networking problem

[widget123]

hiya,

i've recently had the bt 500+ network broadband system installed in my small company. i have 8 computers in the office and a xerox network printer.

i have been given a router which has its own ip address and subnet.
81.150.50.6
255.255.255.248

i have also been allocated 5 fix ip addresses which run from:
81.150.50.1 - 81.150.50.5
255.255.255.248

now i've connected 5 computers to the subnet but i have 3 computers left in the office and the xerox network printer which i need to attach to the network. the bt router will not allow me to add any other ip's to the x.x.x.248 subnet.

i have managed to both ping and print from the printer using my windows 2000 machine by adding a 2nd ip/subnet
172.x.x.x
255.255.255.0

to the advanced options of the tcp-ip settings. i can also ping one of the other computers which also sits on (my old) the same subnet ie:255.255.255.0.

but i cant see any of the 3 computers on this subnet in neighbourhood networking to access the files on them. i've rung bt and they basically told me that i'd need to buy more ip addresses for the router from them - charming eh!?

i'm sure theres a way around this - and i appreciate any help,

regards,

Widget.

 

[MattWray]

Is this a Public address? It looks like one. If it is, you need to have either the router NAT, which the ISP probably won't have, or put in a NAT box between their router and your network....

Thanks,

Matt Wray
MCSE, MCSA, MCP, CCNA

http://www.sss-steel.com

http://www.total-tec.com

 

[Comstocb]

Yeah, adding to what mattwray says, you can get a linksys DSL router to put between your ISP router and all of your network devices. This will only require one public IP to be configured on the outbound side of the Linksys and you connect all of your office equipment on the inbound side of the linksys and configure them all to use the 192.168.1.x IP space. This is taking advantage of the NAT capabilities of this Linksys to connect more devices to the network than the limited public IP's you have to use. The Linksys only has 4 ports so you would need to get an additional 8 port 10/100 switch to meet your needs. 200 bucks or so. Or you can just purchase the additional public IP's required and simplify things.

Brian

 

[widget123]

thanyou very much matt and brian,

i will take a look at both your answers and see what hardware i need to purchase.

many thanks for taking the time to respond,

George.