IPv6 RDNS not working

[timriker]

This is for: "d2cf9574-608e-41e0-373a-adbac913619f" or https://docs.microsoft.com/en-us/azure/virtual-network/ipv6-overview

The previous version of this article mentions that reverse DNS is not available for Azure public ip IPv6 addresses. This version does not say this, but adding RDNS to a public IP still does not work:

https://docs.microsoft.com/en-us/azure/dns/dns-reverse-dns-for-azure-services

$ az network public-ip create --name joe-v6 -g play2-rg --sku basic --allocation-method dynamic --version IPv6 --dns-name joe --reverse-fqdn joe.westus2.cloudapp.azure.com Cannot specify reverse fqdn 'joe.westus2.cloudapp.azure.com' for IPv6 PublicIp '/subscriptions/[id]/resourceGroups/play2-rg/providers/Microsoft.Network/publicIPAddresses/joe-v6'.

The article should mention this limitation. It might also mention that:

• public ipv6 addresses can only be dynamic. There is no support for static IPv6 as far as I am aware
• public ipv6 addresses can only be assigned to load balancers, and not to hosts
• icmp does not work for ipv6
• there is no support for IPv6 only resources. Everything must also have an IPv4 address (thus defeating most of the reason for wanting IPv6)

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Document Details

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• ID: 747960d4-d025-37a9-8be2-bc312d5f2e3f
• Version Independent ID: d2cf9574-608e-41e0-373a-adbac913619f
• Content: Overview of IPv6 for Azure Virtual Network (Preview)
• Content Source: articles/virtual-network/ipv6-overview.md
• Service: virtual-network
• GitHub Login: @KumudD
• Microsoft Alias: kumud

[SaurabhSharma-MSFT]

@timriker Thanks for your feedback! We will investigate and update as appropriate.

[TravisCragg-MSFT]

@timriker Thanks for the feedback! I have assigned the issue to the content author to evaluate and update as appropriate.

[KumudD]

reassign: EricTheRed999

[EricTheRed999]

We've updated the IPv6 Limitations section to note that IPv6 Reverse DNS is not currently supported. It is under development and we hope to make it available soon. A couple notes on other comments- With the GA of IPv6 for Azure VNETs:

• Public IPv6 can be static (reserved) or dynamic
• Public IPv6 endpoints can be added to both load balancers and VMs (add to the IPv6 IPconfig on the NIC)
• As for IPv4 in Azure, ICMP is allowed within a VNET and when using Public IP's on a VM but is not allowed when using Public IP's on a load balancer.
  Many Thanks for your help.

[KumudD]

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