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Level 1

66 points

DHCP/NAT to wired clients not working.

Yesterday my wired clients lost their DHCP assignments from my AirPort Extreme (802.11ac) router and I can't figure out why that happened. This includes recent model iMac, a TiVo Roamio, an HP laser printer and a Drobo 5N. All of them have DHCP reservations by MAC address. All of them are connected with known good cables. All my wireless clients are fetching IPs via DHCP just fine, it's just the wired ones. In addition I have a second AirPort Extreme to extend the network. The wired clients connected to that one are working just fine.

I tried swapping the two AirPort Extreme routers to see if it was a hardware failure, but both exhibited the same problem when I restored my saved settings. I'm just wondering what's causing it now when I've been running the same basic router configuration for years, going back multiple versions of AirPort Extreme router hardware.

If I had to guess, I'd assume there is some kind of DHCPv6 weirdness affecting the physical LAN ports.

Has anybody encountered a similar problem and know a solution?

Airport Extreme 802.11ac, OS X Mavericks (10.9.5)

Posted on Oct 8, 2014 1:00 AM

37 replies

Loner T

Level 9

59,471 points

Jul 17, 2015 3:36 PM in response to LaPastenague

On this thread, or another?

Loner T

Level 9

59,471 points

Jul 17, 2015 3:38 PM in response to LaPastenague

I had the same issue about 2+ hours ago. Must be a glitch on the Apple servers. I could see them in Activity, but not on the specific discussion forum, which is usually the other way round.

Jul 17, 2015 5:07 PM in response to Loner T

It hasn't happened for a few months after the last big revision.. and mess up to the site.. but it is back with a vengeance now.. I am failing to see posts on every third thread now.. no rhyme or reason for it either. Some things show 0 replies.. and there are stacks..

I have given up complaining about it.. i just post again in activity and then I will see it again.. then I have to figure out what to say..

Loner T

Level 9

59,471 points

Jul 17, 2015 5:14 PM in response to LaPastenague

It is painful for users looking for help as well, when responses are not commensurate with questions. I usually walk away for a few hours. This, on a weekend, is not good for users and responders, alike.

AK_Dave

Level 1

0 points

Jul 18, 2015 7:35 AM in response to Loner T

The **** problem is "fixed" - after an extended power off of the router, modem, and switch... My wired clients can connect again. Even the clients that were never in the switch. Im going to start looking at going back to other router products that give me finer control

Loner T

Level 9

59,471 points

Jul 18, 2015 8:45 AM in response to AK_Dave

At least you have a working network now till the next failure. 😎

coopbmt

Level 1

4 points

Nov 19, 2016 7:31 PM in response to AK_Dave

I was having the same problem and found this thread after Googling. For future reference, a 10 minute power off of my APE, switch, and modem, seems to have fixed the problem with Ethernet connections and DCHP, at least for now.

DHCP/NAT to wired clients not working.