Bug 1661235

Summary:	[Docs] OSP13 - Add a section on IPv6 in OVN listing the current status of IPv6
Product:	Red Hat OpenStack	Reporter:	Numan Siddique <nusiddiq>
Component:	documentation	Assignee:	James Smith <jamsmith>
Status:	CLOSED CURRENTRELEASE	QA Contact:	RHOS Documentation Team <rhos-docs>
Severity:	unspecified	Docs Contact:
Priority:	high
Version:	13.0 (Queens)	CC:	bhaley, dcadzow, ffernand, jamsmith, jlibosva, mburns
Target Milestone:	---	Keywords:	Triaged
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Hardware:	Unspecified
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Last Closed:	2021-03-05 21:22:55 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Numan Siddique 2018-12-20 14:35:15 UTC

Description of problem:

IPv6 support in OVN has few missing features. It would be good to add a section about IPv6 here - https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html-single/networking_with_open_virtual_network/

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OSP13 with OVN supports creating IPv6 networks. However there are a couple of issues
 
  1. Prefix delegation is not yet supported in OVN. So the user has to create private IPv6 subnets with the appropriate GUA prefixes manually.

  2.  There is no default route added by networking-ovn to route the traffic to gateway IP of the IPv6 public network subnet. Without this, the North-South routing will not work if the VM wants to send a N/S packet with the IPv6 destination IP which doesn't belong to the IPv6 public subnet. - https://bugs.launchpad.net/networking-ovn/+bug/1808753

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