Hi All,
I've got a weird situation. Just to give background, my ISP gives out IPv6 with PD of /56 for a couple of yours now. I've disabled IPv6 on my network for the past 2 years due to my ISP's routing for IPv6 was sh*tty. For the past 2-3 days I've been trying to re-enable IPv6 on my network so to test if IPv6 routing improved already. I was at my wits end because it seems (I thought) that it's not working on mine but I've asked around with my peers who are using OpenWRT and same ISP that they have working IPv6. I've even tried resetting to default config but (again I thought) it's really not working on my side. I'm getting IPv6 addresses properly on the router and the downstream devices but it seems it was not working properly.
Got frustrated that I just copied IPv6 related config default config (network, firewall and dhcp) to my config then just leave it even if it's not working. Let me re-iterate I thought it was not working.
Now here is where it got weird, which I thought it was really not working. I tried doing a ping -6 google.com
just to check on my laptop and lo and behold, it got a proper response. Huh!?? What was weird is, I've been doing the testing on the router itself doing various ping -6
, curl <ipv6 address, ex: ipv6.google.com>
, and traceroute -6
and none of them was working.
All IPv6 testing I did wasn't working (only) in the router. All my downstream devices has a working IPv6. I even have a router (openwrt based also) downstream and it too has a working IPv6.
Now the question is, why is IPv6 not working on the router itself?? Below are traceroute from within the router itself and one of my devices.
Traceroute inside the router Note: partially masked IPv6 addresses in the output
# traceroute6 google.com
traceroute to google.com (2404:6800:4017:803::200e), 30 hops max, 72 byte packets
1 2001:XXXX:XXXX:a2::1 (2001:XXXX:XXXX:a2::1) 2.627 ms 2.330 ms 2.094 ms
2 * * *
3 * * *
4 * * *
5 * * *
6 *
Traceroute with one of the downstream devices
traceroute6 to google.com (2404:6800:4017:803::200e) from 2001:XXXX:XXXX:f100:f1f5:XXXX:XXXX:cf12, 64 hops max, 12 byte packets
1 2001:XXXX:XXXX:f100::1 0.428 ms 0.290 ms 0.302 ms
2 2001:XXXX:XXXX:a2::1 2.563 ms 2.571 ms 2.281 ms
3 2001:XXXX:XXXX:a2:: 2.192 ms
2001:XXXX:XXXX:a3:: 2.850 ms 2.406 ms
4 *
2001:XXXX:XXXX:6000::7d 2.698 ms
2001:XXXX:XXXX:2000::a 1.760 ms
5 *
2001:XXXX:XXXX:6000::c1 26.212 ms *
6 2001:XXXX:XXXX:1::af4 27.755 ms
2001:XXXX:XXXX:1::17c6 26.109 ms 26.005 ms
7 2404:6800:8161::1 26.263 ms
2404:6800:8041::1 26.120 ms
2404:6800:802f::1 26.333 ms
8 2001:4860:0:1::5516 27.369 ms
2001:4860:0:1::56a4 26.005 ms
2001:4860:0:1::4a4 26.586 ms
9 2001:4860:0:e04::4 27.004 ms
2001:4860:0:e07::e 46.180 ms
2001:4860:0:e05::e 26.574 ms
10 2001:4860::c:4000:db82 26.295 ms
2001:4860::c:4001:2282 79.164 ms
2001:4860::c:4000:db81 30.546 ms
11 2001:4860::c:4003:1cb0 83.681 ms
2001:4860::c:4003:1cb8 1602.699 ms 779.534 ms
12 2001:4860::c:4002:f3dc 108.587 ms
2001:4860::c:4002:f3dd 82.224 ms
2001:4860::c:4002:f3dc 92.274 ms
13 2001:4860::9:4002:f3a8 74.877 ms
2001:4860::9:4002:f38f 79.072 ms
2001:4860::9:4002:f3a9 74.171 ms
14 2001:4860:0:1::2f0f 72.659 ms
2001:4860:0:1::3d4d 75.447 ms
2001:4860:0:1::2f09 73.252 ms
15 mnl08s01-in-x0e.1e100.net 72.635 ms 73.302 ms 72.710 ms