I'm not sure whether your multicast issue is at the datalink layer or network layer. In the past, I did experience issues with Ethernet multicasting when the packets are IP; all IP packets with a multicast address were being discarded i.e. MAC addresses with the value of 1 set in the least-significant bit of the first octet.

Apr 12, 2017 · the target MAC is a broadcast or a multicast address. In this case, the frame is passed to the br_pass_frame_up() function. A VLAN-related check is optionally performed. The socket buffer is attached to the bridge interface (br0) instead of the physical interface (eth0), is evaluated by Netfilter and sent back to netif_receive_skb(). It will go through the four steps a second time. brctl setmcsqc sets the 'multicast startup query count' to . brctl setmclmi

Jan 31, 2019 · Linux Bridge As mentioned above, the Open vSwitch is a multilayer virtual switch, which can work as a Layer 2 or Layer 3 switch. While the Linux bridge only behaves like a Layer 2 switch.

IGMP snooping is the process of listening to Internet Group Management Protocol (IGMP) network traffic to control delivery of IP multicasts. Network switches with IGMP snooping listen in on the IGMP conversation between hosts and routers and maintain a map of which links need which IP multicast transmission. So if you use Linux to bridge wireless and wired networks (usual scenario for home LANs) and you subscribe to a multicast group from one of the wired clients, the wireless will be hogged too. Luckily, starting from 2.6.34, the kernel has IGMP snooping feature for the software bridges (disabled by default in OpenWrt) which should prevent Jul 21, 2020 · Linux - Networking: 9: 07-26-2013 04:30 AM: bridge / qemu - bridge is natting multicast traffic: eantoranz: Linux - Networking: 1: 12-31-2012 06:46 PM [SOLVED] To bridge or not to bridge (network) Adol: Linux - Newbie: 2: 02-03-2012 09:03 AM: LXer: RC6 To Be Flipped On For Sandy Bridge, Ivy Bridge: LXer: Syndicated Linux News: 0: 12-11-2011 06 Let me address the question of why I decided to put a DNS server (Pihole) exposed to the internet (not fully open but still). I needed/wanted to set up an Umbrella/NextDNS/CF type DNS server that’s publicly accessible but secured to certain IP addresses.

There are multiple network modes that can be used in setting up LXC. By default, the lxc-oracle template script sets up networking by setting up a veth bridge. In this mode, a container obtains its IP address from the dnsmasq server that libvirtd runs on the private virtual bridge network (virbr0) between the container and the host.

Mar 14, 2018 · Hello, I would like to ask if there is a way to block all multicast traffic coming to specific bridge in a Proxmox node. We can accomplish this at the moment with switch settings and acl. But a node level configuration would be more efficient and "dummy" for all clusters regardless networking I am trying to set up a Linux bridge with 2 ethernet interfaces and cannot get it to work correctly. I am using Gentoo Linux and thought it would be quite easy but I end up having trouble getting packets go through the bridge. All of that is virtualized under Hyper-V is that matters for anything (but I doubt it). Here goes my configuration.