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Date: Sun, 06 Jan 2008 14:29:59 +0000
From: "Bruce M. Simpson" <bms@FreeBSD.org>
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To: Vadim Goncharov <vadim_nuclight@mail.ru>
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Cc: Qing Li <qingli@freebsd.org>, FreeBSD Net <freebsd-net@freebsd.org>,
	arch@freebsd.org, Ivo Vachkov <ivo.vachkov@gmail.com>,
	Robert Watson <rwatson@freebsd.org>, Julian Elischer <julian@elischer.org>
Subject: Re: resend: multiple routing table roadmap (format fix)
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Vadim Goncharov wrote:
>
> Is multicast and multipath routing the same?

No. They are currently orthogonal.

However it makes sense to merge the multicast and unicast forwarding 
code as currently MROUTING is limited to a fan-out of 32 next-hops only. 
In multicast, next-hops are normally just interfaces.

Also the IETF MANET ad-hoc IP is going to need hooks there; multicast in 
MANET needs to address its next-hops by their unicast address, and 
encapsulate the traffic with a header. This is not true link layer 
multicast -- although it might use link layer multicast to leverage the 
hash filters in 802.11 MACs.

As regards getting ARP out of forwarding tables, this should have 
happened a long time ago...

BMS