somehow update ethernet drivers when the power came back on and messed up with it. Rolling back to old drivers and a few system restarts as well as the router reboot solved my issue. Yours is a much bigger network but I do not know. Just wanted to help. May be this could be useful to your or someone else reading this.

    Thanked by 1JustPfff
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