The patch to ipip.c seems to be needed if xrfm_tunnel (INET_TUNNEL) is defined as a module, or you can't have both the xfrm_tunnel module and ipip modules loaded at the same time.
--- linux-2.6.15/net/ipv4/ipip.c.orig 2006-02-28 10:46:37.000000000 -0500 +++ linux-2.6.15/net/ipv4/ipip.c 2006-02-28 10:47:00.000000000 -0500 @@ -851,7 +851,8 @@ return 0; } -#ifdef CONFIG_INET_TUNNEL +#if defined(CONFIG_INET_TUNNEL) || defined(CONFIG_INET_TUNNEL_MODULE) + static struct xfrm_tunnel ipip_handler = { .handler = ipip_rcv, .err_handler = ipip_err, - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html