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Author Topic: [1.20] DHCP assigns an IP not even in the same class... WTF???  (Read 426 times)

FurryNutz

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #15 on: November 28, 2017, 10:52:54 AM »

Please phone this in and talk to support. I'm sure they can help you. I would ask for escalated support.

The WRT is a temporary solution I would try since this may take longer to fully identify your problem and if it's deemed a FW issue, it would take some time to get it fixed and possible sent to you. So thats why I suggested trying WRT in mean time. However I would wait until you get in contact with D-Link support on the phone as soon as you can.

I've asked D-Link to review this thread.

The WRT FAQ I wrote up yesterday is step by step and if followed, will result in getting the router loaded correctly with WRT and not bricking the router. I didn't brick my 890L.  ::)

It would be helpful to let us know what your network topology is like as well. Help us with figuring out whats wrong. More info we have the better.
« Last Edit: November 28, 2017, 10:56:55 AM by FurryNutz »
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Cable:200mb/10Mb>Motorola MB7420>COVR3902>HP 24pt Gb Switch. 3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,865L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L and 960L.
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Gattsu

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #16 on: November 28, 2017, 11:15:28 AM »

So is the issue replicated on wireless only?

Okay, if you are able to replicate the issue and still connected to the SSID, quickly apply a static IP and ping the router.
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heartsofwar

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #17 on: November 28, 2017, 12:29:38 PM »

Easier said than done... I work from home and as discussed with your support via email in the past with other issues, I work under very strict NDAs that prohibit me divulging most of the information you request.

So is the issue replicated on wireless only?

Okay, if you are able to replicate the issue and still connected to the SSID, quickly apply a static IP and ping the router.


Depends on what issue you are referring to? The IPv6 addressing issue (ignoring all IPv4 addressing) was network wide and included mostly wireless but also some wired devices, about 20 devices in total. The IPv4 Class B being assigned instead of a Class C IPv4 has been wireless thus far for two separate devices; however, these issues have only happened a total of three times in the span of 5-6 months. Its not easy to reproduce.

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Gattsu

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #18 on: November 28, 2017, 01:18:07 PM »

It sounds like the DHCP server is failing to respond on the DIR-895L, after a while. Since this is a new issue with this model, I will need to test this in our lab for replication.

Test Setup:
modem <----------->(WAN) DIR-895L (LAN) <---------------> DGS-1210-28 <------------> 30+ Clients via Wireless/Wired.

The DIR-895's  configuration will be default and with internet access. All devices will be powered on 24/7.

This may take a while, if it only happens "three times in the span of 5-6 months".

If you have anything to add to increase the chance of replication, please let me know.
« Last Edit: November 28, 2017, 01:41:25 PM by FurryNutz »
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FurryNutz

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #19 on: November 28, 2017, 01:32:15 PM »

DIR-1210?  ???
DGS? 

It sounds like the DHCP server is failing to respond on the DIR-895L, after a while. Since this is a new issue with this model, I will need to test this in our lab for replication.

Test Setup:
modem <----------->(WAN) DIR-895L (LAN) <---------------> DIR-1210-28 <------------> 30+ Clients via Wireless/Wired.



@haearsofwar
Curious, what Mfr and model router did you have before the 895L? Do you still have this router?
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Cable:200mb/10Mb>Motorola MB7420>COVR3902>HP 24pt Gb Switch. 3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,865L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L and 960L.
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Gattsu

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #20 on: November 28, 2017, 01:39:48 PM »

FurryNutz, yes it will be a DGS-1210-28, not a DIR-1210...
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FurryNutz

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #21 on: November 28, 2017, 01:41:50 PM »

 ;)
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Cable:200mb/10Mb>Motorola MB7420>COVR3902>HP 24pt Gb Switch. 3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,865L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L and 960L.
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heartsofwar

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #22 on: November 28, 2017, 01:59:53 PM »

I do still have the older router (Linksys on DD-WRT); however, I have work related functions that require testing via 5 GHZ band and my old router does not have it. For this reason alone I can not simply switch back...

My router is set to reset itself once a week and I have the DHCP limited to 30 clients max with there being a total of 20-ish devices active at any one time. About 7-8 of the devices are specific to 5GHZ and the others bounce between. There is a VPN configuration that is active via the router and a ddns config. No idea if any of that is causing issues with DHCP, but thats about as much info as I can provide...
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FurryNutz

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #23 on: November 28, 2017, 02:07:35 PM »

Can you set the DHCP server to default values instead of limiting the pool and test? 192.168.0.100 thru .200

After testing and when you get time and as a suggestion, You can bring out your old router and set it up as the main host router, then turn OFF all wireless as well. Then connect the 895L up in AP mode and test again in this configuration to see if problems continue:
Turning a router into an AP.

This will give you 5Ghz support while using your old router.

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Cable:200mb/10Mb>Motorola MB7420>COVR3902>HP 24pt Gb Switch. 3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,865L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L and 960L.
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heartsofwar

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #24 on: November 28, 2017, 02:19:45 PM »

I could look into raising the cap on DHCP, but I can't increase hops via an additional router by using old as DHCP and the DIR-895 as 5GHZ AP. Counter productive to work.
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FurryNutz

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #25 on: November 28, 2017, 02:35:16 PM »

Just a thought.

Let us know how it goes.
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Cable:200mb/10Mb>Motorola MB7420>COVR3902>HP 24pt Gb Switch. 3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,865L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L and 960L.
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Gattsu

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #26 on: November 29, 2017, 07:21:30 AM »

What is the lease time set for DHCP?

I do still have the older router (Linksys on DD-WRT); however, I have work related functions that require testing via 5 GHZ band and my old router does not have it. For this reason alone I can not simply switch back...

My router is set to reset itself once a week and I have the DHCP limited to 30 clients max with there being a total of 20-ish devices active at any one time. About 7-8 of the devices are specific to 5GHZ and the others bounce between. There is a VPN configuration that is active via the router and a ddns config. No idea if any of that is causing issues with DHCP, but thats about as much info as I can provide...
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heartsofwar

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Re: [1.20] DHCP assigns an IP not even in the same class... WTF???
« Reply #27 on: December 01, 2017, 02:34:02 PM »

The default
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