Is Real Broadcasting on the Internet Possible?

broadcastinternetmulticastrouting

Am sorry if my question is silly. But I want to clear that i doesn't mean just playing audio or video from a remote server.I am asking about conventional broadcasting as exists in Television and Radio (one transmitter{here i mean transmitting once unlike transmitting data differently for different number of receivers.}. As of my knowledge if I start streaming live on any Internet Service(Say You Tube ), it will start sending me data over internet like a point to point communication, even if I open the same video in another tab my browser will create a new connection with YouTube server and that will start a new point to point communication.
But what if we place server or router @ home b/w receiver and transmitter which gives a unique url to broadcast related communication over internet and every time when another receiver{connected after router} requests that content the router will provide access to a copy of that content
I have just asked this because a HYBRID internet could me more faster and the service like live streaming that sucks majority of bandwidth of internet and for which internet is not a right protocol could be done over above mentioned channel.By labelling communications as PUBLIC , PRIVATE and BROADCAST

Plz correct me if i have choosen wrong community

Best Answer

I don't think you really understand that the Internet is just a collection of many ISPs which connect to other ISPs. Each ISP has its own policies. Also, IP has a single source and a single destination address for each IP packet. Actual broadcasts, from the perspective of IP (broadcast destination address), are restricted to a single broadcast domain, and a broadcast cannot cross a router.

IP does have multicast which is used with a single source, multiple receivers. Like broadcast, multicast is normally restricted to a single broadcast domain. To get around that, multicast routing was developed, but it is different than regular IP routing.

With multicast, each and every router in a path from source to destination must be configured for multicast with the same multicast policies. Also, you would end up forcing ISPs to either always carry multicast traffic for which it may have no users (wastes a lot of precious bandwidth and the ISPs will never agree to this), or the ISPs will need to purchase and maintain special equipment just for the multicast traffic.

Related Solutions

Quagga OSPF – DR/BDR Mismatch and Losing Routes

To answer your question directly, this is expected behavior by OSPF and not a bug in Quagga.

So first, let's take a look at the DR/BDR section of the RFC.

Designated Router
    The Designated Router selected for the attached network.  The
    Designated Router is selected on all broadcast and NBMA networks
    by the Hello Protocol.  Two pieces of identification are kept
    for the Designated Router: its Router ID and its IP interface
    address on the network.  The Designated Router advertises link
    state for the network; this network-LSA is labelled with the
    Designated Router's IP address.  The Designated Router is
    initialized to 0.0.0.0, which indicates the lack of a Designated
    Router.

Backup Designated Router
    The Backup Designated Router is also selected on all broadcast
    and NBMA networks by the Hello Protocol.  All routers on the
    attached network become adjacent to both the Designated Router
    and the Backup Designated Router.  The Backup Designated Router
    becomes Designated Router when the current Designated Router
    fails.  The Backup Designated Router is initialized to 0.0.0.0,
    indicating the lack of a Backup Designated Router.

If the BDR field in the Hello packet header is set to 0.0.0.0, it means you do not have a BDR elected.

In your case this is because you have your other router set to a priority of 0, this makes the router ineligible to become a BDR (this is why you see "DROther" and not "BDR"). You just need to set the priority on your other router to something that isn't 0.

Here is the other piece from the RFC for some more context.

Router Priority
    An 8-bit unsigned integer.  When two routers attached to a
    network both attempt to become Designated Router, the one with
    the highest Router Priority takes precedence.  A router whose
    Router Priority is set to 0 is ineligible to become Designated
    Router on the attached network.  Advertised in Hello packets
    sent out this interface.

https://www.ietf.org/rfc/rfc2328.txt

Multicast vs Broadcast – Understanding Point-to-Point and Multiaccess Networks

When you discuss a point-to-point link, you are usually referring to a physical link that exists only between two devices.

A point-to-point transmission is a transmission from one device to a single other device. This may or may not cross point-to-point links, but that is not a requirement. A unicast is essentially the same idea in that it means the packet is addressed to a single recipient.

Contrast a broadcast or mutiaccess medium with the idea of a point-to-point link. A broadcast medium allows multiple devices on a single link. Each device looks at the destination address of a packet sent on the medium to see if it belongs to him. This doesn't directly relate to the 'cast designations since those are about how a packet is addressed rather than the medium on which it is sent.

The 'cast references refer to how the packet is addressed, not the medium on which the packet travels. A unicast is addressed to a single recipient, while a broadcast is addressed to every recipient. A multicast is addressed to every recipient which has subscribed to the multicast group (the destination address of the packet).

Best Answer

Related Solutions

Quagga OSPF – DR/BDR Mismatch and Losing Routes

Multicast vs Broadcast – Understanding Point-to-Point and Multiaccess Networks

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