Interaction wired <-> wireless

[AlexanderW77]

Hi,

on my RT-AC68U I'm currently using firmware 380.68_4 and I'm experiencing some problems with my wireless stuff.

My router is configured in wireless router mode and wireless is set to not isolated.
Problem I'm facing for quite some time now is that for some reason connections form wired to wireless or between wireless are not possible anymore.

For example, I have two raspberry pi's, after turning them on initially I can connect to them wireless but then after while it is not working anymore. Reaching them throiugh the internet (port forwarding) is still possible and when in this case I ping my wired host it takes some time afeterwards ping times are ok and wired to wireless is working again also.
Another example is a wireless connected laptop that wants to print to a wireless printer. Sometinmes is works, siometimes not, printer ca not even be pinged fromthe laptopn but can be pinged from the router, the laptop can also be pinged from the router.
Last example, one raspberrypi used as surveillance camera stores data on an nfs export at the router, works nicely and is reliable, but also the pi all of a sudden can not be reached from a wired host anymore , while at the same time the pi still keeps storing data on the nfs share.

In all cases a reboot of the router solves the problems for a few hours to a few days.

What's going on here and most important, how do I solve this?

 

[Trikein]

The fact that you said your router is in router mode, makes me think something is NOT in router mode, as in bridged. Do you have a bridged gateway? If so, is the wireless disabled on that? If not, what model modem do you have and how is your network configured? When the PC can't ping the printer, can it ping the IP for the router the printer is connected to?

 

[Vexira]

it sounds like a a bug as if wireless isolation is on, test a factory reset, also check the pc firewalls to make sure.

 

[AlexanderW77]

In front of the router, on the WAN port is a Cisco EPC3925 This one has disabled wireless except for provider supplied hotspot with different SSID. My router is connected to the modem with an ethernet cable and is configured with fixed WAN ip (192.168.1.2). On modem that IP is in the DMZ. Router is setup with both wired and wireless clients using an unique SSID, IP range 192.168.2.*

When the PC can't ping the printer the PC is able to ping the router and the router is able to ping both PC and printer.

Syptoms indeed look like wireless isolation but more like a wireless+ isolation while also communication from wired to wireless is affected and not only wireless to wireless.
I tried a factory reset already but this did not solve the problem. Only way to solve it currently is either rebooting the router or initiate a ping from the wireless device to the wired device but this not possible with the printer. For all other wireless devices first ping packets do not arrive are arrive slow (>300 ms) while subsequent are normal (3-4 ms). All wireless affected use 2.4 GHz

 

[Vexira]

is it possible to put the modem into, bridge mode or modem only mode which disables the routing functions of the provider modem?

 

[AlexanderW77]

Just looked into the modem settings but could not find a setting there to put it in bridge or modem only mode. I think provider specific firmware is used.
Any difference to expect? Thought DMZ would provide the same.....

 

[Trikein]

ISP gateways in bridge mode are notorious for being flakey. The Cisco EPC3925 is a EuroDOCSIS 3.0 phone/internet wireless gateway. Who is the ISP? I am not sure how it works for non US ISP's but in the US you can either buy or rent a separate phone modem from your internet modem. Even if your ISP doesn't allow that, it should atleast be possible to use a non wireless phone/internet modem like the Cisco EPC3212 or the Arris TM822. Before you buy anything, it would be smart to check exactly which models they accept. Most ISP have support articles you can find by googling "<ISP> support compatible modems". Or just post who your ISP is and I can dig around. My guess is UPC?

 

[AlexanderW77]

Almost, its Ziggo (NL) and from their website I conclude they don't support/allow user supplied modems.

Maybe interesting, on the manual page I found that for connecting a router behind the modem I should not set the wan ip of the router to a fixed ip in the modem DHCP range but instead I should have fixed the IP of the router in moden DHCP, small difference.
I did change this and chose the same ip as before, to my surprise the Cisco didn't allow it as the fixed ip chosen (192.168.1.2) was not in the DHCP range (192.168.1.10 and up. Changed the range and then it was accepted by the modem.

This triggered me for DHCP as in the router I've defined for each device a fixed ip and these IP are not in the DHCP range. Fixed IPs are between 192.168.2.20 and 192.168.2.50 and DHCP range is 192.168.2.101 - 192.168.2.199. Changed the DHCP range on the router now, perhaps this was my issue??

 

[Trikein]

Yea, I'm not sure what you mean when you say "fixed IP's". In bridge mode, the ISP gateway should only be giving out 1 IP, and that's a public IP (NOT 192.x.x.x) to the Asus router. According to their website, if your default Wireless SSID starts with Ziggo, you have to call Ziggo to ask them to put the gateway into bridge mode. If your SSID starts with UPC for some reason, then try these instructions.

Open een browser en ga naar het volgende adres: 192.168.1.1. Laat de gebruikersnaam en wachtwoord leeg. Klik daarna op Log in.

b.
Klik bovenin op Administration.

c.
Kies bij Working Mode voor Bridged Only. Klik vervolgens onderaan de pagina op Save Settings.

 

[Vexira]

Just looked into the modem settings but could not find a setting there to put it in bridge or modem only mode. I think provider specific firmware is used.
Any difference to expect? Thought DMZ would provide the same.....

bridge mode pushes all the router functions to the router prevents a double nat that can eb caused by the isp modem, also get a non isp modem and mac clone the isp unit, that what I do my provider is a pain like that.

 

[Vexira]

ISP gateways in bridge mode are notorious for being flakey. The Cisco EPC3925 is a EuroDOCSIS 3.0 phone/internet wireless gateway. Who is the ISP? I am not sure how it works for non US ISP's but in the US you can either buy or rent a separate phone modem from your internet modem. Even if your ISP doesn't allow that, it should atleast be possible to use a non wireless phone/internet modem like the Cisco EPC3212 or the Arris TM822. Before you buy anything, it would be smart to check exactly which models they accept. Most ISP have support articles you can find by googling "<ISP> support compatible modems". Or just post who your ISP is and I can dig around. My guess is UPC?

mac cloning should help, my isp here in Australia, Optus has horrid vdsl2/adsl modems, so I'm using a third party unit but since they don't like it, I had to mac clone the isp unit to get voip working on my ata, only way for it to register.