Some things that are often overlooked when it comes to troubleshooting a network.
Things to do beforehand:
1.Make sure documentation is up to date. At the very least you should have some sort of change management software which is easy to use. When you make a change, fix a problem, or whatever take the extra minute to update [...]
Good article on router troubleshooting.
Home Lab – crashed router troubleshooting « [...]
One of the things I have to explain to clients on a regular basis is the difference between signal strength and quality of that signal. It is possible to have a good signal strength but poor quality. Think of receiving a wireless signal as a person with a megaphone at the opposite end of a football [...]
After doing some troubleshooting for a client I figured I would post some links for others here. Most of you can find this with a simple google search but I felt the need to [...]
show version:gives uptime, info about your software and hardware and a few other details.
show ip interface brief
show interface:
show ip interface:
show ip route:
show arp:
show running-config:
show port:
show [...]
Router# show interface serial0
Serial is up line protocol is up, it is the first message that shows us that your serial port is configure properly. It is just possible when you have already given IP address, run no shutdown and configures some other command.
There are some possible errors messages may occur [...]
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