Cisco 1751 Bridge question

[DWHoward]

Presently have the remote office (15 pc's) connected by a
Cisco 1751 via a T1 to a Cisco 1751 at the home office (30
pc's). T1 is to a WIC-1DSU-T1 in each router. We would like
to use the same private IP range (10.0.0.0 to 10.0.0.254)at
both ends so we would have 1 network. The current config
for each interface is:

Home 1751:

interface FastEthernet0/0
ip address 10.0.0.100 255.255.255.0

interface serial0/0
ip address 10.1.0.1 255.255.0.0

Remote 1751:

interface FastEthernet0/0
ip address 10.0.2.101 255.255.255.0

interface serial0/0
ip address 10.1.0.2 255.255.0.0

The T1 is up, ENCAP is PPP. all other specs are defaults.

My question is will the "bridge cbr" allow me to assign
the 10.0.0.101 ip to the FastEthernet interface in the
remote office and to add ip helper 10.0.0.2. (home server)
Is this the way to do it? Do I need to change the serial
interface ip's too?

The Home office server(NT4.0) would then DHCP IP's to the
remote PC's after we turn off the remote server. The Home
office server will then be the only server.

I have never used bridge commands so if somebody has a
sample config it would be highly appreciated.

Thanks

DWH

 

[routerman]

Probably simplist way to do this is to disable IP routing at both ends, change 1 of the ethernet IP addresses to be in the same subnet and use transparent bridging. However bridging across the WAN is'nt very scalable, you will find as the network grows that the multicast and broadcast traffic clogs up your expensive bandwidth.

You would be far better off using WINS (NT4) running on one server to do this and either using the routers to dole out DHCP addresses at the remote end if your IOS suports it, or forward the DHCP requests using IP HELPER command.

However if you still want to try it here is a basic config.

#no ip routing
#bridge 1 protocol ieee
#int f0/0
bridge-group 1
#int s0/0
no ip address
bridge-group 1

Use SHOW BRIDGE command to display mac addresses and confirm its working.

Note that this will bridge every protocol running on the clients, so best run only one protocol. Best of luck.

 

[DWHoward]

Thanks routerman

I will try using the WINS with ip helper at the remote
router.

DWH