AT&T Broken Uverse IPv6 routing.

Brandon Jackson bjackson at napshome.net
Tue Jun 6 22:32:49 CST 2017


Sorry for the noise but normal support channels are not understanding IPv6
is broken, they just see IPv4 works.

Can anyone contact me or maybe provide a contact or pass this along to
someone in ATT who can deal with broken IPv6 routing for Uverse Res/Small
Biz IPv6 blocks that are being assigned.

For Example one block that was delegated via DHCP-DP is
2600:1700:8250:8390::/60 tracing to it from anywhere outside of AT&T gets a
"Destination net unreachable".

Note this seems to have going on since atleast the 31st but likely longer,
that's just when the gateway was updated to DHCP-PD from 6rd. 3 Examples of
traces below.

Note even 2001:506:7825:839::1 seems to issues with connectivity but it
might not matter as much as that just the "WAN" of the gateway.

>From an HE.net connection
 2  ge5-4.core1.ash1.he.net (2001:470:0:90::1)  25.200 ms  24.878 ms
 24.650 ms
 3  100ge3-1.core1.nyc4.he.net (2001:470:0:299::2)  33.407 ms  25.643 ms
 25.245 ms
 4  as7018-att.10gigabitethernet2-3.core1.nyc4.he.net (2001:470:0:1dd::2)
 29.880 ms !N  32.288 ms !N  31.917 ms !N

>From Cogent Looking Glass in ATL

traceroute to 2600:1700:8250:8390::1 (2600:1700:8250:8390::1), 30 hops max,
80 byte packets
 1  2001:550:1:310::1 (2001:550:1:310::1)  0.989 ms  0.992 ms
 2  te0-18-0-2.ccr42.atl01.atlas.cogentco.com (2001:550:0:1000::9a36:2fc5)
 0.983 ms  0.990 ms
 3  be2848.ccr41.atl04.atlas.cogentco.com (2001:550:0:1000::9a36:676)
 2.018 ms be2790.ccr22.atl02.atlas.cogentco.com
(2001:550:0:1000::9a36:1ba6)  1.191 ms
 4  2001:1890:1fff:501:192:205:36:237 (2001:1890:1fff:501:192:205:36:237)
 8.640 ms !N 2001:550:3::166 (2001:550:3::166)  8.270 ms !N


>From Sprint Looking Glass in ATL

traceroute6 to 2600:1700:8250:8390::1 (2600:1700:8250:8390::1) from
2600:0:1:1239:144:228:243:98, 64 hops max, 12 byte packets
 1  sl-mst50-atl-ae10.0.v6.sprintlink.net (2600:0:2:1239:144:232:14:86)
 0.635 ms  0.551 ms  0.457 ms
 2  2600:0:3:1239:144:232:0:6a (2600:0:3:1239:144:232:0:6a)  6.672 ms !N
 7.277 ms !N  7.984 ms !N


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