12-05-2018 02:06 PM
Hi guys Im having an issue whereby my DMVPN has peered with my spokes and OSPF neighbors have formed adjacency but for some reason the routes are not showing on either end. When I look at the database I can see them but not in the respective routing tables. Below is my config.
Hub interface Tunnel0 ip vrf forwarding MPLS ip address 10.10.10.10 255.255.255.0 no ip redirects ip mtu 1440 ip nhrp authentication cisco123 ip nhrp map multicast dynamic ip nhrp network-id 1 ip nhrp holdtime 600 ip nhrp server-only no ip mfib cef input no ip mfib cef output ip ospf network broadcast tunnel source GigabitEthernet0/3 tunnel mode gre multipoint tunnel vrf MPLS ! router ospf 1 vrf MPLS router-id 192.168.99.3 priority 2 redistribute static subnets network 10.4.21.156 0.0.0.3 area 1.1.1.1 network 10.10.10.0 0.0.0.255 area 2 network 192.168.99.0 0.0.0.15 area 0 neighbor 10.4.21.157 default-information originate
Spoke interface Tunnel0 ip address 10.10.10.20 255.255.255.0 no ip redirects ip mtu 1440 ip nhrp authentication cisco123 ip nhrp map multicast dynamic ip nhrp map multicast 172.16.1.1 ip nhrp map 10.10.10.10 172.16.1.1 ip nhrp network-id 1 ip nhrp holdtime 300 ip nhrp nhs 10.10.10.10 ip nhrp shortcut ip nhrp redirect no ip mfib cef input no ip mfib cef output delay 1000 tunnel source GigabitEthernet0/1 tunnel mode gre multipoint ! router ospf 1 priority 0 network 10.10.10.0 0.0.0.255 area 2 network 192.168.15.0 0.0.0.255 area 2
Solved! Go to Solution.
12-06-2018 06:49 AM
Hi,
The issue is looking as network type at both ends.
Regards,
Deepak Kumar
12-06-2018 02:13 AM
Hi,
could you post the output of "show ip ospf interface Tunnel0" from both routers?
(I'm particulary interested in the OSPF network types.)
Regards,
Rolf
12-06-2018 05:37 AM
Hub Tunnel0 is up, line protocol is up Internet Address 10.10.10.10/24, Area 2, Attached via Network Statement Process ID 1, Router ID 192.168.99.3, Network Type BROADCAST, Cost: 1000 Topology-MTID Cost Disabled Shutdown Topology Name 0 1000 no no Base Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 192.168.99.3, Interface address 10.10.10.10 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 oob-resync timeout 40 Hello due in 00:00:05 Supports Link-local Signaling (LLS) Cisco NSF helper support enabled IETF NSF helper support enabled Index 1/1/3, flood queue length 0 Next 0x0(0)/0x0(0)/0x0(0) Last flood scan length is 8, maximum is 8 Last flood scan time is 0 msec, maximum is 1 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 192.168.15.1 Suppress hello for 0 neighbor(s)
Spoke Tunnel0 is up, line protocol is up Internet Address 10.10.10.20/24, Area 2, Attached via Network Statement Process ID 1, Router ID 192.168.15.1, Network Type POINT_TO_POINT, Cost: 1000 Topology-MTID Cost Disabled Shutdown Topology Name 0 1000 no no Base Transmit Delay is 1 sec, State POINT_TO_POINT Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 oob-resync timeout 40 Hello due in 00:00:01 Supports Link-local Signaling (LLS) Cisco NSF helper support enabled IETF NSF helper support enabled Index 1/2/2, flood queue length 0 Next 0x0(0)/0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 192.168.99.3 Suppress hello for 0 neighbor(s)
12-06-2018 05:51 AM
The network types point-to-point and broadcast are not compatible.
Unfortunately I'm not up-to-date about the current recommendations for OSPF network types in DMVPNs.
When you don't want to change the network type on the hub, you'll need to change it on the spoke to broadcast or NBMA (with timer adjustment and neighbor statement in this case).
12-06-2018 03:27 AM
Hello
I agree with rolf,
Hub tunnel - BROADCAST
spoke tunnel -POINT_TO_POINT,
12-06-2018 06:49 AM
Hi,
The issue is looking as network type at both ends.
Regards,
Deepak Kumar
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