Hi, I think BGP can help to work as base line for multicast traffic but hence you need PIM as well. Although BGP it self needs baseline static or IGP protocols to work properly! You migh have have to enable PIM for multicast traffic to work through out the routing hops and and any IGP! in my case i have enabled PIM with RP on my routers & Multi layer switches as well & have never seen RPF or RP failure! multicast works properly.EGP & IGP protocols are not the suitable choice since "protocol independent Multicast" PIM has been designed for multicast traffic.Look both BGP & IGP protocols takes decision on the base of destination address while multicast needs source base decisions! the nature and working nature of both dynamic protocols & multicast are different.
"Multicast RPF, typically denoted simply as RPF, is used in conjunction with a multicast routing protocols such as MSDP and PIM-SM to ensure loop-free forwarding of multicast packets. In multicast routing the decision to forward traffic is based upon source address and not on destination address as is the case with unicast routing. It does this by utilizing either a dedicated multicast routing table or alternatively the router's native unicast routing table" Regards Sheraz > Date: Sat, 26 Jan 2013 00:55:13 +0000 > From: [email protected] > To: [email protected] > Subject: [OSL | CCIE_RS] neighbor default-originate > > Hi All, > > > I am just trying to replicate Marko scenario from blog Multicast RPF > Failure: Recovery Using BGP. I have only changed addressing but other > details are the same. I have ipv4 unicast working and Pim enabled. > I have disabled pim between R3 and R4 on Fa interface and I can see RPF > failure. I set up MP-BGP and that is active as well but..command > neighbor x.x.x.x default-originate does not seem to send default route > to the neighbor. > > > R3 > > router bgp 34 > no bgp default ipv4-unicast > bgp log-neighbor-changes > neighbor 4.4.4.4 remote-as 34 > neighbor 4.4.4.4 update-source Loopback0 > ! > address-family ipv4 multicast > neighbor 4.4.4.4 activate > neighbor 4.4.4.4 default-originate > no auto-summary > > > R3#show bgp ipv4 multicast neighbors 4.4.4.4 | b def > Default information originate, default not sent > > > R4 > > > router bgp 34 > no bgp default ipv4-unicast > bgp log-neighbor-changes > neighbor 3.3.3.3 remote-as 34 > neighbor 3.3.3.3 update-source Loopback0 > ! > address-family ipv4 multicast > neighbor 3.3.3.3 activate > no auto-summary > no synchronization > exit-address-family > R4# > R4#show bgp ipv4 mul > > > R4#show bgp ipv4 mul s > Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down > State/PfxRcd > 3.3.3.3 4 34 61 59 3 0 0 00:34:57 > 0 > > > I guess I misinterpret something. Where is the problem? > > > THanks, > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
