# IPV6 property for Flannel addon **URL:** \ **Category:** Feature Requests\ **Tags:** kurl\ **Created:** [August 26, 2023, 11:01am UTC](https://community.replicated.com/t/ipv6-property-for-flannel-addon/1285 "2023-08-26T11:01:18Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Sabrina](https://avatars.discourse-cdn.com/v4/letter/s/51bf81/32.png) [@Sabrina](https://community.replicated.com/u/Sabrina)\ **Post date:** [August 26, 2023, 11:01am UTC](https://community.replicated.com/t/ipv6-property-for-flannel-addon/1285/1 "2023-08-26T11:01:18Z")
Hi, we recently experienced networking interfaces on our VM going up and down constantly. We found that the problem was IPV6 was turned on the VM but support for IPV6 is turned off by default in Flannel. Considering the fact that IPV6 is present on many servers and our product is installed on servers we don’t control, we’d like to be able to turn on IPV6 for Flannel from the Kurl installer. Thanks ---
**Author:** ![diamon\_w](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.replicated.com/diamon_w/32/150_2.png) [@diamon\_w](https://community.replicated.com/u/diamon_w)\ **Post date:** [August 28, 2023, 6:00pm UTC](https://community.replicated.com/t/ipv6-property-for-flannel-addon/1285/2 "2023-08-28T18:00:39Z")
Hello Sabrina 👋 Today for our Flannel addon, IPV6 and dual stack networks aren’t supported. See - [https://kurl.sh/docs/add-ons/flannel#limitations](https://kurl.sh/docs/add-ons/flannel#limitations). Would you mind creating a feature request via [Replicated](https://vendor.replicated.com/support) for this re-iterating what you mentioned here as well as any other requirements you have? ---
**Author:** ![Sabrina](https://avatars.discourse-cdn.com/v4/letter/s/51bf81/32.png) [@Sabrina](https://community.replicated.com/u/Sabrina)\ **Post date:** [August 29, 2023, 10:19am UTC](https://community.replicated.com/t/ipv6-property-for-flannel-addon/1285/3 "2023-08-29T10:19:25Z")
Hi, i did a quick search about dual stack networks for kubernetes. It seems since 1.21 it’s turned on by default. > **[IPv4/IPv6 dual-stack](https://kubernetes.io/docs/concepts/services-networking/dual-stack/)** > > Kubernetes lets you configure single-stack IPv4 networking, single-stack IPv6 networking, or dual stack networking with both network families active. This page explains how. If it’s turned off in flannel, then the kurl installation should turn it off on kubernetes. > **[How to Disable ipv6 Kubernetes?](https://bobcares.com/blog/disable-ipv6-kubernetes/)** > > It is easy to disable ipv6 Kubernetes. The Ipv6 can be disabled on all worker nodes by giving certain commands to the nodes. ---
**Author:** ![diamon\_w](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.replicated.com/diamon_w/32/150_2.png) [@diamon\_w](https://community.replicated.com/u/diamon_w)\ **Post date:** [August 29, 2023, 4:33pm UTC](https://community.replicated.com/t/ipv6-property-for-flannel-addon/1285/4 "2023-08-29T16:33:46Z")
Yeah, the missing piece from Replicated’s standpoint that’s mentioned in the [Prerequisites](https://kubernetes.io/docs/concepts/services-networking/dual-stack/#prerequisites) would be: > A network plugin that supports dual-stack networking. This is where you’re currently seeing issues with Flannel. ---
**Author:** ![Sabrina](https://avatars.discourse-cdn.com/v4/letter/s/51bf81/32.png) [@Sabrina](https://community.replicated.com/u/Sabrina)\ **Post date:** [August 30, 2023, 6:08pm UTC](https://community.replicated.com/t/ipv6-property-for-flannel-addon/1285/5 "2023-08-30T18:08:39Z")
Can’t the installer also disable ipv6 in kubernetes ? ---
**Author:** ![diamon\_w](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.replicated.com/diamon_w/32/150_2.png) [@diamon\_w](https://community.replicated.com/u/diamon_w)\ **Post date:** [September 1, 2023, 1:35pm UTC](https://community.replicated.com/t/ipv6-property-for-flannel-addon/1285/6 "2023-09-01T13:35:12Z")
> Can’t the installer also disable ipv6 in kubernetes ? Sorry for the late response here. I think at this point it would be best if you could get that feature request opened, so we can understand holistically the problem you faced, and what you’re trying to solve. It’s not clear from the support issue we worked with you on how much the `ipv6` issues played into what you saw vs. the memory pressure on nginx. We can evaluate further from the feature request any potential optimizations necessary in our `ipv6` configuration in kURL when Flannel is used. ---
**Author:** ![Sabrina](https://avatars.discourse-cdn.com/v4/letter/s/51bf81/32.png) [@Sabrina](https://community.replicated.com/u/Sabrina)\ **Post date:** [September 1, 2023, 2:07pm UTC](https://community.replicated.com/t/ipv6-property-for-flannel-addon/1285/7 "2023-09-01T14:07:31Z")
I’ve create this [https://github.com/replicated-collab/redgate-kots/issues/94](https://github.com/replicated-collab/redgate-kots/issues/94)