Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[j0hn]

In the 1st post he's setup the Zyxel LAN as 192.168.1.1 on the default interface.
That means the web interface is reachable on 192.168.1.1

It has a 2nd bridge interface which is 192.168.2.1 by default.
I've never changed the bridge interface and it has always worked.

I always setup my Zyxel LAN to 192.168.1.1
I left the Zyxel bridge as 192.168.2.1
My Asus LAN was 192.168.1.2 with its DHCP at 192.168.1.10 - 192.168.1.253

That's how probably a dozen or more users on these forums have set it up.
The OP appears to have done similar.
No idea why it isn't working but I would be tempted to factory reset both devices and start over. It shouldn't be this difficult.

[majnu]

In the 1st post he's setup the Zyxel LAN as 192.168.1.1 on the default interface.
That means the web interface is reachable on 192.168.1.1

It has a 2nd bridge interface which is 192.168.2.1 by default.
I've never changed the bridge interface and it has always worked.

I always setup my Zyxel LAN to 192.168.1.1
I left the Zyxel bridge as 192.168.2.1
My Asus LAN was 192.168.1.2 with its DHCP at 192.168.1.10 - 192.168.1.253

That's how probably a dozen or more users on these forums have set it up.
The OP appears to have done similar.
No idea why it isn't working but I would be tempted to factory reset both devices and start over. It shouldn't be this difficult.

After reset all devices (modem, router, switch, access point) I used these



After rebooting the modem however I get an IP conflict on the router which shows this:



I can only connect back to the internet after I have reboot my router.

Running tracert after rebooting router:


Which (and I may be wrong) leads me to believe is the cause of the double NAT and possibly 192.168.2.1 or 192.168.2.2 (I don't know which one) should be assigned as the gateway and the LAN IP should be 192.168.2.2 . I only wish it wasn't that difficult but I do not know why I am having issues. 

The funny thing is that after I reboot the router I can access the internet, so I don't know what it has done to resolve it as no settings in the router have changed.

 

[j0hn]

The Zyxel shouldn't be doing any NAT so there shouldn't be double NAT.

No idea why it isn't working for you as that's pretty much exactly how I set it up.

It's like the Zyxel bridge interface is causing a conflict but the router shouldn't see that unless there's a static route set.

[Uwain]

...
If you really want everything to work with your LAN IP address on 192.168.2.1 I think (and I do stand to be corrected) that you would need a subnet mask of 255.255.253.0

I dont fully understand masks but I do not think 255.255.253.0 would be a valid netmask.
In binary, this would be 11111111.11111111.11111101.00000000 - Notice in the third group of 1's there is a 0 then another 1... but I think netmasks have to be consecutive ones followed by consecutive zeroes (hence the /24 notation instead of 255.255.255.0... 24 just denotes the number of consecutive 1's).
In this instance netmask /23 (or 255.255.254.0) would cover the 192.168.0.0 - 192.168.1.255 range... so /22 (or 255.255.252.0) may achieve what you are suggesting since it covers the range 192.168.0.0 - 192.168.3.255

[Uwain]

In the 1st post he's setup the Zyxel LAN as 192.168.1.1 on the default interface.
That means the web interface is reachable on 192.168.1.1

It has a 2nd bridge interface which is 192.168.2.1 by default.
I've never changed the bridge interface and it has always worked.

I always setup my Zyxel LAN to 192.168.1.1
I left the Zyxel bridge as 192.168.2.1
My Asus LAN was 192.168.1.2 with its DHCP at 192.168.1.10 - 192.168.1.253

That's how probably a dozen or more users on these forums have set it up.
The OP appears to have done similar.
No idea why it isn't working but I would be tempted to factory reset both devices and start over. It shouldn't be this difficult.

Physical wiring/connections maybe?
How many cables do you have in your modem and what port(s) do they plug into on your router?
And which port/connection is configured in your custom bridge interface?

The instructions that are linked (https://kitz.co.uk/routers/zyxel_VMG8324-B10A_bridge.htm) look slightly flawed to me...
2. Connecting the two devices
Shows Modem-Lan4 connected to Router-WAN

but then
5. Getting line stats from the Modem when in Bridged Mode
shows Modem-Lan1 connected to 2nd Router-WAN (which implies to me that the modem is acting as a router too???)
and Modem-Lan4 now connected to 2nd Router-Lan port

and in the final section
Configure VMG8324 access from the LAN to get line stats
it is not clear to me if you require both ethernet cables to remain in place?
It goes on to configure MODEM-Lan1 as the bridge port - does this mean the Lan1 that is connected to the routers WAN port? I really dont know! I suspect it means the MODEM-Lan port that is connected to the Router-Lan... not the WAN connection? but who knows?


I just quickly tried to follow these instructions using just a single cable between Modem and Router and it did not seem possible to me. The interface on my router has absolutely no way to communicate to the custom bridge on 192.168.2.1... the routers WAN port is, for all intents and purposes connected to the internet via the modem... it has to have an external IP in order to get the internet.
I was able to fudge something together using 2 cables... but that seems silly... why duplicate cables?

My modem is on 192.168.1.1 - even in bridged mode, if I plug into any of the LAN ports it will serve up a 192.168.1.x address to any DHCP client and allow me to use the GUI.
In my router setup (router is 192.168.0.1) I have 2 interfaces on the WAN port... 1 is the default/normal PPPoE interface that receives an external IP address from my ISP and the other I just gave a static IP in the modems range (192.168.1.2). Now anything that plugs into the router (will receive a 192.168.0.x IP) can see 192.168.1.1.

And the only way I can see everything on the same subnet just working without any messing about as Jaydub seems to suggest is if you do not use the WAN port on the router - but I suspect this will then be double NATed?

As it is, if your modem is in bridged mode then your modem is not NATing - it is simply bridging!
Your problem is that you need a routing device to exist on both subnets, in order to route your requests for the GUI from one subnet to the other.
The linked instructions appear to be trying to do this subnet-routing on the modem - which seems logically to be the wrong place... I would have my router doing all of my routing... indeed, I want my modem to do nothing more than be a modem!

You can always just plugin to the modem when you need to see stats!!

[burakkucat]

I dont fully understand masks but I do not think 255.255.253.0 would be a valid netmask.

Yes, it's invalid.

[bcat ~]$ whatmask 192.168.2.1 255.255.253.0
whatmask: "255.255.253.0" is not a valid subnet mask or wildcard bit mask!
[bcat ~]$

[bcat ~]$ whatmask 192.168.2.1 255.255.254.0

------------------------------------------------
           TCP/IP NETWORK INFORMATION
------------------------------------------------
IP Entered = ..................: 192.168.2.1
CIDR = ........................: /23
Netmask = .....................: 255.255.254.0
Netmask (hex) = ...............: 0xfffffe00
Wildcard Bits = ...............: 0.0.1.255
------------------------------------------------
Network Address = .............: 192.168.2.0
Broadcast Address = ...........: 192.168.3.255
Usable IP Addresses = .........: 510
First Usable IP Address = .....: 192.168.2.1
Last Usable IP Address = ......: 192.168.3.254

[bcat ~]$


[Edited to correct a typo.]

[burakkucat]

The instructions that are linked (https://kitz.co.uk/routers/zyxel_VMG8324-B10A_bridge.htm) look slightly flawed to me...
2. Connecting the two devices
Shows Modem-Lan4 connected to Router-WAN

That is, unfortunately, just a generic image which was used. In those instructions, if there are any discrepancies between the words and the images, the words take precedence.

but then
5. Getting line stats from the Modem when in Bridged Mode
shows Modem-Lan1 connected to 2nd Router-WAN (which implies to me that the modem is acting as a router too???)
and Modem-Lan4 now connected to 2nd Router-Lan port

I have struck out the incorrect implication.

and in the final section
Configure VMG8324 access from the LAN to get line stats
it is not clear to me if you require both ethernet cables to remain in place?

Yes, both Ethernet cables should remain in-situ.

It goes on to configure MODEM-Lan1 as the bridge port - does this mean the Lan1 that is connected to the routers WAN port?

Yes, that is correct.

I suspect it means the MODEM-Lan port that is connected to the Router-Lan...

No, that is incorrect.

[majnu]

The Zyxel shouldn't be doing any NAT so there shouldn't be double NAT.

No idea why it isn't working for you as that's pretty much exactly how I set it up.

It's like the Zyxel bridge interface is causing a conflict but the router shouldn't see that unless there's a static route set.

There is a static route set in the Zyxel


Should I delete it?

[underzone]

Are you sure you have the Zyxel in bridge mode?
Factory reset the Zyxel, and put it in bridge mode like the pic shows.
You don't need to change anything else in the Zyxel now - just your ASUS.

[j0hn]

There shouldn't be any static route in the Zyxel.
You need both cables connected.
You have your bridge Ethernet port on the Zyxel to the Asus WAN port for internet access.
Then you need a LAN Ethernet port on the Zyxel to a LAN port on the Asus to access the web interface of the Zyxel.

Once you have it working correctly you can then look in to changing it to a single cable, but you need to get it working 1st.
It's a single static route on the Asus to accomplish it.

Factory reset the Zyxel and follow the guide again?

[underzone]

LAN DHCP, static routes, LAN IP addresses, firewall settings etc. are NOT used when in bridge/modem mode.

Just factory reset your Zyxel, do the above I posted to configure bridge mode, then connect & configure your ASUS device.

The telephone/DSL cable goes into the grey Zyxel DSL port. The Zyxel LAN port 1 connects to the ASUS Gigabit WAN port.
You can then use the ASUS wifi or another LAN cable to an ethernet port on the ASUS to setup internet connectivity with a PC, using your ISP settings.

[majnu]

Are you sure you have the Zyxel in bridge mode?
Factory reset the Zyxel, and put it in bridge mode like the pic shows.
You don't need to change anything else in the Zyxel now - just your ASUS.

It's exactly the same as that image.

There shouldn't be any static route in the Zyxel.
You need both cables connected.
You have your bridge Ethernet port on the Zyxel to the Asus WAN port for internet access.
Then you need a LAN Ethernet port on the Zyxel to a LAN port on the Asus to access the web interface of the Zyxel.

Once you have it working correctly you can then look in to changing it to a single cable, but you need to get it working 1st.
It's a single static route on the Asus to accomplish it.

Factory reset the Zyxel and follow the guide again?

- I did a complete reset not a reboot yesterday on all my devices (modem, router, access point and switch)
https://forum.kitz.co.uk/index.php/topic,26798.msg449621.html#msg449621
- Static DHCP has been deleted and after a modem reboot I get IP conflict on the router and cannot access the internet.
- Both ethernet cables are connected exactly as the guide shows. Modem LAN1 > Router WAN. Modem LAN4 into Router any LAN port.
- If the bridge Ethernet port on the Zyxel is LAN1 then it connects to the Asus WAN port

[majnu]

LAN DHCP, static routes, LAN IP addresses, firewall settings etc. are NOT used when in bridge/modem mode.

Just factory reset your Zyxel, do the above I posted to configure bridge mode, then connect & configure your ASUS device.

The telephone/DSL cable goes into the grey Zyxel DSL port. The blue Zyxel WAN port connects to the ASUS Gigabit WAN port.
You can then use the ASUS wifi or another LAN cable to an ethernet port on the ASUS to setup internet connectivity with a PC, using your ISP settings.

Maybe that's where I've been going wrong because the guide doesn't say that

https://kitz.co.uk/routers/images/VMG8324_rear_bridge.png

Because reseting the modem didn't work should I do firmware flash to the latest official firmware just to ensure that it is 100% at factory defaults?

[tubaman]

...
The telephone/DSL cable goes into the grey Zyxel DSL port. The blue Zyxel WAN port connects to the ASUS Gigabit WAN port.
...

Now I'm confused as I thought the WAN port was only for when you are not using the modem in the Zyxel device.
I'm pretty sure the picture in the instructions is correct.

[j0hn]

It's a few years since a used the 8924 (I switched to a 1312 that had no WAN port) but I'm absolutely positive I never used the Zyxel WAN port for bridge mode.