1 of 3 Xboxes unable to connect

I have 3 xboxes on my network that were working up until the update. Now 1 of them, the newest one (White Skylanders bundle) won't connect to Xbox Live. My network is as follows

xbox1-----\

\

xbox2--------------------------Switch----------------Router----------------Modem

/

xbox3-----/

Please see below for error info:

What Country/State/Province do you live in?

Modem brand & model number: Motorola Wimax

Router brand & model number: TL-WDR4300

If Wireless, are you using a white or black external adapter, or an internal (Xbox 360S) adapter? Wired/Internal Wireless

Things you have tried: Reset everything on network, direct to router, direct to modem, nat on & off, Forwarding on & off, router DMZ on & off, modem DMZ on & off, new cable, different port on router & switch, hard reset on modem &
router

Is UPnP Enabled?



Any Error Codes you encounter: 80015000B, 416b-4174-A080-0A00-8015-000B



After you run "Test Xbox LIVE connection" press “Y” for "More Info”. In the pop-up that appears, what are the following values, if shown? (If a value below does not appear for you, just leave it blank.)

W: 0000 - 000B

X: 0000 - F001

Y: 0C8A - 0DC0

Z: 8015 - 000B

ID: 0006 - 0000

L: 0015 - 10F1

Q: 0015 - 10F1

T: Wired

D: 192.168.1.1/0.0.0.0

S:

C:

G: 192.168.1.1



A: 192.168.1.103/255.255.255.0







Any help or suggestions will be greatly appreciated.









:)

 

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1. Yes

2. Yes ()

3. Yes

4. on Six GUns the message is "unable to connect to Xbox at this time. Please check your connection"

(I've checked my connection)