Dear Members, With reference to a Multicast topic "Multicast on NBMA" I have dragged this mail into our forum from group study. I have tested multicast on NBMA before without tunnel and have just configured again. I have configured multicast on hub and spoke model and configured ospf (non-broadcast) with neighbor command.
Though I have successfully ping the group on other spoke but as someone mentioned in groupstudy that it's an issue of IOS. I would like to request to verify the following configuration and confirm that I am on right path. I do have noticed that auto RP was configured with "ip pim sparse-dense-mode". I will be grateful to you if you could clarify the following at your convenience Q1: Can we configure it with only Ip pim sparse-mode I have tested with ip pim sparse-mode and ip pim sparse-dense-mode and it works with both Q2: is there any issue with IOS 12.4 as compared with 12.3 Details are as follows: R2 = Hub Router. Configure auto-RP on Loop 0 R1 & R3 are spoke routers R3#ping 224.1.1.1 rep 15 Type escape sequence to abort. Sending 15, 100-byte ICMP Echos to 224.1.1.1, timeout is 2 seconds: Reply to request 0 from 131.1.123.1, 268 ms Reply to request 0 from 131.1.123.1, 272 ms Reply to request 1 from 131.1.123.1, 264 ms Reply to request 2 from 131.1.123.1, 260 ms Reply to request 3 from 131.1.123.1, 336 ms Reply to request 4 from 131.1.123.1, 212 ms Reply to request 5 from 131.1.123.1, 276 ms Reply to request 6 from 131.1.123.1, 136 ms Reply to request 7 from 131.1.123.1, 304 ms Reply to request 8 from 131.1.123.1, 232 ms Reply to request 9 from 131.1.123.1, 248 ms Reply to request 10 from 131.1.123.1, 260 ms Reply to request 11 from 131.1.123.1, 228 ms Reply to request 12 from 131.1.123.1, 212 ms Reply to request 13 from 131.1.123.1, 228 ms Reply to request 14 from 131.1.123.1, 244 ms R3# Configurations of Routers are as follows R1 Conf version 12.3 ip multicast-routing ! interface Loopback0 ip address 1.1.1.1 255.0.0.0 ! interface FastEthernet0/0 ip address 131.1.1.1 255.255.255.0 ip pim sparse-mode ip igmp join-group 224.1.1.1 duplex auto speed auto ! interface Serial1/0 ip address 131.1.123.1 255.255.255.0 ip pim sparse-mode encapsulation frame-relay ip ospf priority 0 serial restart-delay 0 no dce-terminal-timing-enable frame-relay map ip 131.1.123.1 102 frame-relay map ip 131.1.123.2 102 broadcast frame-relay map ip 131.1.123.3 102 no frame-relay inverse-arp ! router ospf 1 log-adjacency-changes network 1.1.1.1 0.0.0.0 area 1 network 131.1.1.1 0.0.0.0 area 1 network 131.1.123.1 0.0.0.0 area 0 ======================================= R2 configurations version 12.3 ! hostname R2 ! ip multicast-routing ! interface Loopback0 ip address 2.2.2.2 255.0.0.0 ip pim sparse-mode ! interface FastEthernet0/0 ip address 131.2.2.2 255.255.255.0 duplex auto speed auto ! interface Serial1/0 ip address 131.1.123.2 255.255.255.0 ip pim nbma-mode ip pim sparse-mode encapsulation frame-relay serial restart-delay 0 no dce-terminal-timing-enable frame-relay map ip 131.1.123.1 201 broadcast frame-relay map ip 131.1.123.2 203 frame-relay map ip 131.1.123.3 203 broadcast no frame-relay inverse-arp ! router ospf 1 log-adjacency-changes network 2.2.2.2 0.0.0.0 area 2 network 131.1.123.2 0.0.0.0 area 0 network 131.2.2.2 0.0.0.0 area 2 neighbor 131.1.123.3 neighbor 131.1.123.1 ip pim send-rp-announce Loopback0 scope 10 interval 10 ip pim send-rp-discovery scope 10 ! =================================== R3 configurations version 12.3 ! hostname R3 ip multicast-routing ! ! interface Loopback3 ip address 3.3.3.3 255.0.0.0 ! interface Ethernet0/0 ip address 131.3.3.3 255.255.255.0 ip pim sparse-mode full-duplex ! ! interface Serial1/0 ip address 131.1.123.3 255.255.255.0 ip pim sparse-mode encapsulation frame-relay ip ospf priority 0 serial restart-delay 0 no dce-terminal-timing-enable frame-relay map ip 131.1.123.1 302 frame-relay map ip 131.1.123.2 302 broadcast frame-relay map ip 131.1.123.3 302 no frame-relay inverse-arp ! ! router ospf 1 log-adjacency-changes network 3.3.3.3 0.0.0.0 area 3 network 131.1.123.3 0.0.0.0 area 0 network 131.3.3.3 0.0.0.0 area 3 Thanks for your help and support in advance Regards __________________ Amir Tahir -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Daniel Valle Sent: Sunday, March 30, 2008 4:52 AM To: groupstudy Subject: Multicast and NBMA again... I know this has been over and over... but there are always new guys around.... so here it is again... I need your expertise . I am labbing up a Hub and spoke scenario. R2 is the MA and is also the RP for the mcast groups R1 and R3 are Spokes R3 f0/0 is set to ip igmp join-group 224.3.3.3 I'm running ospf in all networks.... all is area 0 ( very simple!) this is the isse I'm facig. If I set the FR network as OSPF network point-to-multipoint the R1 ( spoke) pings 224.3.3.3 just fine, if I set the network to the default ( non broadcast), it does not work. In one network type, or in the other, all unicasts pings works fine... with few investigation I saw that when My topology is set to non-broadcast, the mcast group gets "P"runned with 3 packets or less.... If the network is set to P2M, the ping works fine, the network does not get prunned and the "T" flag is set. I know P2M modifies the nex-hop value of the routes, but I know know what else could that make in order to make my topology not to work., I really don't knwo how that come... the pings stops because the network get's all prunned... not because of RF failure...actually neigher scenarios I face RPF problems. Thank you !! Daniel. _______________________________________________________________________ Subscription information may be found at: http://www.groupstudy.com/list/CCIELab.html
