Configuring a 3com 4500g 24 port switch

[jimbush]

First!

Thanks for your time.

I have three, 3com 4500g switches tied together. (24port)

I just installed a T1 line and got it working on a cisco router - first time for this

The ATT tech told me that my FastEthernet ip address 12.235.xx.xx would need to be translated
at my switch.

Before it was a private 192.168.1.xx.

So how do I configure the 3com switch to take the output
address from the router and make it so my local network will work.
This address would be the gateway for my PC's.

I don't even know how to explain this very well - I hope someone knows what I mean.

The ATT guy says all T1 lines have to work this way.

Can you please advice me on how this might be done - in layman terms of course!

P.S. The ATT guy said to use "ip address translation"

Oh what does that mean

Thanks,

Jim

 

[network3r]

Do you use NAT on the Cisco?

Mirko

http://www.nwlab.net

 

[jimbush]

Dear Networkr3,

Below is the config file in my router taht ATT say is working.

I used a sample that I got from cisco to build the config.
The last line does seem to include nat.

I hope that answers your question.

Thanks,
Jim

interface FastEthernet0/0
ip address xxx.xxx.x.xxx 255.255.255.0
no ip redirects
no ip proxy-arp
no ip unreachables
no ip mroute-cache
ip nat inside
speed auto
duplex auto
no cdp enable
no shutdown
!
interface Serial0/0/0
ip address 12.xx.xxx.xxx 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
no ip mroute-cache
ip nat outside
encapsulation ppp
service-module t1 clock source line
service-module t1 framing esf
service-module t1 linecode b8zs
service-module t1 timeslots 1-24 speed 64
bandwidth 1536
no shutdown

access-list 101 permit ip 192.168.1.0 0.0.0.255 any

ip nat inside source list 101 interface Serial0/0/0 overload