Re: very confused with multicast..help [7:4133]
In article , Susan Stone wrote: 1) You need a client that will join/listen to IP multicast. I know Cisco typically uses a video steaming technology to demonstrate this. 2) This is where the server portion of the software comes into play. Hopefully some others will be able to give you specific softwares that use multicast as I've never looked into packages for this. 4) Multicast is useful when you need to send traffic to multiple hosts, but not all in a network. It uses less bandwidth than unicast and doesn't interrupt all hosts like broadcast traffic does. With technologies like CGMP, the traffic doesn't even have to be forwarded out all switched ports. Hi.. I am very confused about multicast, May I ask questions as below 1)How to make the Windows PC or unix host join a multicast group let's say 224.0.0.9 2)How to send a multicast traffic or how to test the mulitcast work? 3)I have a WAN router which has joined multicast 224.0.0.2/5/6, may I know why it should be a multicast group? for what purppose normally. I know 224.0.0.2 is for all routers, 5 is for OSPF, 6 for OSPF designate router. But whether it is a default setting or we have to make it join group FastEthernet0/0 is up, line protocol is up Internet address is 50.100.160.2/22 Broadcast address is 255.255.255.255 Address determined by non-volatile memory MTU is 1500 bytes Helper address is not set Directed broadcast forwarding is disabled Secondary address 50.100.120.2/27 Secondary address 50.100.122.2/26 Multicast reserved groups joined: 224.0.0.2 224.0.0.5 224.0.0.6 4)Normally in what circumstance, we need to use multicast? _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=4147t=4133 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: very confused with multicast..help [7:4133]
Though there are a number of other vendors that produce video streaming systems, Cisco has the iptv product. With an IPTV server you can put S Video, or RCA input into a multicast (or unicast) stream, or you can use a unicast stream to 'seed' a multicast session onto your network. You can also use a content manager to provide a library of unicast video on demand titles. At my last employer we used IPTV to put some very impressive 1 MB+ video feeds onto the LAN. With CGMP everybody in the office could view CNN, or some other news satellite feed, on their desktops with full screen 30 fps quality. IPTV comes with it's own client viewer and java plug-in for web pages. Perhaps it was not the best thing from productivity, but it was cool to see the technology work. Now if I could just get that kind of video to may desktop at home. --David - Original Message - From: Larry Lamb To: Sent: Friday, May 11, 2001 2:04 AM Subject: Re: very confused with multicast..help [7:4133] In article , Susan Stone wrote: 1) You need a client that will join/listen to IP multicast. I know Cisco typically uses a video steaming technology to demonstrate this. 2) This is where the server portion of the software comes into play. Hopefully some others will be able to give you specific softwares that use multicast as I've never looked into packages for this. 4) Multicast is useful when you need to send traffic to multiple hosts, but not all in a network. It uses less bandwidth than unicast and doesn't interrupt all hosts like broadcast traffic does. With technologies like CGMP, the traffic doesn't even have to be forwarded out all switched ports. Hi.. I am very confused about multicast, May I ask questions as below 1)How to make the Windows PC or unix host join a multicast group let's say 224.0.0.9 2)How to send a multicast traffic or how to test the mulitcast work? 3)I have a WAN router which has joined multicast 224.0.0.2/5/6, may I know why it should be a multicast group? for what purppose normally. I know 224.0.0.2 is for all routers, 5 is for OSPF, 6 for OSPF designate router. But whether it is a default setting or we have to make it join group FastEthernet0/0 is up, line protocol is up Internet address is 50.100.160.2/22 Broadcast address is 255.255.255.255 Address determined by non-volatile memory MTU is 1500 bytes Helper address is not set Directed broadcast forwarding is disabled Secondary address 50.100.120.2/27 Secondary address 50.100.122.2/26 Multicast reserved groups joined: 224.0.0.2 224.0.0.5 224.0.0.6 4)Normally in what circumstance, we need to use multicast? _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=4162t=4133 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: very confused with multicast..help [7:4133]
In order to make your PC or Unix workstation join a multicast group, you need an application that supports multicast running on the machine. A good test tool I use at work to generate and receive multicast traffic on a Unix host is MGEN/DREC. It is a free application developed by the Naval Research Lab (NRL) I believe. It can be downloaded from the internet. You can pick what address you want to send to, the packet size, the transmit rate, and some other parameters using the MGEN software. The DREC portion is the receiver and you set it to the address you want to receive traffic from. Certain protocols, such as OSPF, use multicast in their operation. If a router is running OSPF, it will automatically join multicast groups so that it receives data being sent by the protocol on that address. The router may also register as a source if it has multicast traffic to send. Susan Stone wrote: Hi.. I am very confused about multicast, May I ask questions as below 1)How to make the Windows PC or unix host join a multicast group let's say 224.0.0.9 2)How to send a multicast traffic or how to test the mulitcast work? 3)I have a WAN router which has joined multicast 224.0.0.2/5/6, may I know why it should be a multicast group? for what purppose normally. I know 224.0.0.2 is for all routers, 5 is for OSPF, 6 for OSPF designate router. But whether it is a default setting or we have to make it join group FastEthernet0/0 is up, line protocol is up Internet address is 50.100.160.2/22 Broadcast address is 255.255.255.255 Address determined by non-volatile memory MTU is 1500 bytes Helper address is not set Directed broadcast forwarding is disabled Secondary address 50.100.120.2/27 Secondary address 50.100.122.2/26 Multicast reserved groups joined: 224.0.0.2 224.0.0.5 224.0.0.6 4)Normally in what circumstance, we need to use multicast? _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=4167t=4133 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
very confused with multicast..help [7:4133]
Hi.. I am very confused about multicast, May I ask questions as below 1)How to make the Windows PC or unix host join a multicast group let's say 224.0.0.9 2)How to send a multicast traffic or how to test the mulitcast work? 3)I have a WAN router which has joined multicast 224.0.0.2/5/6, may I know why it should be a multicast group? for what purppose normally. I know 224.0.0.2 is for all routers, 5 is for OSPF, 6 for OSPF designate router. But whether it is a default setting or we have to make it join group FastEthernet0/0 is up, line protocol is up Internet address is 50.100.160.2/22 Broadcast address is 255.255.255.255 Address determined by non-volatile memory MTU is 1500 bytes Helper address is not set Directed broadcast forwarding is disabled Secondary address 50.100.120.2/27 Secondary address 50.100.122.2/26 Multicast reserved groups joined: 224.0.0.2 224.0.0.5 224.0.0.6 4)Normally in what circumstance, we need to use multicast? _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=4133t=4133 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
