Networking Tips&Problems

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Q:I try to setup the subnet as 192.168.109.0/22 but it doesn't work. Once I set it up as 192.168.108.0/22, it works. What is the reason?
A:First let me explain supernet. Supernet is an IP network formed from two or more networks (or subnets) with a common CIDR routing prefix.
I asked it to Cisco Meraki support. I got the following response. " We were attempting to add the incorrect subnet portion for the /22 supernet. "
HOW to setup supernet correctly?
I recommend you to check the post related binary and supernetting.
http://www.myiteducation.org/2018/03/supernetting-and-binary-system.html


Q:The internet sometimes is very slow!
A:First, you need to find the reason, problem. Then implement solutions! Implementing solutions step by step will help you to figure out the issue. (Check my post. https://goo.gl/Ag3Me2 ) My suggestions are;
  • Check it is wired/wireless device. If it is wired; check cable, switch port, computer ethernet input. If it wireless device, check the signals, AP, which SSID has the issue.
  • Don't forget it might be a basic computer issue.
  • The internet provider may have some issues. They may give low internet to the building.
  • Some users may use the internet bandwidth too much. Find the person. Or set up a limit per user for the entire network.
  • If you use Cisco Meraki or another cloud-management AP, check your event logs, clients, AP usage
  • Contact tech support.
Q: How to find IP address of a domain.
A: ping domain by using cmd account. You will see IP address of the domain.
If you try to open a website and you will see Resolving host..." at the corner like 3-4 seconds. >> It means there is an issue on DNS. TRy to put the IP address directly and see the difference.

TO make your internet connection fast...
Disable IPv6 protocol

NSLOOKUP
cmd komut satirina; nslookup google.com >>> yazarsan, dns server, default dns server oluyor. eger DNS calisiyorsa, name: google.com gelir.
cmd komut satirina; nslookup google.com 10.1.1.2 >>> yazarsan, dns server, 10.1.1.2 oluyor. yani 10.1.1.2 i DNS olarak kabul ederek calisiyor.
cmd komut satirina; nslookup 127.0.0.1 10.1.1.2 >>> yazarsan, dns server, 10.1.1.2 oluyor. VE eger DNS calisiyorsa, name: localhost yazisi cikar.


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