From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4D519DC8.9070908@candelatech.com> Date: Tue, 08 Feb 2011 11:47:20 -0800 From: Ben Greear MIME-Version: 1.0 References: <4D519986.7070000@ll.mit.edu> In-Reply-To: <4D519986.7070000@ll.mit.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Bridge] Bridge suddenly only passes traffic if in promiscuous mode List-Id: Linux Ethernet Bridging List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jeff Mitchell Cc: bridge@lists.linux-foundation.org On 02/08/2011 11:29 AM, Jeff Mitchell wrote: > Hello, > > I have a bridge to various interfaces. There is an IP address on the > bridge, and hosts on the interfaces connected to the bridge use the > bridge's IP address as a gateway. STP is off and the forwarding delay is > set to 0. > > This has been working fine, however, today I needed to change around > some IPv6 addresses on the connected hosts. I made the IPv6 changes and > rebooted those boxes, only to find that suddenly no traffic -- IPv4 *or* > IPv6 -- was passing through the bridge. > > When I pulled up tshark to see what was going on, traffic suddenly > started flowing again. And even as I type this, as long as tshark is > running on that interface (no matter what the capture filter is), > traffic is flowing. The moment I stop tshark from running, traffic > stops. IOW, the bridge is only passing traffic while in promiscuous mode. > > I didn't change the IP address on the bridge itself. As far as I can > tell I didn't do anything odd whatsoever. But I have no idea what's > causing this and I'd really like to not reboot the box if at all possible. > > Does anyone have any idea what might be causing this and/or how to > troubleshoot this? What kernel version? And, you are sniffing the physical interface, or the bridge? Maybe send us output of brctl show, and ifconfig -a? Promisc bit is sometimes hard to detect properly, so if you can, please post /sys/class/net/[iface-name]/flags If bit 0x100 is set, the NIC is actually promisc, regardless of what ifconfig -a shows. Thanks, Ben > > Thanks, > Jeff > _______________________________________________ > Bridge mailing list > Bridge@lists.linux-foundation.org > https://lists.linux-foundation.org/mailman/listinfo/bridge -- Ben Greear Candela Technologies Inc http://www.candelatech.com