# IPV6 stopped working after recent update

**URL:** <https://forum.alta.inc/t/ipv6-stopped-working-after-recent-update/6857>\
**Category:** Routers\
**Created:** [July 16, 2026, 9:24am UTC](https://forum.alta.inc/t/ipv6-stopped-working-after-recent-update/6857 "2026-07-16T09:24:09Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![mentalinc](https://forum.alta.inc/letter_avatar_proxy/v4/letter/m/d07c76/32.png) [@mentalinc](https://forum.alta.inc/u/mentalinc)\
**Post date:** [July 16, 2026, 9:24am UTC](https://forum.alta.inc/t/ipv6-stopped-working-after-recent-update/6857/1 "2026-07-16T09:24:09Z")

</div>

IPv6 seems to have stopped working. WAN isn’t being provided with an IPv6 address, and therefore none of the LANs

Everything was working, no changes made to Route10 (other than maybe a firmware update).

On WAN1, I have a Static IP (v4 and V6), PD Size is a /56 (per ISP config guidance DHCPv6-PD), VLAN 10 enabled. MTU 1500 - but can’t see were to set this in the cloud controller.

On VLANs I have the default 1 IPv6 enabled

 ![image](https://forum.alta.inc/uploads/default/original/2X/7/7bce5af89dac49b6ed9b00e7bafe64a179674cab.png)

 ![image](https://forum.alta.inc/uploads/default/original/2X/3/38acc89552dfed3a9a12320bcfd4abcecdd01cd4.png)

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<div class="post-metadata">

**Author:** ![Alta-Jeff](https://forum.alta.inc/user_avatar/forum.alta.inc/alta-jeff/32/56_2.png) [@Alta-Jeff](https://forum.alta.inc/u/Alta-Jeff)\
**Post date:** [July 16, 2026, 11:27pm UTC](https://forum.alta.inc/t/ipv6-stopped-working-after-recent-update/6857/2 "2026-07-16T23:27:29Z")

</div>

I have IPv6 working here on all of the latest firmware. Is ping6 working from the Route10? Do you see the IPv6 frames get routed to the ISP connection?

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<div class="post-metadata">

**Author:** ![mentalinc](https://forum.alta.inc/letter_avatar_proxy/v4/letter/m/d07c76/32.png) [@mentalinc](https://forum.alta.inc/u/mentalinc)\
**Post date:** [July 16, 2026, 11:48pm UTC](https://forum.alta.inc/t/ipv6-stopped-working-after-recent-update/6857/3 "2026-07-16T23:48:09Z")

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Yes on latest firmware.

There are no ipv6 addresses being applied to any of the interfaces.

So not sure ping6 will do anything without the ipv6 being applied

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<div class="post-metadata">

**Author:** ![mentalinc](https://forum.alta.inc/letter_avatar_proxy/v4/letter/m/d07c76/32.png) [@mentalinc](https://forum.alta.inc/u/mentalinc)\
**Post date:** [July 17, 2026, 8:14am UTC](https://forum.alta.inc/t/ipv6-stopped-working-after-recent-update/6857/4 "2026-07-17T08:14:03Z")

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From ssh into the Route 10

```auto
ping6 google.com
PING google.com (2404:6800:4006:800::200e): 56 data bytes
ping6: sendto: Permission denied

ip -6 route show
::/64 dev eth3.10 proto static metric 256 pref medium
fe80::/64 dev eth5 proto kernel metric 256 pref medium
fe80::/64 dev br-lan_100 proto kernel metric 256 pref medium
fe80::/64 dev eth3 proto kernel metric 256 pref medium
fe80::/64 dev br-lan proto kernel metric 256 pref medium
fe80::/64 dev eth3.10 proto kernel metric 256 pref medium
fe80::/64 dev br-lan_110 proto kernel metric 256 pref medium
fe80::/64 dev br-lan_200 proto kernel metric 256 pref medium
fe80::/64 dev ifb4eth4.10 proto kernel metric 256 pref medium
fe80::/64 dev ifb4eth3.10 proto kernel metric 256 pref medium

uci show network.wan
network.wan=interface
network.wan.ifname='eth3.10'
network.wan.metric='100'
network.wan.dns_metric='100'
network.wan.proto='dhcp'
network.wan.norelease='1'
network.wan.ipaddr='x.x.x.x'
network.wan.peerdns='1'

uci show network.wan6
network.wan6=interface
network.wan6.proto='dhcpv6'
network.wan6.ifname='eth3.10'
network.wan6.norelease='1'
network.wan6.peerdns='1'
network.wan6.reqprefix='56'

```

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<div class="post-metadata">

**Author:** ![Alta-Jeff](https://forum.alta.inc/user_avatar/forum.alta.inc/alta-jeff/32/56_2.png) [@Alta-Jeff](https://forum.alta.inc/u/Alta-Jeff)\
**Post date:** [July 17, 2026, 5:28pm UTC](https://forum.alta.inc/t/ipv6-stopped-working-after-recent-update/6857/5 "2026-07-17T17:28:53Z")

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Have you tried a PD of 64? Can I get an invite to take a look?