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Re: [mif] New Version Notification for draft-reddy-mif-dhcpv6-precedence-ops-02.txt

"Tirumaleswar Reddy (tireddy)" <tireddy@cisco.com> Sun, 21 October 2012 02:55 UTC

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From: "Tirumaleswar Reddy (tireddy)" <tireddy@cisco.com>
To: Ted Lemon <Ted.Lemon@nominum.com>
Thread-Topic: [mif] New Version Notification for draft-reddy-mif-dhcpv6-precedence-ops-02.txt
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Date: Sun, 21 Oct 2012 02:55:03 +0000
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Cc: "mif@ietf.org" <mif@ietf.org>
Subject: Re: [mif] New Version Notification for draft-reddy-mif-dhcpv6-precedence-ops-02.txt
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> -----Original Message-----
> From: Ted Lemon [mailto:Ted.Lemon@nominum.com]
> Sent: Saturday, October 20, 2012 9:42 AM
> To: Tirumaleswar Reddy (tireddy)
> Cc: mif@ietf.org
> Subject: Re: [mif] New Version Notification for draft-reddy-mif-dhcpv6-
> precedence-ops-02.txt
> 
> On Oct 19, 2012, at 11:03 PM, Tirumaleswar Reddy (tireddy) <tireddy@cisco.com>
> wrote:
> > Switches acting as DHCP relay agent can influence the DHCP server not to
> assign temporary addresses.
> 
> Okay, so this is preventing DHCP assignment of IA_TA, not assignment of
> temporary addresses in general.

Hi Ted,

Yes. In such Managed Networks, SLAAC is disabled and IPv6 addresses are only assigned using DHCPv6 server. Switches in such environments provide First Hop Security by gleaning DHCP/NDP messages and can make sure hosts are using the IPv6 addresses assigned by the DHCPv6 server only (Source Guard). With the technique in this draft only certain hosts will be permitted assignment of IA_TA and not for other hosts. 

--Tiru.

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