Bad mask for IP 192.168.0.0 Cisco Packet Tracer

cisco netmask mask

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Simple answer is 192.168.0.0 is not a valid ip address to use. It is a network Address. Please change your Ip address between 192.168.0.1-192.168.0.254. Then It will be solved.

Network address is explained by techopedia as follows

A network address is any logical or physical address that uniquely distinguishes a network node or device over a computer or telecommunications network. It is a numeric/symbolic number or address that is assigned to any device that seeks access to or is part of a network.

Host address is

The physical address of a computer in a network. Host address is the IP address of the machine.

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IntoTheDeep

Design and back-end development are essential for the web, but the exciting area where they meet is front-end development. As a front-end developer, I get to take a design – something that’s beautiful but static – and turn it into an interface, where its components become tools for unique experiences on the web.

Updated on September 18, 2022

Comments

IntoTheDeep over 1 year
I have to do next task: connect three LAN networks with Cisco packet tracer. I have to use net addresses 192.168.0.0/24; 192.168.10.0/24; 192.168.20.0/24. When I am trying to set router address 192.168.0.0 and mask 255.255.255.0 I have error message for bad mask. How to solve that issue? My code:
```
Router>
Router>enable
Router#conf t
Router(config)#int fa 0/0
Router(config-if)#ip add 192.168.0.0 255.255.255.0
Bad mask /24 for address 192.168.0.0         
```
IntoTheDeep almost 5 years

But why I have that instructions in my task?
serverAdmin123 almost 5 years

It says use it as anetwork address. Not a host address
IntoTheDeep almost 5 years

Where I need to set those addresses?
serverAdmin123 almost 5 years

It will refer your ip address range. That's all. 192.168.0.0/24 mean you are able to use 254 address for your host. Generally first address is network address and last one will be Broadcast address.
serverAdmin123 almost 5 years

networkengineering.stackexchange.com/questions/7106/…
IntoTheDeep almost 5 years

So I need to use host addresses from 192.168.0.1 to 192.168.0.255?
serverAdmin123 almost 5 years

yes. You need to use as i explained. Especially You need to learn more about Subnet Masking