According to the topology, R1 is hub while R2 & R3 are spokes. R4 is only used for underlay connectivity
R1 configuration:
interface Loopback0
ip address 172.16.1.1 255.255.255.0
interface Tunnel0
ip address 192.168.1.1 255.255.255.0
ip nhrp map multicast dynamic
ip nhrp network-id 100
ip nhrp redirect
tunnel source FastEthernet0/0
tunnel mode gre multipoint
router ospf 1
router-id 2.2.2.2
network 10.10.0.0 0.0.255.255 area 0
R2 configuration
interface Loopback0
ip address 172.16.2.1 255.255.255.0
interface Tunnel0
ip address 192.168.1.2 255.255.255.0
ip nhrp network-id 100
ip nhrp nhs 192.168.1.1 nbma 10.10.11.1 multicast
ip nhrp shortcut
tunnel source FastEthernet0/0
tunnel mode gre multipoint
router ospf 1
router-id 2.2.2.2
network 10.10.0.0 0.0.255.255 area 0
ip route 172.16.3.0 255.255.255.0 192.168.1.3
R3 Configuration
interface Loopback0
ip address 172.16.3.1 255.255.255.0
interface Tunnel0
ip address 192.168.1.3 255.255.255.0
ip nhrp network-id 100
ip nhrp nhs 192.168.1.1 nbma 10.10.11.1 multicast
ip nhrp shortcut
tunnel source FastEthernet0/0
tunnel mode gre multipoint
router ospf 1
router-id 3.3.3.3
network 10.10.0.0 0.0.255.255 area 0
ip route 172.16.2.0 255.255.255.0 192.168.1.2
the DMVPN works OK
Hub#sh dmvpn
# Ent Peer NBMA Addr Peer Tunnel Add State UpDn Tm Attrb
----- --------------- --------------- ----- -------- -----
1 10.10.12.2 192.168.1.2 UP 01:10:31 D
1 10.10.13.3 192.168.1.3 UP 01:09:56 D
R2#traceroute 172.16.3.1 source 172.16.2.1
Tracing the route to 172.16.3.1
VRF info: (vrf in name/id, vrf out name/id)
1 192.168.1.3 80 msec 60 msec 36 msec
however, when I want to enable EIGRP for R1/R2/R3
router eigrp 1
network 192.168.1.0 0.0.0.255
network 172.16.x.0 0.0.255.255
the EIGRP neighbor can no be established, on R2 & R3, it displays
%DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.1.1 (Tunnel0) is down: retry limit exceeded
%DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.1.1 (Tunnel0) is up: new adjacency
%DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.1.1 (Tunnel0) is down: retry limit exceeded
%DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.1.1 (Tunnel0) is up: new adjacency
%DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.1.1 (Tunnel0) is down: retry limit exceeded
and there is nothing in R1 for the
show ip eigrp neighbor
command
I wonder why it happened, and how to handle this problem?
