Modem - Router Problem

[Roger]

I have a LAN behind an ADSL Modem and a Router. Throught the modem alone
the internet works. With the modem AND the router it doesn't work. Does
someone know why?

Here are the details:

ADSL Modem
----------
Zyxel Prestige 623 ME
User Name <number>@adslplus.ch
Password *********
Lan Setup
DHCP
DHCP Server
Client IP Pool Starting Address 192.168.1.2
Size of Client IP Pool 4
Primary DNS Server 0.0.0.0
Secondary DNS Server 0.0.0.0
Remote DHCP Server N/A

TCP/IP
IP Address 192.168.1.1
IP Subnet Mask 255.255.255.248

Router
------
Zyxel Prestige 814 Plus
LAN Setup
DHCP Setup
DHCP Server (checked)
IP Pool Starting Address 192.168.1.33
Pool Size 32
Primary DNS Server 0.0.0.0
Secondary DNS Server 0.0.0.0
LAN TCP/IP
IP Address 192.168.1.2
IP Subnet Mask 255.255.255.0

WAN-Setup
ISP
Encapsulation PPPoE
Service Name <blank>
User Name <number>@adslplus.ch
Password *********
IP
WAN Adress IP Assignment: Get automatically from ISP (Default)
(checked)

Thanks in advance!

Roger

 

[Nepatsfan]

It looks as if both your modem and your router are trying to run
the DHCP service on your network. You only need one. If you want
to keep both pieces of hardware in place, I suggest you turn of
the DHCP features on the router (effectively turning it into a
switch/hub). If all the PC's on your LAN can connect to the
modem, then you don't really need the router.

Nepatsfan

 

[Chuck]

I have a LAN behind an ADSL Modem and a Router. Throught the modem alone
the internet works. With the modem AND the router it doesn't work. Does
someone know why?

Here are the details:

ADSL Modem
----------
Zyxel Prestige 623 ME
User Name <number>@adslplus.ch
Password *********
Lan Setup
DHCP
DHCP Server
Client IP Pool Starting Address 192.168.1.2
Size of Client IP Pool 4
Primary DNS Server 0.0.0.0
Secondary DNS Server 0.0.0.0
Remote DHCP Server N/A

TCP/IP
IP Address 192.168.1.1
IP Subnet Mask 255.255.255.248

Router
------
Zyxel Prestige 814 Plus
LAN Setup
DHCP Setup
DHCP Server (checked)
IP Pool Starting Address 192.168.1.33
Pool Size 32
Primary DNS Server 0.0.0.0
Secondary DNS Server 0.0.0.0
LAN TCP/IP
IP Address 192.168.1.2
IP Subnet Mask 255.255.255.0

WAN-Setup
ISP
Encapsulation PPPoE
Service Name <blank>
User Name <number>@adslplus.ch
Password *********
IP
WAN Adress IP Assignment: Get automatically from ISP (Default)
(checked)

Thanks in advance!

Roger

Roger,

The Prestige 623 is a modem / NAT router combo. Why do you need to use another
router too?

 

[Nepatsfan]

After thinking this over, I'd make a change to my suggestion. If
you need to leave the router in place then turn off the DHCP
service on the modem.

Sorry for the confusion.

Nepatsfan