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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-9359) Return ip6address in Basic Networking
Date Thu, 20 Oct 2016 07:58:58 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15591132#comment-15591132
] 

ASF GitHub Bot commented on CLOUDSTACK-9359:
--------------------------------------------

Github user wido commented on the issue:

    https://github.com/apache/cloudstack/pull/1700
  
    @rhtyd Thanks! I've updated and squashed the commits. Commit message now also shows more
information.
    
    Feedback is welcome! Currently working on the Security Grouping for IPv6. Will send each
bit in as different, small, Pull Requests.


> Return ip6address in Basic Networking
> -------------------------------------
>
>                 Key: CLOUDSTACK-9359
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9359
>             Project: CloudStack
>          Issue Type: Sub-task
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: API, Management Server
>         Environment: CloudStack Basic Networking
>            Reporter: Wido den Hollander
>            Assignee: Wido den Hollander
>              Labels: api, basic-networking, ipv6
>             Fix For: Future
>
>
> In Basic Networking Instances will obtain their IPv6 address using SLAAC (Stateless Autoconfiguration)
as described in the Wiki: https://cwiki.apache.org/confluence/display/CLOUDSTACK/IPv6+in+Basic+Networking
> When a ip6cidr is configured and is a /64 we can calculate the IPv6 address an Instance
will obtain.
> There is no need to store a IPv6 address in the database with the /64 subnet (ip6cidr)
and the MAC address we can calculate the address using EUI-64:
> "A 64-bit interface identifier is most commonly derived from its 48-bit MAC address.
A MAC address 00:0C:29:0C:47:D5 is turned into a 64-bit EUI-64 by inserting FF:FE in the middle:
00:0C:29:FF:FE:0C:47:D5. When this EUI-64 is used to form an IPv6 address it is modified:[1]
the meaning of the Universal/Local bit (the 7th most significant bit of the EUI-64, starting
from 1) is inverted, so that a 1 now means Universal. To create an IPv6 address with the network
prefix 2001:db8:1:2::/64 it yields the address 2001:db8:1:2:020c:29ff:fe0c:47d5 (with the
underlined U/L (=Universal/Local) bit inverted to a 1, because the MAC address is universally
unique)."
> The API should return this address in the ip6address field for a NIC in Basic Networking.
> End-Users can use this, but it can also be used internally by Security Grouping to program
rules.



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