Linux Route Multicast Multiple Interfaces

2) Netlink interface to request information about ciphers registered with the kernel crypto API as well as allow configuration of the kernel crypto API. Multiple IP addresses on one Interface. All existing Linux distributions including CentOS supports IP aliasing. I can add one OK, but if I try to add a second, the entire network connection stops working until I bring down the 2nd card. Note that virtual hosts can support multiple Apache servers with a single IP address. netstat -rn The Linux specific command will show the same information in a slightly different format. A Linux machine -or virtual machine-, can require having multiple ethernet cards, each on a separate LAN. This time we will talk about how to add a static route on RHEL7 Linux. Use this for stricter control over which interface the firewall uses rather than the interface in the route table for the next hop of this route. To bridge traffic between two or more Ethernet interfaces on Linux. Enabling multicast routing initially does not route any data, due in fact that the default configuration leaves all router interfaces without multicast routing in their configuration. Making VLC multicast work with multiple network cards Having recently attached my new ADSL router to a Linux box, this now gives me a backup line to the internet should the main line go down. 0 dev eth0 This is an obscure one documented so people know how to do it. We cannot always install a NIC for each IP address required. So our topic of interest is, how to tell our linux machine to insert that 802. Link aggregation offers an inexpensive way to set up a high-speed backbone network that transfers much more data than any one single port or device can deliver. On his machine, whenever he connects the wired interface, NetworkManager - besides updating the default route - sets the wired interfaces metric lower than the wireless one. A Quick Introduction to Linux Policy Routing 29 May 2013 · Filed in Education. Practically, what you get is a virtual sub-interface whose name is the name of the main interface merged to the VLANID (separated by a point). igmp proxy needs to be configured with the client facing interface as "downstream" you can have multiple downstream interfaces, but at least one is required. Task 2 Configure R1 and R2 in such a way that they do not form PIM adjacency over Frame-Relay cloud, but IGMP join messages must be sent to R1 and the multicast traffic from from VLAN 14 should be sent via WAN connection to the clients in VLAN 26. This is in contrast to normal, or unicast, UDP, where each datagram has a single IP as its destination. I use it quite a lot at both home and work, and greatly enjoy having insight into what my systems are doing at any given moment. Configuring Network Interfaces. This trick should work on all Debian-based Linux distros, including Ubuntu. How to add permanent static routes in Ubuntu Linux. It meets all requirements to send, receive and act as a router (mrouter) for multicast datagrams. Determining which value to use for the interface can sometimes be confusing. The configuration roadmap is as follows:. You can write your own networkd units to replace or override the units created for each platform. set protocols static interface-route 10. Read the Vyatta policy about the Community Edition. 0 netmask 240. Interface aliasing allows one interface to have multiple IP addresses. Step 4: Add Static Multicast Routes. The source address and the previously used interface in the network are crucial for forwarding the data stream. However, it is possible to create a network environment where some exchange Gateway traffic is located on one multicast, while other traffic is located on another (a multiple multicast environment). For details about multicast and wireless links. This will determine the bonding module options for our. For the same reason, multicast packets will probably leave your host on the interface with the default route if it is specified. A multicast packet received on an interface is flooded unconditionally to all interfaces on the forwarding domain, except the incoming interface. Some of you might wondering why would we assign multiple IP addresses to single Network card. To avoid asynchronous routing and ensure that traffic to each network is sent via the correct interface (instead of to the default gateway) I have defined an interface route. Show network interfaces Linux. route add 239. The NAT cloud is just a cloud to the ‘virbr0’ bridge. By configuring any cast RPs with the same IP address on multiple multicast switches (primarily on the loopback interface), the PIM-SM limitation of only one RP per multicast group is relaxed. So having multiple Gateway IP's in Windows usually makes it "wig out" and trouble communicating outside the subnet. ternal PHYs, Linux can manage the external PHYs and asso-ciate them to the Linux slave interface representing the switch ports. Many Listeners. If you would like to set up IP aliasing on the fly, there are two ways to do it. The following are code examples for showing how to use socket. 50 network interface e1000g1 - 192. Ifconfig is used to configure the kernel-resident network interfaces. So to counter act this issue, with Linux, you can setup additional routing tables, so when we setup a routing table for each interface we have, we can allow the IP address on that interface to have its own default route. The multicast-router-interface documentation seems to suggest that I’d configure that on an interface facing a multicast router. For example, each LAN (located at different offices) is connected to HQ IDC (Internet data center) using single T1/LL/Wan. Assuming the eth0 network interface is to act as that outgoing route (your application can instruct the kernel to send its datagrams using a different interface if needed), you'll need to use: route add -net 224. Shift-click to select multiple items. Linux can support multiple network devices. If making use of multiple tunnels, OpenVPN must have a way to distinguish between different tunnels aside from the pre-shared-key. You may have to register before you can post: click the register link above to proceed. They are also unaware of the router specified for their own subnet. Multicast uses IGMP to join these groups and there is no way to join a group manually. Found few threads, saying i have to change multicast interface address in VHost. identical multicast route on multiple interfaces We need a multicast route of 239. 30/27 Your router eth1 is: ip addr add 1. These are just a few of the more than 1,000 Linux commands that are available. If you want to monitor or modify any. Hi all, this week I have to configure IPv4 multicast on my campus lan, first as usual I read this cisco doc: Cisco IOS IP Multicast Configuration Guide, Release 12. In some cases need 2 or more separate IP address for high availability solutions, multiple web deployments or to separate the management ,administration and public traffic. The following are code examples for showing how to use socket. 4 The IPv6 part of netfilter is called via the separate command ip6tables. As soon as I add the (needed) second interface, VLC does not find the multicast stream anymore. Since networking hardware such as switches, hubs, and bridges operate on Ethernet frames, they are unaware of the higher layer data carried by these frames [9]. This is a simple way to generate multicast traffic and ensure a member of the multicast group actually receives it. The device names are numbered and begin at zero and count upwards. Configure the GRE tunnel. Note that virtual hosts can support multiple Apache servers with a single IP address. They are using a Cisco router, if that matters. IGMP is used between the hosts and the. Its arguments are as follows:. If you are unsure, then as root type ip route ls at the command line. of the kernel making decisions as to which route, out of multiple present routes, a packet should take. I found how to send a file to whole user in multicast, but I want to send a file to specific user. This tutorial I will explain how to modify, remove or add static routes via gateway for networks or hosts using route add command in Linux. SSH Solution: Configure Gateway Routing or setting up multiple default routes for each interfaces Initially when you connect different links/network (regardless it's in the same subnet or […]. RTM_NEWADDR, RTM_DELADDR, RTM_GETADDR Add, remove or receive information about an IP address associ‐ ated with an interface. 0 netmask 240. This document provides a simple client/server example for setting up a multicast application in C#. • HTTP: Stream by using the HTTP protocol. This is in contrast to normal, or unicast, UDP, where each datagram has a single IP as its destination. You would add a second route to network 10. In the case of sparse mode, a Rendezvous Point (RP) is to be configured. Network Configuration. P - Pruned Route has been pruned. So, bridge is probably acting ok. Its a pub-sub model for ip packets and is excellent for use in communicating to a broad membership. INTERNET-DRAFT Source-Specific Multicast H. In this article, we explore the process of optimizing Linux for the best packet-forwarding performance by exploiting symmetric multiprocessing (SMP) and Ethernet interfaces with multiple queues. 2, and that system will determine how. Juniper EX simple multicast router (PIM & IGMPv2) In next few lines I will show you how to set Juniper EX4200 switch with Junos version 12. Every Linux distribution has its own special way of configuring IP addresses and static routes. Zeroshell is available for x86/x86-64 platforms and ARM based devices such as Raspberry Pi. The Linux kernel configuration parameter to activate this is named net. S - Sparse Entry is operating in sparse mode. but still I wasn't getting any stream on VLC client. In this tutorial I will show you how to configure two bridge network, br0 and br1 on your host. It can be used as an alternative to dynamic multicast routers like 'mrouted' in situations where (only) static multicast routes should be maintained and/or no proper IGMP signaling exists. It could be argued that multicast does not always remove unnecessary processing overhead: The IP-multicast to ethernet-multicast address mappings are not one to one and coarseness of multicast filters on various network cards, particularly at the lower end, may lead to unnecessary CPU interrupts caused by irrelevant multicast traffic. Internet Standards. The configuration roadmap is as follows:. Multiple interfaces on a PE router can be associated with a single VRF if all of these sites participate in the same VPN. In AWS we can create additional ENI NIC and can attach to instance. 2 — all multicast routers group-> 224. So these commands should be working on the popular distributions like Arch Linux, CentOS, Debian, Gentoo, RHEL, and Ubuntu. Ifconfig is used to configure the kernel-resident network interfaces. 3 ethX (where X is the interface number used to transmit/receive multicast traffic) Run the command shown below. UNIX Socket FAQ. AWS EC2 instance by-default will have one ENI with private / public IP address. Currently, the most popular multicast routing protocol is PIM-SM (Protocol-Independent Multicast--Sparse Mode). Cisco Networking ch 5-8. So to counter act this issue, with Linux, you can setup additional routing tables, so when we setup a routing table for each interface we have, we can allow the IP address on that interface to have its own default route. If not sure, you can use a multicast ping, for example for linux it will be ping 224. Using more than one string in static_routes creates multiple static routes. Now just run "make" and "make install" in the Linux IGD directory. Configure a route-based IPsec tunnel. When you configure an instance with multiple interfaces, each interface belongs to a different VPC network. Here is how to bind multiple IP addresses to a single network interface on CentOS. Is the wireless LAN a card inside the PC or an external device? I suspect that it is inside the PC and you are seeing the ICMP reaching the LAN interface bu tnot being forwarded through the router. Update: I forgot to show the IGMP messages one would see when starting a multicast listener. SMCRoute is a command line tool to manipulate the multicast routes of the Linux kernel. And some keys. Traditional multicast protocols for wireless networks assume that each node is equipped with one interface. Much like broadcast, there are special addresses designated for. Many enterprises use OSPF version 2 for their internal IPv4 routing protocol. Linux networking IP port aliasing tutorial. Perform these configurations to enable multicast routing on a router: Issue the ip multicast-routing command globally on the router. Linux has a native support for multicast routing but it needs to be managed by an userspace application which statically or dynamically manages routes. When multiple same routes are in a kernel routing table, the Linux kernel chooses one with lower metric. But if you configure a gateway address on both NIC's in Windows and apply a static route (via command line) that applies to one of the NIC's, would this still be a problem?. An Azure Virtual Machine (VM) has one or more network interfaces (NIC) attached to it. Make sure you have iproute2 installed. This is in contrast to normal, or unicast, UDP, where each datagram has a single IP as its destination. The Linux kernel configuration parameter to activate this is named net. See how you can emulate that Docker feel by converting a Linux box into a router for your Using a Linux Box as a Router I need to route traffic from one Interface to another using routing. On solaris for example, if you have multiple interfaces and you set multiple defaultroutes, the kernel re-routes incoming requests (coming. 1 interface on the router. Linux is, of course (you doubted it?), full Level-2 Multicast-Compliant. Linux: Configuring Multiple Default Routes in Linux October 26, 2011 Assume you have a Linux system with more than one network interface card (NIC) — say eth0 and eth1. For more information, refer to KB19371 - [SRX] GRE Configuration Example. g network interface e1000g0 - 192. But you can have as many default or other routes as you would like. Linux does allow the same address to be configured on multiple interfaces and it has valid use cases. One of the most widely used. Using multiple NICs on the same subnet is the #1 cause of connectivity issues on multi-NIC systems. The interface's media-specific MIB must define the bit and byte ordering and the format of the value of this object. How to Add Multiple Routes in Linux Using ip Command Examples Apart from the default route, you can also configure additional routes. network(5) for more options. Zeroshell is a Linux based distribution dedicated to the implementation of Router and Firewall Appliances completely administrable via web interface. Problem Description. 0 netmask 240. Multicast IP Routing protocols are used to distribute data (for example, audio/video streaming broadcasts) to multiple recipients. 2 to act as PIM dense-mode router. Security concern. Service Instance: The Service Name on which Multicast traffic will be sent. Using multicast, a source can send a single copy of data to a single multicast address, which is then distributed to an entire group of recipients. In AWS we can create additional ENI NIC and can attach to instance. Caveats 10. This document describes the Linux version of route. The receivers can be single receivers or can be part off a multicast group. Address Resolution Protocol (ARP) exists solely to glue together the IP and Ethernet networking layers. Chances are the words you're reading right now had to pass through your home's router on their way to your screen. Router Interface = 2. Make sure you have iproute2 installed. Hi all, Can anyone explain why there is a difference between 239. MultiBootUSB is a cross platform software written in python which allows you to install multiple live linux on a USB disk non destructively and option to uninstall distros. You would add a second route to network 10. If the destination MAC is a local one, Linux will route or deliver the encapsulated IP packet. 2 is that when there are multiple downstream interfaces, multicast traffic generated in one of the downstream interfaces should be sent to all subscribers on the other downstream interfaces. Alternatively, just type the following command in Linux: route. It is also possible that more than one process joins the same multicast group on the same interface. In some cases need 2 or more separate IP address for high availability solutions, multiple web deployments or to separate the management ,administration and public traffic. Although on Linux it uses the wording "an appropriate interface is chosen by the system" which may not mean the default interface but I am not sure. Would it make sense to stand on a stage and give the presentation or sit with each individual and repeat the presentation multiple times?. This had been superseded by the ip command. How to connect two network interfaces on the same subnet? In our environment, there are three bonding devices connected with the same segment. 0 netmask 240. It meets all requirements to send, receive and act as a router for multicast datagrams. In simple terms packet forwarding enables packets to flow through the Linux box from one network to another. No data on this Windows 7 box. set action accept. Typically the multicast router makes routing decisions based on the source and. Certain Cisco Meraki switches support multicast routing; specifically, Protocol Independent Multicast - Sparse Mode (PIM-SM). Allow more band width usubg multiple nics. sudo route -nv add -net 228. To enable the multicast policy. For a number of reasons I needed to make the switch to CentOS. The gateway for this route is Router 1 and it has the IP address 10. The receivers can be single receivers or can be part off a multicast group. After the initial flood, the switch intercepts IGMP traffic sent between an IGMP router and hosts wishing to join a multicast group. Enter this command:. An application program can send or receive multicast datagrams by using the socket() API and connectionless SOCK_DGRAM type sockets. OSPF has gone through changes over the years and the protocol has been adapted to work with IPv6. Sophos iView v 02. In this article I explain how the Linux kernel manages multicast traffic and how it is possible to interact with it by simply patching some kernel code. The bridge. EDIT: I also disabled RP_FILTER. In the case of sparse mode, a Rendezvous Point (RP) is to be configured. x interface, this object normally contains a MAC address. Multiple Multicasts. An Ethernet bridge is a device for forwarding packets between two or more Ethernets so that they behave in most respects as if they were a single network. This means that IGMP traffic will be forwarded on a specific port only if an IGMP host or multicast router is connected to the port. How to create a Linux virtual machine in Azure with multiple network interface cards. This time we will talk about how to add a static route on RHEL7 Linux. They are also useful in stub networks (i. This, of course, significantly impacts a router's next-hop (path) decision. igmp proxy needs to be configured with the client facing interface as "downstream" you can have multiple downstream interfaces, but at least one is required. Syntax: redir6 interface victim-ip target-ip original-router new-router [new-router-mac] [hop-limit] Implant a route into victim-ip, which redirects all traffic to target-ip to new-ip. Before you can do any multicast routing, you need to configure the Linux kernel to support the type of multicast routing you want to do. Due to issues with session tracking, particularly as it involves forwarding a single packet on multiple interfaces, NAT lookups are modified to ignore multicast packets. u got 2 interface with eth0 & eth1 name. Kuznetsov who also wrote the IPv6 and IPv4 routing code for Linux 2. One reason for this can be to separate network traffic; for example, all management traffic can be routed to one NIC, while the another NIC handles all other traffic. A straightforward approach is to ping the all-nodes multicast address as depicted in Figure 1. Multicast has become a buzzword more than once in history. On Linux I can say: sudo ifconfig lo multicast sudo route add -net 224. 1q vlan info in the ethernet frame that goes out. A Linux machine -or virtual machine-, can require having multiple ethernet cards, each on a separate LAN. In unicast, the Internet protocol methods, such as. Usually the purpose is to connect an interface to several IP subnetworks. ip link and ip addr do what ifconfig did and ip route does what route did. However, the port cannot be changed, so we need multiple IP addresses. Typically the multicast router makes routing decisions based on the source and. 0 netmask 240. In this example, the multicast policy only applies to the source port of WAN1 and the destination port. The option value is the 8-byte packed representation of the multicast group address followed by the network interface on which the server should listen for the traffic, identified by its IP address. Problem Description. adding persistent static routes on ubuntu Submitted by admin, on February 1st, 2015 When you need to access networks located on a different network segment, you need to have a route set up so the PC knows how to get to the other network segment. An Anycast Locator (ALOC) identifies the location of multiple interfaces within a Thread partition. Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Multiple network interfaces, each with an IP address in the same subnet; Issue. Rule 2: Avoid Assigning Multiple NICs in the Same Computer to the Same Subnet. Summary: In this article I have demonstrated how to configure TMG 2010 Firewall with Multiple NICs in Enterprise Network with network diagram. Linux: Configuring Multiple Default Routes in Linux October 26, 2011 Assume you have a Linux system with more than one network interface card (NIC) — say eth0 and eth1. Click Apply to apply the changes. L - Local The router itself is a member of the multicast group. igmp proxy needs to be configured with the sonos facing interface as "upstream". It did not change. 0 network to the 192. Linux can support multiple network devices. This interface is known as the mrouter port or multicast router port. I would like to make sure that multicast only goes on vlan 239, and no other vlan. 4 -I eth1 -t 10 (note the -t option: it is the ttl which will be 1 by default (AFAIK)) 4) Check out your multicast cache on EX4200: [email protected]# run show route table inet. Understand the basics of Linux routing. Keepalived is a Linux package that uses VRRP to deliver high availability among Linux servers. C - Connected A member of the multicast group is present on the directly connected interface. Typically the multicast router makes routing decisions based on the source and. I have a server with two network interfaces, eth0 and eth1. 0 GNS3 is able to connect to Linux bridge interfaces. 1 on both eth4 and eth5. Connecting multiple interfaces with DHCP. The legacy net-tools are not capable of providing modern functions like having multiple IP addresses on an interface (yes, I know you can make alias interfaces with ifconfig but with ip addr add you don't need to make an extra interface). If you are having two network interface cards or some other component that connects you to the internet along with a network interface card installed in your ubuntu system, it can be transformed into an immensely powerful router. 250 in terms of ping reply? I am seeing no difference of 2 multicast groups's routes and any configuration. Assuming the eth0 network interface is to act as that outgoing route (your application can instruct the kernel to send its datagrams using a different interface if needed), you'll need to use: route add -net 224. To route all all client traffic through the VNS3 overlay, see this FAQ guide. It is also possible that more than one process joins the same multicast group on the same interface. A straightforward approach is to ping the all-nodes multicast address as depicted in Figure 1. While some OSs may be able to gracefully handle the presence of multiple NICs on one subnet, others may mistakenly attempt to send packets out of the wrong interface. Enter the IP address of the multicast group (in the 224. When configuring a Linux host with multiple interface, each with its own default gateway, ensuring route symmetric is a bet challenging for any given pair of endpoint. 5 is a vlan interface (vlan5) that FreeSWITCH is bound to and it has an IP address of 192. This had been superseded by the ip command. Remove the "#" from the. 2) Netlink interface to request information about ciphers registered with the kernel crypto API as well as allow configuration of the kernel crypto API. Ł In a conventional shared broadcast LAN using switches that have no multicast smarts, the traffic is sent to all hosts. 4/24 dev eth4 but I do not. I can no longer sign into my router interface page, and I don't want to reset in case there is evidence on there. Due to issues with session tracking, particularly as it involves forwarding a single packet on multiple interfaces, NAT lookups are modified to ignore multicast packets. Router configuration. eth1 => ISP router with public IP 205. Two ways to force an IGMP join By stretch | Monday, July 21, 2008 at 3:30 a. One scenario is setting up a bridge with multiple network interfaces, then using a firewall to filter traffic between two network segments. It listens for IGMP packets on tun0, joins/unjoins multicasts on eth1 and install. I try to use a Multicast Address and port like 224. Combine multiple audio interfaces by creating an Aggregate Device An Aggregate Device lets you use audio inputs and outputs from different devices at the same time with audio applications like Logic Pro X, GarageBand, MainStage, and most other Core Audio-compliant applications. The interface's media-specific MIB must define the bit and byte ordering and the format of the value of this object. Its arguments are as follows:. Previously we have talked about how to configure a default gateway on RHEL7 Linux. ACX Series,T Series,MX Series,PTX Series,QFX Series,SRX Series,vSRX,NFX Series. If you want to add a secondary IP address to a NIC already in use in Linux, and have that change only temporary. In such setups it may be useful to change the default identity of SMCRoute: smcrouted -I mrt1 -t 1 smcrouted -I mrt2 -t 2. Instant Configuration. eth0 has two sets of network details on the same interface and so a virtual interface (eth0:0) must be created to handle the second IP. the Ethernet and serial interfaces on your router. This surprised me as I was also expecting the receiver2 side to work. On my system (debian unstable), I can only receive multicast streams if I only have one network interface. On Unix-like operating systems, the route command displays or modifies the IP routing table. The term comes from the field of electrical engineering, where bandwidth represents the total distance or range between the highest and lowest signals on the. The ipv6 nd supress-ra setting ensures that zebra does not send routing advertisements without the admin explicitly enabling this functionality. Together with anycast and unicast , multicast is one of the packet types in the Internet Protocol Version 6 ( IPv6 ). They are using a Cisco router, if that matters. Multiple interfaces on a PE router can be associated with a single VRF if all of these sites participate in the same VPN. Assuming the eth0 network interface is to act as that outgoing route (your application can instruct the kernel to send its datagrams using a different interface if needed), you'll need to use: route add -net 224. Like a multicast, an anycast is an address assigned multiple interfaces on multiple nodes. How to route only specific subnet (source ip) to a particular interface? OS: Linux I know I can do easily by destination IP by using something like route add 1. Internet-Drafts are. Dense mode is configured because it is simpler to configure as sparse-mode. 0/8 dev eth0 By using wirehshark with igmp filter it is easy to check on which interface the igmp join traffic request is going out. So these commands should be working on the popular distributions like Arch Linux, CentOS, Debian, Gentoo, RHEL, and Ubuntu. You can use the Multicast Source Discovery Protocol (MSDP) to connect multiple PIM-SM multicast domains together, using the PIM-SM RPs. 0/16 next-hop-interface vtun1 Firewall policy can also be applied to the tunnel interface for local, in, and out directions and function identically to ethernet interfaces. The replication techniques are somewhat dependent upon the media used to transmit the data. But if you add other routes, or if the system learns about them dynamically, then any interface could appear more times. For details about multicast and wireless links. Feb 06, 2012 (Last updated on November 30, 2018). 0, which has its gateway as the border router, as follows:. This document describes the Linux version of route. Add static multicast routes to both Head Office and Branch Office. This is the normal source address used by an interface. In marketing usage, it is generally optimized for Ethernet LAN interfaces and may not have other physical interface types. You have built two or more network cards into one Linux system and each of these cards has its own default gateway. If the destination is not in this IP address range, it is forwarded to the default gateway (in this case, 192. Hi! I have a quick question. Finally, you need to set a default route for outgoing multicast datagrams. 0 netmask 240. Try out the world's first true cross platform multi boot live usb creator for free. Therefore, it is good to know which tools can be used to query these details in a generic way. Would you buy new one? No, It is not necessary! You can set multiple IP. 0 dev eth0 This is an obscure one documented so people know how to do it. 2, and that system will determine how. IP multicast is a process that transmits information from a source to multiple destinations with one data stream, rather than with multiple streams. Static routes are applied per VPC network, or to specific instances within a VPC network that match a configured network tag. The interface's address at its protocol sub-layer. 06/07/2018; 6 minutes to read +7; In this article. The two static routes are for reaching the 10. SMCRoute is a daemon and command line tool to manipulate the multicast routes of the Linux kernel. Because all WLCs have multiple physical Distribution ports, it is possible to assign all Dynamic interfaces and AP-Manager/Manager. 4 -I eth1 -t 10 (note the -t option: it is the ttl which will be 1 by default (AFAIK)) 4) Check out your multicast cache on EX4200: [email protected]# run show route table inet. The logical operation of the Sub-interface topology works exactly as the separate physical interface topology in the section. S - Sparse Entry is operating in sparse mode. 5 Performing a Multicast Connectivity Test. PIM VLAN (interface) configuration context37 Enabling multicast routing on the VLAN interface to which the CLI is currently set37 Specifying the IP address to use as the source address for PIM protocol packets outbound. This sets all of the class D (multicast) IP routes to go via "eth0". You can also push all of this to clients with a DHCP server, such as the excellent Dnsmasq , which provides name services, router advertisement, and network booting. In a single TT multicast LAN network, one multicast carries the traffic of all the required exchanges. Support for QoS and policy-based routing allows you to ensure optimal handling of the traffic flows. The interface's media-specific MIB must define the bit and byte ordering and the format of the value of this object. IP-MROUTE(8) Linux IP-MROUTE(8) NAME ip-mroute - multicast routing cache management SYNOPSIS ip mroute show [ [ to ] PREFIX ] [ from PREFIX ] [ iif DEVICE ] [ table TABLE_ID ] DESCRIPTION mroute objects are multicast routing cache entries created by a user-level mrouting daemon (f. Router that supports PIM, usually enabled, and multicast group -- 224. It is used at boot time to set up interfaces as necessary. IPROUTE2 Utility Suite Documentation. This solution is very inefficient in terms of network bandwidth utilization. 10 interface as its gateway.