Could the other 3 be keepalives. Don't know what the application is. Is your receiver sending to the group as well? Could be the primary address is advertising everything via an election process. The others are sending keepalives, if the primary goes away, then the next is elected based on some factor.
David -- http://dcp.dcptech.com -----Original Message----- From: Riccardo S [mailto:[email protected]] Sent: Monday, December 17, 2012 12:52 PM To: David Prall; [email protected] Subject: R: RE: [c-nsp] Same multicast flow with multiple source But as you see it seems that the application is the same (same group and same number of pkts received)... At least for three sources... Tks sent with android David Prall <[email protected]> ha scritto: >This is why it is called Any Source Multicast (ASM). A number of >applications use the same group for discussions. Cisco's old IP/TV >distributed over one group, then had a second group for feedback. So as you >typed in a question it was sent to everyone. > >David > >-- >http://dcp.dcptech.com > > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of Riccardo S >Sent: Monday, December 17, 2012 12:03 PM >To: [email protected] >Subject: [c-nsp] Same multicast flow with multiple source > > > > >I built up a PIM connection to a new multicast >provider and I see this provider is sending the same mcast flow with some >different sources: > > -------------- > >xx#sh ip mroute 224.0.1.114 count > >IP Multicast Statistics > >858 routes using 542426 bytes of >memory > >705 groups, 0.21 average sources per >group > >Forwarding Counts: Pkt >Count/Pkts(neg(-) = Drops) per second/Avg Pkt Size/Kilobits per second > >Other counts: Total/RPF failed/Other >drops(OIF-null, rate-limit etc) > > > >Group: 224.0.1.114, Source count: 4, >Packets forwarded: 9106926, Packets received: 9106926 > > >RP-tree: Forwarding: 31/0/37/0, Other: 31/0/0 > > >Source: 172.16.89.2/32, Forwarding: 10994/0/30/0, Other: 10994/0/0 > > >Source: 172.16.89.6/32, Forwarding: 10994/0/30/0, Other: 10994/0/0 > > >Source: 172.16.89.3/32, Forwarding: 9073913/27/299/63, Other: 9073913/0/0 > > >Source: 172.16.89.5/32, Forwarding: 10994/0/30/0, Other: 10994/0/0 > >--------------- > > > >Questions: > >1) From a conceptual point of view is it >correct they send same feed with a lot of different sources ? Usually I >always >saw one A feed (with sourceA,GroupA) and one B feed (with sourceB,GroupB)... > >2) Which can be the reason whether they >send one flow with different pkt size (299Byte) and all the other with >30byte >pkt size ? > >3) Since on my CPE I have static >join towards the group in this way I'll get the flow four times with >bandwidth >exceeded ? Is there a method to us only one flow if identical to the others >? > > > >Tks > > >_______________________________________________ >cisco-nsp mailing list [email protected] >https://puck.nether.net/mailman/listinfo/cisco-nsp >archive at http://puck.nether.net/pipermail/cisco-nsp/ > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
