Airport extreme wifi make troubles to NetGearDGN2200v4 wifi

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Airport extreme wifi make troubles to NetGearDGN2200v4 wifi

Hi all!

I've an Airport Extreme (2nd gen) connected by ethernet to my gigabit switch and configured as access point, as router and second wifi I use a NetGear DGN2200v4, both wifi have different SSID and channel but same key and WPA2, when both are on I've a strange trouble in the NetGear, it looks like that the "isolation wifi" is active, I can't see my lan services and I can't scan whole lan, I can reach only other computer or mobile connected to the netgear wifi, but if I turn off Airport extreme wifi, and reboot netgear, I can use my netgear wifi without troubles... I tried to change "State" under wireless option but nothing.

Any idea to fix that trouble?

AirPort Extreme 2nd Generation

Posted on Jul 8, 2015 5:45 PM

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Answer 1

Jul 8, 2015 5:59 PM in response to RedFoxy

I am not 100% sure what is happening but the path to a solution is to reduce the network complexity.

Plug the Extreme directly into the DGN2200 .. and then connect one computer or device via wireless to the Extreme and one to the DGN2200N..

Make sure both clients end up with IP addresses in the table in the DGN2200.. since that is the only router.. then ping the client on the other network..

If ping works then also see if you can pass files or whatever it is you normally do between clients.

Tell me if it works or not..

Give me some screenshots of the setup of both the DGN2200 and the Extreme so I can see how it is configured.

I should be able to suggest some more tests from there.

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Answer 2

RedFoxy Author

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Jul 9, 2015 5:14 AM in response to LaPastenague

Hi!

Thank's for reply but I've already done that test.

All computer or iPhone/iPad/Android connected by ethernet or by AirPort Extreme's wifi can scan and use all LAN computer and services, as my NAS Synology and its DLNA and SSH services, if I try to connect my iPhone to the NetGear's wifi I can't scan whole lan and connect to the DLNA and SSH services, I can see only devices connected to the NetGear's wifi.

After long test I discover that if I turn off AirPort's Wifi and turn on my NetGear's router, all device connected by NetGear's wifi can scan and use LAN services as the DLNA and SSH Synology's services, but if I turn on AirPort's wifi the NetGear WiFi switch to isolate and I can't use my LAN services when I'm connected by NetGear's wifi, my netgear's wifi works again only when I turn off Airport's wifi and reboot netgear's router.

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Answer 3

Jul 10, 2015 12:21 AM in response to RedFoxy

Can you ping the IP??

Can you ping by name?

Have you set the airport to use the correct domain name?? You will find this near impossible now in v6 utility.. it is possible only in v5.

If you cannot ping at all the routing is shot.

If you can ping by IP but not by name, dns has failed.

Yosemite is a big problem.. dns in it is a failure..

If pings work, then it can be blocked due to poor connections.

Some protocols will not be recognised by apple.. eg DLNA because Apple won't use it.

Make sure in bridge you do not use the WAN port.. connect only by LAN.

But I do need the screenshots to help more.

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Answer 4

RedFoxy Author

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Jul 10, 2015 3:04 AM in response to LaPastenague

> Can you ping the IP??

From Airport's WiFi: Yes

From NetGear's Wifi when Airport's wifi is shutdown: Yes

From NetGear's Wifi when Airport's wifi is active: NO

From ethernet: Yes

> Can you ping by name?

From Airport's WiFi: Yes

From NetGear's Wifi when Airport's wifi is shutdown: Yes

From NetGear's Wifi when Airport's wifi is active: NO

From ethernet: Yes

> Have you set the airport to use the correct domain name?? You will find this near impossible now in v6 utility.. it is possible only in v5.

Yes

> Yosemite is a big problem.. dns in it is a failure..

it isn't an os trouble, I tried with Windows 7/8.1, iOS 8.x, OSx Yosemite 10.10.x, FreeBSD 10 and Xbox One and 360 😀

When Airport's Wifi is active NetGear's Wifi isolate lan services from wifi network

> Make sure in bridge you do not use the WAN port.. connect only by LAN.

Already done, I use LAN port on both device

> But I do need the screenshots to help more.

If you need something, just ask and I'll give it to you! ^^

Thank's for support

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Answer 5

Jul 10, 2015 1:54 PM in response to RedFoxy

If you need something, just ask and I'll give it to you! ^^

Give me the shots from the airport utility so I can see exactly how the AE is setup.

So the summary page.

Click edit and give me the internet tab, wireless tab and network tab.

eg.. wireless tab.

I would then be interested in what happens when you try static IP instead of using bridge in the AE.

The setup is like this.

https://discussions.apple.com/thread/5981989?answerId=25135547022#25135547022&ac_cid=tw123456#

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Answer 6

RedFoxy Author

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Jul 10, 2015 2:31 PM in response to LaPastenague

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Answer 7

Jul 10, 2015 2:38 PM in response to RedFoxy

OK.. that is much better..

You have a couple of issues.. the internet tab should be set to dhcp.. do not use static IP.

As long as you use bridge on the network tab the internet tab must use dhcp. The reason is because the Netgear must provide its IP to land it in the ARP table.

If you want to use static IP in the AE, then you should use 192.168.1.1 for first DNS. You should then set the AE to dhcp on the network tab.. and give it a range of addresses not used by the Netgear..

You are trying to do both things and you cannot do it.

If you want the AE to have a static IP use dhcp reservation in the Netgear.

Also please do not use Apple names.. use all short names no spaces pure alphanumeric.. remember the Netgear is old fashioned Windows SMB type product.. and names like Redfoxy's Airport Extreme are illegal.

Please use passwords also that match the above. so for example.. RedAE is fine. AEgen2 is fine. Your present name is not fine.

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Answer 8

RedFoxy Author

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Jul 10, 2015 2:50 PM in response to LaPastenague

hemm NetGear's DHJCP service is disabled, my synology's nas is the DHCP server, main gateway is the NetGear and DNS server are the google one.

Mi network is:

192.168.1.1 NetGear Router (only router, wifi and nat services)

192.168.1.2 AirPort Extreme (Only Wifi service)

DHCP lease: 192.168.1.3 -> 192.168.1.19

192.168.1.20 iMac ethernet Static IP

192.168.1.21 iMac WiFi Static IP

192.168.1.38 Xbox One WiFi

192.168.1.39 Xbox One ethernet

192.168.1.40 Xbox 360 ethernet

192.168.1.41 iPhone 5S

192.168.1.43 iPad Air

192.168.1.45 TV Sony Bravia

192.168.1.47 iPad 1

192.168.1.48 iPad 3

192.168.1.50 -> 62 Parallels virtual machines

192.168.1.250 DVR security cam

192.168.1.252 Samsung network printer

192.168.1.254 Nas Synology DS411slim, DHCP server, DLNA, SMB and SSH server

No one use the AirPort Extreme or NetGear DNS or DHCP server (disabled on both) than I don't think that I need to change from static to DHCP in my AE or change the DNS on my AE, or must I do it?

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Answer 9

RedFoxy Author

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Jul 10, 2015 2:57 PM in response to RedFoxy

by the way, just I updated my AE network ip, now is DHCP and ip address reserved in my synology's dhcp service, any other suggest?

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Answer 10

Jul 10, 2015 5:21 PM in response to RedFoxy

Ok.. you keep revealing new bits and pieces..

When you have one router handling NAT.. and Synology handling DHCP .. sorry this is asking for trouble.

The DHCP server should be moved back to the Netgear..

And in fact I would like to see you reduce the complexity of the network.. because therein you are running into trouble.

You need some local DNS to handle which device is which.. and it makes it really messy with your setup. Google DNS cannot sort out the names of local clients and local IP addresses.. that has to be handled by the local router.. and Synology is not the place to do it.

Having static IP on the devices is also not as good as using dhcp reservations.. for a simple reason that DHCP is now essential in the router to handle arp table.

As a test.. why don't you bridge the Netgear assuming you have DSL internet service.. plug in the airport and use PPPOE from there.. and use the airport as the one and only router in the network..

I am not at all surprised now to hear you are having issues.. because the gateway is not the dhcp server. The ARP table is not in any fixed location.. and I really doubt synology build their NAS as DHCP servers.

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Answer 11

RedFoxy Author

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Jul 11, 2015 3:38 PM in response to LaPastenague

The gateway was the dhcp server but when I starts to looking for the trouble I was't happy to loose my reservations every time I restore my router, and an external DHCP server is useful if you need to restart your router or you must shutdown it when the weather is a risk for lightnings.

About static ip and reservation, why are they a bad choice? I need to know every ip about my virtual machines and local server (as my iMac, Nas, Printer), than I keep my other devices with reservations just to keep my lan under control or to use specific port redirections (like xbox need some specific ports).

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Answer 12

Jul 12, 2015 1:04 AM in response to RedFoxy

Sorry to not have answered for a while.. as usual this site has failed to display more recent posts.

The issue is, with NAT it must track every IP in the network.. its local ARP table is usually linked to DHCP table.

If you want to offload the DHCP duties from the Netgear you should offload its NAT as well..

BUT the synology is not the right place to be doing NAT.. I am not sure if it even supports it.

Does your ISP support PPPOE?? If so then simply bridge the DGN2200 and use PPPOE in the airport.. do all the dhcp and dhcp reservations and NAT in the one place and I am pretty sure the problems will stop.

If this is not a possible setup then using dhcp and dhcp reservations on the airport is possible using static IP setup.. see here.

https://discussions.apple.com/thread/5981989?answerId=25135547022#25135547022&ac_cid=tw123456#

While this may not look that different to what you are doing .. the advantage is you keep dhcp and arp working in the netgear and share the dhcp with the airport.. which can then maintain the reservations for you. This is effective because it is not routed.. it is still bridge setup.. but it keeps the domain set to airport..

I would also like you to change the domain in the Netgear if that is possible to local which is the default used by the airport.

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Answer 13

RedFoxy Author

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Jul 12, 2015 5:55 AM in response to LaPastenague

Ok, I understand, now I moved DHCP server on netgear, than I release all devices and configured all static ips using netgear as primary dns and gateway, there are NO reservation now only static and dhcp.

This is my iPad BEFORE I activate AirPort Extreme's Wifi:

Than I activate AirPort's wifi and it reboots, following picture was taken from my iPad connected to the AE's Wifi:

Than I connect my iPad back to NetGear's WiFi and:

As you can see, DHCP server and DNS are not influencing that trouble, now I'm changing AE and NG settings to use NG as DSL modem in PPPoE and AE as gateway and DHCP server, but I don't like that solution because AE isn't under UPS.

Stay tuned for update

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Answer 14

RedFoxy Author

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Jul 12, 2015 9:02 AM in response to RedFoxy

Just I do to change dhcp and nat from NG to AE:

1) I change NG IP from 192.168.1.1 to 192.168.1.2 and mode from router to modem pppoe

2) tried to connect by pppoe using my iMac and it goes

3) factory reset for the AE

4) configuring AE to PPPoE, DHCP, Nat and WiFi

5) try the connections and it goes

6) tries to do a lan scan by AE -> I see all

7) unable to do a lan scan from the NetGear because it's in a different lan because it's in the wan of the AE and it act like a modem

Before I buy the NetGear my connection was always using AE as gateway and an old Alcatel One Touch Home as modem.

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Answer 15

Jul 12, 2015 1:47 PM in response to RedFoxy

I am not following you very well.. and I don't really follow what the issue is now.

When you change a network around.. you MUST shut down everything and restart it.

In bridge the modem IP is irrelevant.. I don't understand why you are changing it.. leave it at default.. ie 192.168.1.1 is fine.

The rest of the network can also use the 192.168.1.1 via the apple airport.. if you don't want to change it back to native IP. ie 10.0.1.1

A bridged modem is off the network.. it is a dumb converter of ethernet to ATM packet system for network.. all transfers from WAN of Airport to LAN of the DGN2200 are PPPOE.. and are not based on IP addressing. The first IP address in the network is the WAN address of the airport which picks up the address from the public IP from ISP via pppoe authentication.

Then NAT and DHCP happen from the airport and all clients get IP from there..

You cannot really use the wireless from the Netgear so shut it off.

If that doesn't work out, then move all the routing back to the Netgear.. and use the Airport in as bridge or static IP as mentioned.

Before I buy the NetGear my connection was always using AE as gateway and an old Alcatel One Touch Home as modem.

This is the correct setup.. did it give you problems??

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