--On Tuesday, April 28, 2020 10:16 PM -0500 Chris Adams <linux at cmadams.net> wrote: > I didn't get that you have a static assignment (presumably a business > connection) - they may not do RAs on that (I don't at my ISP job). > Business connections (or at least, connections with static assignments) > tend to operate differently. For that, they should have given you a > static v6 address and gateway, just like they did for v4. I didn't think to ask when we were turning up the v4 and phones. I'm betting there's a setting in their gateway box but I'm waiting for them to give me the credentials to log into it. > So... there's one thing you could try (but probably won't work to a > regular router interface) - see if there's a MAC-derived fe80::/64 > link-local address on their end. Get the MAC of the gateway from the v4 > ARP entry and expand it to a LL v6 address as fe80::xxxx:xxff:fexx:xxxx > (split the MAC, put ff:fe in the middle). Try ping6 that address with > %em2 appended (have to append the interface when using link-local > addresses). I doubt it'll work, since I know Juniper (which IIRC AT&T > likes) doesn't assign those (I can't remember for sure about Cisco and > don't have a handy test target). Good idea but alas it's not routing. I can ping6 their gateway but it won't route after I add it to the route table for the WAN interface. While pinging a remote server, in a second shell I can tcpdump icmp6 packets and I see the packets going out but no replies coming back. > And frankly, giving you a /56 is pretty crappy, since ARIN rules say to > give every site a /48. I'd only do a /56 for a home connection prefix > delegation. But, that's AT&T! :) I'd just read about that when researching this. Maybe they decided that since we only have about a dozen people at our site, we won't have a lot of subnets. What do small offices DO with 256 public subnets, anyway? I suppose eventually we'll have an IoT subnet on every person.