Re: [dhcwg] RFC3315 DECLINE definition

"Mudric, Dusan (Dusan)" <dmudric@avaya.com> Thu, 09 February 2017 16:06 UTC

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From: "Mudric, Dusan (Dusan)" <dmudric@avaya.com>
To: Ted Lemon <mellon@fugue.com>
Thread-Topic: [dhcwg] RFC3315 DECLINE definition
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Date: Thu, 9 Feb 2017 16:06:08 +0000
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Cc: dhcwg <dhcwg@ietf.org>, Bernie Volz <volz@cisco.com>
Subject: Re: [dhcwg] RFC3315 DECLINE definition
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Let's say there is a deployment within an enterprise of 20 000 devices, each with DHCPv6 enabled. They are on different locations and use different DHCPv6 servers. One server is configured to statically assign IPv6 addresses (based on the client MAC) or with a pool of IPv6 addresses for the local link. If a client on that location assigns the misconfigured address it becomes unreachable. A user does not even know how to spell DHCPv6 and all he/she experiences is that the device is unusable. The network operator does not get any indication that the device is out of service.

If the client is able to tell the server that the address cannot be used, the administrator should be able to get some notification about the problem (e.g. an alarm), and find in the server log there was the configuration problem. The server might be able to automatically solve the issue. For example, the server can be configured with different address pools (e.g. using different address types) and the server can offer the address from a different address pool.

Regards,
Dusan.

-----Original Message-----
From: Ted Lemon [mailto:mellon@fugue.com] 
Sent: Thursday, February 09, 2017 10:48 AM
To: Mudric, Dusan (Dusan)
Cc: Bernie Volz; dhcwg
Subject: Re: [dhcwg] RFC3315 DECLINE definition

On 9 Feb 2017, at 10:46, Mudric, Dusan (Dusan) wrote:
> The first problem statement is about the server misconfiguration. 
> Instead of client silently ignoring the offered address, or even 
> worse, assigning the misconfigured address, the server (and
> administrator) should be informed about the misconfiguration.

How does this make things better?