DMVPN and Multicast2 (Use NBMA Mode)
HQ:R1 RP
BRANCH-B:R33 Multicast Source BRANCH-A:R22 Multicast Receiver-A
R1
interface Tunnel0 ip address 10.0.0.1 255.255.255.0 ip nhrp map multicast dynamic ip nhrp network-id 123
ip nhrp redirect
ip ospf network point-to-multipoint
tunnel mode gre multipoint
tunnel source FastEthernet0/0
interface FastEthernet0/0 ip address 155.0.0.1 255.255.255.0
interface FastEthernet0/1 ip address 192.168.1.1 255.255.255.0
router ospf 123 router-id 1.1.1.1 network 10.0.0.1 0.0.0.0 area 0 network 192.168.1.1 0.0.0.0 area 0
R2
interface Tunnel0 ip address 10.0.0.2 255.255.255.0 no ip redirects ip nhrp map multicast 155.0.0.1 ip nhrp map 10.0.0.1 155.0.0.1 ip nhrp network-id 123 ip nhrp nhs 10.0.0.1
ip nhrp shortcut ip ospf network point-to-multipoint tunnel mode gre multipoint
tunnel source FastEthernet0/0
interface FastEthernet0/0 ip address 155.0.0.2 255.255.255.0
interface FastEthernet0/1 ip address 192.168.2.2 255.255.255.0
router ospf 123 router-id 2.2.2.2 network 10.0.0.2 0.0.0.0 area 0 network 192.168.2.2 0.0.0.0 area 0
R3 interface Tunnel0 ip address 10.0.0.3 255.255.255.0 no ip redirects ip nhrp map multicast 155.0.0.1 ip nhrp map 10.0.0.1 155.0.0.1 ip nhrp network-id 123 ip nhrp nhs 10.0.0.1
ip nhrp shortcut ip ospf network point-to-multipoint tunnel mode gre multipoint
tunnel source FastEthernet0/0
interface FastEthernet0/0 ip address 155.0.0.3 255.255.255.0
interface FastEthernet0/1 ip address 192.168.3.3 255.255.255.0
router ospf 123 router-id 3.3.3.3 network 10.0.0.3 0.0.0.0 area 0 network 192.168.3.3 0.0.0.0 area 0
R1/R2/R3
ip multicast-routing
crypto isakmp policy 123
encr 3des hash sha256 authentication pre-share group 2
crypto isakmp key CCIE address 0.0.0.0
crypto ipsec transform-set TRANS esp-3des esp-sha256-hmac mode transport
crypto ipsec profile PROFILE set transform-set TRANS
interface Tunnel0 tunnel protection ipsec profile PROFILE ip pim sparse-mode
interface FastEthernet0/1 ip pim sparse-mode
ip pim rp-address 10.0.0.1
R11 interface FastEthernet0/0 ip address 192.168.1.11 255.255.255.0
ip route 0.0.0.0 0.0.0.0 192.168.1.1
R22 interface FastEthernet0/0 ip address 192.168.2.22 255.255.255.0
ip route 0.0.0.0 0.0.0.0 192.168.2.2
R33 interface FastEthernet0/0 ip address 192.168.3.33 255.255.255.0
ip route 0.0.0.0 0.0.0.0 192.168.3.3
R1#show dmvpn
Interface: Tunnel0, IPv4 NHRP Details Type:Hub, NHRP Peers:2,
# Ent Peer NBMA Addr Peer Tunnel Add State UpDn Tm Attrb ----- --------------- --------------- ----- -------- ----- 1 155.0.0.2 10.0.0.2 UP 00:00:29 D 1 155.0.0.3 10.0.0.3 UP 00:00:34 D
Configure ip igmp join-group command on R22.
R22 interface FastEthernet0/0 ip igmp join-group 239.255.1.1
show ip mroute
R2#sh ip mroute
(*, 239.255.1.1), 00:29:33/00:02:27, RP 10.0.0.1, flags: SJC Incoming interface: Tunnel0, RPF nbr 10.0.0.1 Outgoing interface list: FastEthernet0/1, Forward/Sparse, 00:29:33/00:02:27
(*, 224.0.1.40), 00:29:35/00:02:26, RP 10.0.0.1, flags: SJCL Incoming interface: Tunnel0, RPF nbr 10.0.0.1 Outgoing interface list: FastEthernet0/1, Forward/Sparse, 00:29:34/00:02:26
R3#sh ip mroute
(*, 224.0.1.40), 00:30:38/00:02:30, RP 10.0.0.1, flags: SJCL Incoming interface: Tunnel0, RPF nbr 10.0.0.1 Outgoing interface list: FastEthernet0/1, Forward/Sparse, 00:30:37/00:02:30
R1#sh ip mroute
(*, 239.255.1.1), 00:29:37/00:03:20, RP 10.0.0.1, flags: S Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Tunnel0, Forward/Sparse, 00:01:08/00:03:20
(*, 224.0.1.40), 00:30:54/00:03:20, RP 10.0.0.1, flags: SJCL Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Tunnel0, Forward/Sparse, 00:01:14/00:03:20 FastEthernet0/1, Forward/Sparse, 00:30:53/00:02:13
R1 receive a PIM (*,G) join message from R2,
and include Tunnel 0 interface to OIL.
Send multicast packets
R33#ping 239.255.1.1 Type escape sequence to abort. Sending 1, 100-byte ICMP Echos to 239.255.1.1, timeout is 2 seconds:
.
show ip mroute
R3#sh ip mroute
(*, 239.255.1.1), 00:00:34/stopped, RP 10.0.0.1, flags: SPF Incoming interface: Tunnel0, RPF nbr 10.0.0.1 Outgoing interface list: Null
(192.168.3.33, 239.255.1.1), 00:00:34/00:02:26, flags: FT Incoming interface: FastEthernet0/1, RPF nbr 0.0.0.0 Outgoing interface list: Tunnel0, Forward/Sparse, 00:00:22/00:03:07
(*, 224.0.1.40), 00:00:57/00:02:28, RP 10.0.0.1, flags: SJCL Incoming interface: Tunnel0, RPF nbr 10.0.0.1 Outgoing interface list: FastEthernet0/1, Forward/Sparse, 00:00:57/00:02:28
R2#sh ip mroute
(*, 239.255.1.1), 00:01:18/00:02:36, RP 10.0.0.1, flags: SJC Incoming interface: Tunnel0, RPF nbr 10.0.0.1 Outgoing interface list: FastEthernet0/1, Forward/Sparse, 00:01:18/00:02:36
(*, 224.0.1.40), 00:01:47/00:02:36, RP 10.0.0.1, flags: SJCL Incoming interface: Tunnel0, RPF nbr 10.0.0.1 Outgoing interface list: FastEthernet0/1, Forward/Sparse, 00:01:47/00:02:36
R1#sh ip mroute
(*, 239.255.1.1), 00:01:02/00:02:38, RP 10.0.0.1, flags: S Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Tunnel0, Forward/Sparse, 00:00:51/00:02:38
(192.168.3.33, 239.255.1.1), 00:01:02/00:01:57, flags: PX Incoming interface: Tunnel0, RPF nbr 10.0.0.3 Outgoing interface list: Null
(*, 224.0.1.40), 00:01:17/00:03:08, RP 10.0.0.1, flags: SJCL Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Tunnel0, Forward/Sparse, 00:00:27/00:03:08 FastEthernet0/1, Forward/Sparse, 00:01:17/00:02:01
R3 send multicast packets capsuled as a register message to RP because it is First Hop Router .
R1 receive a register message,
and include Tunnel 0 interface to incoming interface.
The OIL on R1 become Null
because R1 can NOT include same interface for incoming interface and OIL.
Configure ip pim nbma-mode command for tunnel 0 interface on R1
R1
interface Tunnel0 ip pim nbma-mode
Send multicast packets
R33#ping 239.255.1.1 Type escape sequence to abort. Sending 1, 100-byte ICMP Echos to 239.255.1.1, timeout is 2 seconds:
Reply to request 0 from 192.168.2.22, 1076 ms
R1#sh ip mroute
(*, 239.255.1.1), 00:01:00/stopped, RP 10.0.0.1, flags: S Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Tunnel0, 10.0.0.2, Forward/Sparse, 00:01:00/00:02:44
(192.168.3.33, 239.255.1.1), 00:00:30/00:02:29, flags: Incoming interface: Tunnel0, RPF nbr 10.0.0.3 Outgoing interface list: Tunnel0, 10.0.0.2, Forward/Sparse, 00:00:30/00:02:59
(*, 224.0.1.40), 00:01:04/00:02:43, RP 10.0.0.1, flags: SJCL Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Tunnel0, 10.0.0.3, Forward/Sparse, 00:00:46/00:02:43 Tunnel0, 10.0.0.2, Forward/Sparse, 00:00:49/00:02:40 FastEthernet0/1, Forward/Sparse, 00:01:04/00:02:08
R1 can identify IP address that sent each message, even if it receives PIM Join and a register message via same interface.
Therefore R1 can receicve and send multicast pakets via an interface, tunnel 0.
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