Network discovery takes very long time

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  • Bigtroll001
    Bigtroll001 Posts: 14
    First Comment First Anniversary
    I have tried to change DNS settings on NEBULA "From ISP" to "static" and entered 8.8.8.8. And turned IPv6 off as ISP apparently do not provide a IPv6 DNS server

    Rebooted router

    DNS1 and 2 still comes from ISP.

    So I'm apparently not allowed to change DNS setting.

    I have attached screendumps
  • Bigtroll001
    Bigtroll001 Posts: 14
    First Comment First Anniversary
    I managed to changed it to use google dns (8.8.8.8 and 8.8.4.4) as DNS service

    C:\Users\NilsB>nslookup 3.dk
    Server:  dns.google
    Address:  8.8.8.8

    Non-authoritative answer:
    Name:    3.dk
    Addresses:  2a02:aa0:28:a000::1007
              80.251.200.7


    C:\Users\NilsB>tracert google.com

    Tracing route to google.com [142.250.74.174]
    over a maximum of 30 hops:

      1     2 ms     1 ms     1 ms  192.168.1.1
      2     *        *        *     Request timed out.
      3    18 ms    11 ms    10 ms  10.66.201.1
      4    24 ms    12 ms    10 ms  10.66.199.1
      5    32 ms    11 ms    11 ms  10.66.201.170
      6    26 ms    12 ms    12 ms  95.209.204.252.bredband.tre.se [95.209.204.252]
      7    35 ms    25 ms    25 ms  10.66.190.9
      8    29 ms    21 ms    27 ms  142.250.164.130
      9    35 ms    21 ms    22 ms  142.250.213.181
     10    26 ms    19 ms    20 ms  142.251.236.71
     11    27 ms    19 ms    20 ms  arn11s12-in-f14.1e100.net [142.250.74.174]

    Trace complete.

    C:\Users\NilsB>


  • Bigtroll001
    Bigtroll001 Posts: 14
    First Comment First Anniversary
    Just tested the speed.

    Server discovery for speedtest on my phone is less that 1 sec. Download speed > 1Gb
    Server Discovery for speedtest on WiFi6/1.2Gb connection to Nebula > 15 sec. Download speed < 200Mb

    Nebula and phone connected to same 5G cell on same network from same carrier.
    CPU power on phone and Nebula probably comparable.

    There's something blocking the Nebula. Bad antenna? Not likely as that wouldn't delay server discovery but only download speed.

    Any ideas?
  • Zyxel_Bella
    Zyxel_Bella Posts: 558  Zyxel Employee
    Zyxel Certified Network Engineer Level 2 - Switch Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch 50 Answers

    Hi @Bigtroll001

     

    Noted, thanks for the information.

    The symptom shows the bottleneck is from NR5101 gateway to the internet even settings changed, then we’ll need to collect debug logs on NR5101 to investigate. Could you provide your Org/Site name for us and enable the Zyxel support at Help > Support request > Invite Zyxel support as administrator, save the changes for us to check?

    Thank you

     

    Regards,

    Bella

     

    zyxel.com | Facebook | LinkedIn | YouTube

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