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From "rashmidixit (JIRA)" <>
Subject [jira] [Commented] (CLOUDSTACK-9359) Return ip6address in Basic Networking
Date Fri, 27 Jan 2017 00:15:24 GMT


rashmidixit commented on CLOUDSTACK-9359:

Github user asfgit closed the pull request at:

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> Return ip6address in Basic Networking
> -------------------------------------
>                 Key: CLOUDSTACK-9359
>                 URL:
>             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:
> 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
> 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

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