Date: Tue, 18 Jul 2000 13:36:57 -0700 From: Joe Touch <touch@ISI.EDU> To: itojun@iijlab.net Cc: snap-users@kame.net, Lars Eggert <larse@ISI.EDU>, stable@freebsd.org, xbone@ISI.EDU, touch@ISI.EDU Subject: Re: (KAME-snap 2950) Re: KAME/FreeBSD-stable merge Message-ID: <3974BFE9.8789DB61@isi.edu> References: <17780.963892204@coconut.itojun.org>
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itojun@iijlab.net wrote: > > >The current KAME code does not support multiple tunnels between two > >hosts on a single interface. This restores that capability, which is > >required for setting up different overlay networks which use the same > >pairs of hosts. > > if you consider inbound packets, it does not make sense to have > multiple tunnel interfaces for the same pair of outer addresses . There are two alternatives: #1- multiple tunnels with the same outer wrapper #2- aliases on a GIF The analogy of #2 is ethernet with aliases; a single outer wrapper (ethernet MAC address) on different inner IP src/dest pairs. We note that it is feasible and possible to assign multiple ethernets the same MAC address with different IP addresses, resulting in #1. We are currently trying to determine if aliases suffice, and will post our results when tests are complete. However, we consider aliases _much_ more of a 'hack' than generalizing the capability of GIF tunnels. Joe To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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