Case Study - Small Business Network

**Mei-Xiu** · 27-08-2010

Here is a diagram of the network or the small box I work. As we find that we have problems of slowness, computer not acceding to some other ordis, I just ask you some help. Given the IP for the switch, router and ADSL modem, what are the network settings to tell Windows to access the LAN and the Internet, and access to local, not internet. When I speak of parameters I mean the IP, gateway and DNS.

I am hoping some help from your side as soon as possible.

Thank you in advance for your help.

**Spyrus** · 27-08-2010

127.0.0.1 is the local loop, so the IP of your modem is not it. As for the rest you take the same class for all the gear, either 192.168.100.x, including the router and modem, you put in 255.255.255.0 subnet mask, gateway, it must be the address of the router it seems to me to confirm the DNS and your ISP is those. I think that you should have got hint. Good luck.

**Snake08** · 27-08-2010

You can put an IP address on a switch, AC used to administer it. Then you just have to configure your router as a DHCP server, and other positions as a DHCP client. In the server you just have to set the DNS to the ISP and the gateway which will be the LAN IP address of the router. For problems of slowness, checks that all PCs have a good map baseT 100. That, apparently you do not have a road go into the router, but do not hesitate if you got other worries.

**Zachary** · 27-08-2010

There's just something that bothers me in the story is that your switch will have to do NAT between networks 192.168.1.x and 192.168.0.x! (Or so I have not understood the operation of a switch). Either you pass everyone 192.168.0.x (or 192.168.1.x), or you change the netmask to 255.255.0.0.
For the IP addresses of your posts, you do not break the head, using 192.168. (What you have chosen here) .2 .3 .4 .5 etc ... (But remember to specify the IP of your router in the box "gateway" of your PC).

**Shen** · 27-08-2010

There's just something that bothers me in the story is that your switch will have to do NAT between networks 192.168.1.x and 192.168.0.x! (Or maybe I did not understand the operation of a switch)

This is the router that will do NAT and PAT it'll be even in such cases (NAT is a private one for public, private PAT is No. 1 for public). By convention (nothing official in there is a use that is AC), the router or gateway, it is 192.168.0.254, and to generalize, anything that is a router, a network gateway, one starts with the most students bytes, then what is the client starts at 1.

**Mei-Xiu** · 27-08-2010

Thank you for your advice has enabled progress. But there is still a problem. A colleague who is exactly the same network settings as me (except the IP of course), I can not see in Network Neighborhood. But I come to a ping, but when I do a net view his ip it tells me he does not share the document when in fact he shares, you have an idea of the source of the mistake?

If anything, it works only if I put an ip 192.168.0.xxx type if I put an ip 192.168.100.xxx type I have access to the Net. Should it change the subnet mask.

**Jackson2** · 27-08-2010

You're well dressed 192.168.100.x everywhere, not only operate on your machine? The problem has to be situated at the gateway. If they put this little world on the same IP class already works better. So for every PC, switch IP 192.168.0.x mask 255.255.255.0 and gateway 192.168.0.1 (the router's) and nothing else. Otherwise with the switch manageable ago possibility of VLANs (virtual network) and if by chance it is set up only those of the same VLAN can be.