2801 router to internet connection

[fran19422]

Hello, I want to set up my LAN to have internet access via my 2801 router.

The 2801 router is connected to my home ADSL router.

Just to confirm the procedure. Do I:

- assign a static IP to the 2801 interface which connects to the ADSL router

- confgure the LAN PC's with that interface IP as their default gateway.

- configure NAT on the 2801

Now do I just configure a 0.0.0.0 'gateway of last resort' on the 2801 router pointing to the interface leading to the ADSL router ?

Therefore, all traffic from my PCs that is internet bound will head out to the ADSL router and onto the internet.

Thanks for confirmation. First time I have done this.

[Abzal]

Hi,

It should be like that:

For example, your static IP 1.1.1.1, ISP's 1.1.1.2, your LAN 192.168.0.0/24

int dialer 0

ip add 1.1.1.1 255.255.255.252

ip nat outisde

mtu 1492

int f0/0

ip add 192.168.0.1 255.255.255.0

ip nat inside

ip route 0.0.0.0 0.0.0.0 1.1.1.2

access-list 10 permit 192.168.0.0 0.0.0.255

ip nat inside source list 10 interface Dialer0 overload

Default gateway for hosts on LAN should be 192.168.0.1.

Hope it will help.

Best regards,
Abzal

[fran19422]

Sorry, I think you misunderstand.

I have an ASSL modem which is interfacing directly with the ISP. That ADSL modem is working fine.

My router (with connected LAN PCs) then connects to that ADSL modem in order to gain intenet access..

I just want to confirm that my plan (outlined above) for configuring the routers/PCs to access the internet is correct i.e. is that the conventional way of doing it ?

Thanks for confirmation.

[Abzal · Accepted solution]

Sorry for confusion:

> assign a static IP to the 2801 interface which connects to the ADSL router

Yes, correct. They should be on the same subnet.

> confgure the LAN PC's with that interface IP as their default gateway.

No.

Default gateway should be LAN side of router not ADSL side. Each router's interface is different broadcast domain meaning different subnet.

> configure NAT on the 2801

No.

If 2801 connected to ADSL with private subnet no need on NAT. ADSL should be doing it.

> Now  do I just configure a 0.0.0.0 'gateway of last resort' on the 2801  router pointing to the interface leading to the ADSL router ?

Yes, correct. But better to point IP address of ADSL instead of interface.

Network topology and IP address assignment would much help.

Hope it will help.

Best regards,
Abzal