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Thread-Topic: CARP and L2 src-MAC
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From: "Jon Otterholm" <jon.otterholm@ide.resurscentrum.se>
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Subject: CARP and L2 src-MAC
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Hi.

We have a situation where we want to use CARP in a TPSDA-network and got
some problems.=20

The master CARP router ARP response contains the correct virtual MAC but
uses the physical interface MAC in L2 header. This is OK for the client =
but
the switches in between the router and the client will not learn the =
virtual
MAC. This will work in a =B3normal=B2 switched network but will fail in =
a TPSDA
network where all L2 devices will not learn the virtual MAC. In this =
case
the network is built upon Alcatel iSAM FTTU and because all =
CARP-messages is
broadcast they will not learn the virtual MAC.

Is it possible to tweak CARP to use the virtual MAC in L2 header instead =
of
the physical interface MAC? Could this be implemented as a feature
controlled by a sysctl?

//Jon