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---
title: "v2.2.1 - UE IPv6 Support"
date: 2021-03-15 09:38:00 +0900
categories:
  - Release
tags:
  - News
  - Release
head_inline: "<style> ul { padding-bottom: 1em; } .blue { color: blue; }</style>"
---

#### IMPORTANT

To use the new WebUI v2.2.1, you have to log out and log back in to reset your browser token information.
{: .blue}

#### UE IPv6 Support
- If the SMF receives Router Solicitation Message through UPF, it sends Router Advertisement Message to the UE through UPF.
- If the UPF matches the IPv6 Prefix instead of Full IPv6 address, it forwards the packet to the UE. ([#808](https://github.com/open5gs/open5gs/issues/808)) -- [kbarlee](https://github.com/kbarlee), [byteburner](https://github.com/byteburner) 

#### Enhancement
- Adding API tokens to WebUI to improve security vulnerabilities ([#838](https://github.com/open5gs/open5gs/pull/838)) -- [rashley-iqt](https://github.com/rashley-iqt)

#### Bug Fixes
- [AMF] Fixed a problem that occurs when the UE does not send S-NSSAI in UL NAS Transport message ([#845](https://github.com/open5gs/open5gs/issues/845)) -- [mcatalancid](https://github.com/mcatalancid)
- [AMF] Fixed a problem that occurs when the UE does not send Request-NSSAI in Registration request([#844](https://github.com/open5gs/open5gs/issues/844)) -- [ggardikis](https://github.com/ggardikis)
- [MME] Fixed the infinit loop related to Delete-Session-Request ([#568](https://github.com/open5gs/open5gs/issues/568)) -- [domgth](https://github.com/domgth)


Download -- [v2.2.1.tar.gz](https://github.com/open5gs/open5gs/archive/v2.2.1.tar.gz)
{: .notice--info}