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Re: IFA_F_NO_NDISC (for vrrp)

To: jetienne@xxxxxxxxxx, netdev@xxxxxxxxxxx
Subject: Re: IFA_F_NO_NDISC (for vrrp)
From: Andrey Savochkin <saw@xxxxxxxxxxxxx>
Date: Wed, 7 Jun 2000 11:53:49 +0800
In-reply-to: <20000604180651.A678@xxxxxxxxxxxxx>; from "Jerome Etienne" on Sun, Jun 04, 2000 at 06:06:51PM
References: <20000604180651.A678@xxxxxxxxxxxxx>
Sender: owner-netdev@xxxxxxxxxxx

On Sun, Jun 04, 2000 at 06:06:51PM -0400, Jerome Etienne wrote:
> This feature is usefull to support VRRP(rfc2338) which requires
> to answer the ARP request for a 'virtual ip' with the proper
> 'virtual MAC'(rfc2338 section 8.2). So to potentially answer
> a particular MAC for a particular IP, and not with the primary
> MAC. As far as i know, it is currently impossible because linux 
> assumes to have a single MAC per physical interface. My plan is
> to prevent the kernel from answering for the virtual ip addresses
> and to answer from userspace.

Keeping the policy decision in user-space is a wise solution.
But you may just set NOARP flag for the device and do all the stuff in
user-land merging your 'virtual MAC' logic with any ARP daemon.

Best regards
                                        Andrey V.

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