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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-9359) Return ip6address in Basic Networking
Date Sat, 03 Dec 2016 02:37:58 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15717205#comment-15717205
] 

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

Github user wido commented on the issue:

    https://github.com/apache/cloudstack/pull/1700
  
    Seems good looking at the tests, right? These VPC tests have been failing for some time
and do not seem to be related to this PR.


> 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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