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Re: kern/41597: Load balancing (ECMP) on NetSD 3.1

The following reply was made to PR kern/41597; it has been noted by GNATS.

From: Matthew Mondor <>
Subject: Re: kern/41597: Load balancing (ECMP) on NetSD 3.1
Date: Mon, 15 Jun 2009 04:50:14 -0400

 On Mon, 15 Jun 2009 07:40:00 +0000 (UTC) wrote:
 > Does NetBSD 3.1 has support for Load balancing?
 > How can I configure Load Balancing on NetBSD in case it has this support?
 I am not sure about older ECMP features if any, but NetBSD has CARP(4)
 (see, which was
 added in netbsd-4 and over.  There might be other redundancy and load
 balancing solutions but I don't personally know them, other than using
 DNS pools (resolving a common host/domain name to various addresses,
 which named(8) can do).
 Unfortunately, the TNF support for netbsd-3 has ended after the release
 of NetBSD 5.0 (see
 for more details) so it is unlikely for CARP(4) to be officially
 pulled-up to netbsd-3 at this time...
 However, since this is a network related question, the mailing list might be a good place to discuss 
 problem further for community support (see and
 I cross-posted this reply there.

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