From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: GRE devices and MULTICAST flag. Date: Fri, 23 Sep 2011 12:56:35 -0700 Message-ID: <4E7CE473.3000304@candelatech.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: netdev Return-path: Received: from mail.candelatech.com ([208.74.158.172]:53094 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751937Ab1IWT4g (ORCPT ); Fri, 23 Sep 2011 15:56:36 -0400 Received: from [192.168.100.111] (firewall.candelatech.com [70.89.124.249]) (authenticated bits=0) by ns3.lanforge.com (8.14.2/8.14.2) with ESMTP id p8NJuZEa028679 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 23 Sep 2011 12:56:36 -0700 Sender: netdev-owner@vger.kernel.org List-ID: I was under the impression that GRE tunnels could support MULTICAST traffic, but the MULTICAST flag is not set. This is making the xorp router crap out because it checks the MULTICAST flag and will not start multicast on the interface if it's not set.... Is it supposed to be set? 7: gre0: mtu 1476 qdisc noqueue state UNKNOWN link/gre 0.0.0.0 brd 0.0.0.0 8: netb: mtu 1476 qdisc noqueue state UNKNOWN link/gre 192.168.100.223 peer 192.168.100.138 inet 10.0.1.1/32 scope global netb Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com