[OpenIndiana-discuss] IPv6 DHCP

[Richard L. Hamilton]

You have (service names from an earlier release, may not be identical):
EITHER
svc:/network/physical:nwam
OR
svc:/network/physical:default

Only one of those can be used.  The first tries to Do The Right Thing, automagically (including DHCP and all that); the second is for a straightforward static configuration.

Nwam probably makes sense for something mobile, like a laptop.  It _may_ make sense for fixed workstations if the infrastructure is there to use it, so that workstation deployment can be simplified.  It probably does _not_ make sense for a server, most of the time.

You can't really mix and match features between the two.  Well, you probably could, by creating a third alternative using some of what the others use as tools.  But that's neither supported nor easy.

On Feb 27, 2012, at 6:32 PM, Robbie Crash wrote:

> Is configuring these things through nwam not the /proper/ way to do things?
> I don't understand why all the help pages say to disable nwam for static IP
> configuration.
> 
> On Mon, Feb 27, 2012 at 15:58, James Carlson <carlsonj at workingcode.com>wrote:
> 
>> russell wrote:
>>> Hi,
>>> 
>>> I have configured my OI_151 installation with a static IPv4 address and
>>> would like to configure IPv6 to work with DHCP but the notes I've found
>>> appear to require nwam to be running but I have disabled this.
>> 
>> Might be helpful to provide a link or a copy of those notes.  They don't
>> sound accurate.
>> 
>>> I would appreciate a suggestion on how to configure OI manually to only
>>> use DHCP for IPv6. I would like to have the IPv6 use both SLAAC and a
>>> DHCPv6 server.
>> 
>> The standards-compliant way to do this is to plumb up one or more IPv6
>> interfaces and make sure that svc:/network/routing/ndp:default is enabled.
>> 
>> When you do that, in.ndpd(1M), the IPv6 autoconfiguration daemon, will
>> run.  That daemon will listen to ICMPv6 Router Advertisement messages.
>> If the messages say that a given prefix uses DHCPv6, then it will
>> automatically start dhcpagent(1M), and that will configure the address.
>> (Unlike DHCPv4, the prefix length -- aka "subnet" -- comes from the RA,
>> not from the DHCP server.  Only the address itself comes from DHCP.
>> It's how DHCPv4 should have been done ...)
>> 
>> If you have one or more IPv6 routers, and they all say that you
>> shouldn't run DHCPv6 on a prefix, then it will not be run.  If you have
>> no IPv6 routers (a bit of a degenerate case in the standards), then
>> DHCPv6 is required to run, and the system will run it, but it's almost
>> completely useless.
>> 
>> See in.ndpd(1M), dhcpagent(1M), and ifconfig(1M) for details.
>> 
>> --
>> James Carlson         42.703N 71.076W         <carlsonj at workingcode.com>
>> 
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>> 
> 
> 
> 
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> 
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