Hello everyone!
Have a typical DMVPN lab setup in GNS3 with 1 hub + 2 spokes, EIGRP configured including the tunnel interface and loopbacks, not the underlay IPs. The HUB and Spokes are pretty much connected in the same network. For some reason EIGRP continues to Flap constantly. I can see output on the spoke indicating the HUB to be its neighbor, but when issuing "sh ip eigrp neighbors" on the HUB there's no output. In the process of t-shooting I eliminated one of the SPOKEs, so at the moment I have 1 HUB and 1 SPOKE
Here's the configs and terminal outputs:
*****HUB config:
Building configuration...
Current configuration : 279 bytes
!
interface Tunnel0
ip address 192.168.0.1 255.255.255.0
no ip redirects
ip mtu 1400
no ip split-horizon eigrp 567
ip nhrp authentication cisco
ip nhrp network-id 1
ip tcp adjust-mss 1360
tunnel source GigabitEthernet0/0
tunnel mode gre multipoint
tunnel key 1234
end
Router(config-if)#do sh run | s r e
router eigrp 567
network 10.10.10.1 0.0.0.0
network 192.168.0.0
*******SPOKE config:
interface Tunnel0
ip address 192.168.0.2 255.255.255.0
no ip redirects
ip mtu 1400
ip nhrp authentication cisco
ip nhrp network-id 1
ip nhrp nhs 192.168.0.1 nbma 155.1.37.1
ip tcp adjust-mss 1360
tunnel source GigabitEthernet1
tunnel mode gre multipoint
tunnel key 1234
Router#sh run | s r e
router eigrp 567
network 10.10.10.2 0.0.0.0
network 192.168.0.0
**************Message in the terminal of the SPOKE, no messages on the HUB
May 10 02:25:30.748: %DUAL-5-NBRCHANGE: EIGRP-IPv4 567: Neighbor 192.168.0.1 (Tunnel0) is up: new adjacency
*May 10 02:26:50.262: %DUAL-5-NBRCHANGE: EIGRP-IPv4 567: Neighbor 192.168.0.1 (Tunnel0) is down: retry limit exceeded
*May 10 02:26:50.470: %DUAL-5-NBRCHANGE: EIGRP-IPv4 567: Neighbor 192.168.0.1 (Tunnel0) is up: new adjacency
*May 10 02:28:09.987: %DUAL-5-NBRCHANGE: EIGRP-IPv4 567: Neighbor 192.168.0.1 (Tunnel0) is down: retry limit exceeded
*May 10 02:28:14.518: %DUAL-5-NBRCHANGE: EIGRP-IPv4 567: Neighbor 192.168.0.1 (Tunnel0) is up: new adjacency
*********Debug eigrp packet both routers
*May 10 03:06:00.485: EIGRP: Received HELLO on Tu0 - paklen 20 nbr 192.168.0.1
*May 10 03:06:00.485: AS 567, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*May 10 03:06:00.527: EIGRP: Sending HELLO on Tu0 - paklen 20
*May 10 03:06:00.527: AS 567, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0
*May 10 03:06:03.299: EIGRP: Sending UPDATE on Tu0 - paklen 0 nbr 192.168.0.1, retry 10, RTO 5000 tid 0
*May 10 03:06:03.299: AS 567, Flags 0x1:(INIT), Seq 67/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*May 10 03:06:05.289: EIGRP: Received HELLO on Tu0 - paklen 20 nbr 192.168.0.1
*May 10 03:06:05.289: AS 567, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*May 10 03:06:05.447: EIGRP: Sending HELLO on Tu0 - paklen 20
