Configurate the 1760 Router

[ray.ng]

Hi all, I am working to config a Cisco 1760 router. Due to the router just have one ethernet interface. But I have two subnet on the network. So I config a ethernet interface as two IP address. look like as:

interface Fastethernet0/0

ip address 148.164.234.251 255.255.255.0 secondary

ip address 172.25.103.251 255.255.252.0

ip helper-address 148.164.234.152

The DHCP server is 148.164.234.152 and it have a scope to assign the IP to 172.25.103.0 network. But the client cannot get the IP on 172.25.103.0 subnet form the DHCP server after I set it up. How can I fix it on the router?

[mirco.orlandi · Accepted solution]

If you have a "good" switch on lan, use dot1q between router and switch and play with 2 vlan.

interface FastEthernet0/0

  ip address 172.25.103.251 255.255.252.0

  ip helper-address 148.164.234.152

interface FastEthernet0/0.2

  encapsulation dot1Q 2

  ip address 148.164.234.251 255.255.255.0

  ip helper-address 148.164.234.152

On switch use vlan1 as native (is default). Create vlan2 and assign ports.

Regards,

Mirco.