Q: How do I troubleshoot a self-assigned IP error on my TC?
I cannot get connectivity from my Airport Time Capsule after switching cable modems.
1. Cisco DCP2008 cable modem works fine connected directly to either of my two MacBook Airs.
2. I've called my ISP several times; they confirm my signal is fine and modem is working fine.
3. TC is in bridge mode, ipv6 automatica/tunnel receives ipv6 relay error.
a) Confirmed modem and ISP should have no problem with ipv6
b) I can access Google, FB, youtube (ipv4), no other sites.
c) No other devices can connect (iPad, iPhones)
4. Option #1 - Change TC to Link-Local, relay error goes away but then I get a self-assigned IP. No Internet connection.
5. Try DHCP & NAT (instead of default DHCP) in network settings. Keep Link-local. TC is green light, but no Internet connection. Switch back to Automatic/DHCP, still no dice.
6. Try creating a new location in my wifi settings and renewing DHCP Lease, nothing.
I've tried all these configurations, rebooting, resetting, and sprinkling fairy dust.
TC worked five days ago with TWC Arris wi-fi modem set up (i believe) in bridge mode.
MacBook Air (13-inch Mid 2013), OS X Yosemite (10.10.5)
Posted on Mar 19, 2016 10:03 AM
The modem recognizes your Mac, but not the Time Capsule. Until the modem completely resets, it will continue to only recognize your Mac, and it will ignore the Time Capsule.
Sometimes it takes 2+ hours for my ISP to allow the modem to completely reset when I am making a change to the device that connects to the modem, so try powering off the modem for an extended time.....3-4 hours, or even overnight, then try again in the morning. If there is a reset button on the modem, use it for that purpose, then power off the modem for the extended time period.
Or, with the Time Capsule connected to the modem, call the ISP and ask them if they can reset the modem for you from their headquarters.
If still no luck, you will need to reset the TC back to default settings and then configure it again.....which is what I usually do whenever I change the modem......but was trying to save you from this extra work if possible.
Posted on Mar 19, 2016 11:56 AM
