Hello all, Ages ago, I posted a query regarding multicast and pim NBMA mode on frame. Well, finally today, I got back to doing another test on proctorlabs kit...and the suggested solution STILL did not work! Again, this was a homemade lab: TOPOLOGY------------- classic WB 2 topology of R2/R4/R5 being a frame hub and spoke, R2 hub. Pim set up on all routers and auto-rp RP and mapping agent live behing R5. R8 (RP) -> R7 (Mapping agent) -> R5 -> DLC502 -> R2 -> DLCI 204 -> R4. All interfaces set to PIM SM. All can see each other as neighbours. R2 set to be PIM DR on frame (suggestion from last time I tried this!). R2 set for pim NBMA mode on its frame interface. SYMPTOMS-------------- R8 can see rp mapping, R7 can see RP mapping, R5 can see RP mapping, R2 can see RP mapping, R4 cannot. All these were configured: OSPF in point-to-multipoint mode on frame and broadcast on LANs. Full IP connectivity within this small cloud.PIM NBMA mode on R2 frame interfaceR2 PIM DR priori ty 0f 255, 0 on R4 and R5. Debug ip mpacket details and debug pim auto (forget exact syntax but it is the auto-rp debug) Results: R4 is not receiving ANY multicast whatsoever. R2 is receiving auto-rp info, but is not sending back out its frame interface again to R4. My solution was to configure a GRE tunnel from R2 to R4, move PIM onto that adjust static mroute accordingly. Yes I know, could have used PPPoFr but that was more typing! However, this to me seems like a frig. I thought the whole point of pim NBMA mode is that is...sort of...acted like "no ip split-horizon" does for routing, and R2 should advertise the RP and mapping agent advertisements back out its frame interface again. It just did not do this..... Is my understanding flawed here, or have a stumbled across one of those "a reload should fix that" things? Configs below: R2-- ip multicast-routingip pim autorp listener int ser0/1/0encap frameno frame inverseip address 10.1.1.1 255.255.255.0frame map ip 10.1. 1.1 204 broadframe map ip 10.1.1.4 204frame map ip 10.1.1.5 205 broadip ospf net point-to-multipointip ospf 1 area 0ip pim sparse-modeip pim nbma-modeip pim dr-priority 255 R4-- ip multicast-routingip pim autorp listener int ser0/0/0encap frameno frame inverseip address 10.1.1.4 255.255.255.0frame map ip 10.1.1.1 402 broadframe map ip 10.1.1.4 402frame map ip 10.1.1.5 402ip ospf net point-to-multipointip ospf 1 area 0ip pim sparse-modeip pim dr-pri 0 int f0/0ip address 10.1.4.4 255.255.255.0ip pim sparse-modeip ospf 1 area 0 R5--- ip multicast-routingip pim autorp listener int ser0/1/0encap frameno frame inverseip address 10.1.1.5 255.255.255.0frame map ip 10.1.1.1 502 broadframe map ip 10.1.1.4 502frame map ip 10.1.1.5 502ip ospf net point-to-multipointip ospf 1 area 0ip pim sparse-modeip pim dr-prior 0 int f0/0ip address 10.1.5.5 255.255.255.0ip ospf 1 area 0descr RP and Mapping agent live out here..... Regards, George. _______________________________________________ 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
