07-06-2023 04:01 PM
Hi,
I am configuring a DMVPN between cisco routers and looks everything is working fine I can see traffic is going from Spoke-1 to Spoke-2 but I am not able to see any routes with "H" which is NHRP when am doing "show ip route nhrp" in cisco router c-7200.
Can anyone guide me please where can be the problem?
Thank you in advance.
07-06-2023 04:19 PM
What is dmvpn phase ?
Can i see condig of hub and spoke ?
07-06-2023 04:24 PM
* It's Phase 3, sure here is the configuration.
HUB
interface Tunnel1
ip address 10.1.1.1 255.255.255.0
no ip redirects
no ip next-hop-self eigrp 1
no ip split-horizon eigrp 1
ip nhrp authentication DMVPN
ip nhrp map multicast dynamic
ip nhrp network-id 1234
ip nhrp redirect
ip summary-address eigrp 1 192.168.0.0 255.255.0.0
tunnel source FastEthernet0/0
tunnel mode gre multipoint
tunnel key 12345
tunnel protection ipsec profile PROF
end
Spoke-1
interface Tunnel1
ip address 10.1.1.2 255.255.255.0
no ip redirects
ip nhrp authentication DMVPN
ip nhrp map 10.1.1.1 1.1.1.1
ip nhrp map multicast 1.1.1.1
ip nhrp network-id 1234
ip nhrp nhs 10.1.1.1
ip nhrp shortcut
tunnel source FastEthernet0/0
tunnel mode gre multipoint
tunnel key 12345
tunnel protection ipsec profile PROF
end
Spoke-2
interface Tunnel1
ip address 10.1.1.3 255.255.255.0
no ip redirects
ip nhrp authentication DMVPN
ip nhrp map multicast 1.1.1.1
ip nhrp map 10.1.1.1 1.1.1.1
ip nhrp network-id 1234
ip nhrp nhs 10.1.1.1
ip nhrp shortcut
tunnel source FastEthernet0/0
tunnel mode gre multipoint
tunnel key 12345
tunnel protection ipsec profile PROF
end
07-06-2023 04:33 PM
ip summary-address eigrp 1 192.168.0.0 255.255.0.0
This summary to all prefix connect to Spoke?
07-06-2023 04:32 PM - edited 07-06-2023 04:36 PM
Here is the topology
07-06-2023 04:37 PM
Config is correct'
In Spoke
Ping 192.168.3.x source 192.168.2.x
Please select x according to LO IP you use in spokes
07-06-2023 04:39 PM
R2#ping 192.168.3.1 source 192.168.2.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.3.1, timeout is 2 seconds:
Packet sent with a source address of 192.168.2.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 92/184/464 ms
R2#traceroute 192.168.3.1 source 192.168.2.1
Type escape sequence to abort.
Tracing the route to 192.168.3.1
VRF info: (vrf in name/id, vrf out name/id)
1 10.1.1.3 68 msec 100 msec 112 msec
R2#
07-06-2023 04:43 PM
Traffic looks going from spoke-1 to spoke-2 but it's via NHRP which am not able to see the status in the routing table if there is any dynamic (direct spoke-to-spoke) tunnel.
R2#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
1.0.0.0/30 is subnetted, 1 subnets
B 1.1.1.0 [20/0] via 2.2.2.1, 00:31:21
2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 2.2.2.0/30 is directly connected, FastEthernet0/0
L 2.2.2.2/32 is directly connected, FastEthernet0/0
3.0.0.0/24 is subnetted, 1 subnets
B 3.3.3.0 [20/0] via 2.2.2.1, 00:31:21
8.0.0.0/32 is subnetted, 1 subnets
B 8.8.8.8 [20/0] via 2.2.2.1, 00:31:21
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.1.1.0/24 is directly connected, Tunnel1
L 10.1.1.2/32 is directly connected, Tunnel1
D 192.168.0.0/16 [90/27008000] via 10.1.1.1, 00:30:49, Tunnel1
192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.2.0/24 is directly connected, Loopback0
L 192.168.2.1/32 is directly connected, Loopback0
192.168.20.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.20.0/24 is directly connected, Loopback1
L 192.168.20.1/32 is directly connected, Loopback1
R2#
07-06-2023 05:03 PM
can I see
show run | sec router eigrp <<- in Hub and Spoke ?
07-06-2023 05:11 PM - edited 07-06-2023 05:12 PM
HUB#sho run | s router eigrp
router eigrp 1
network 10.1.1.0 0.0.0.255
network 192.168.1.0
network 192.168.10.0
Spoke-1#sho run | s router eigrp
router eigrp 1
network 10.1.1.0 0.0.0.255
network 192.168.2.0
network 192.168.20.0
Spoke-2#sho run | s router eigrp
router eigrp 1
network 10.1.1.0 0.0.0.255
network 192.168.3.0
network 192.168.30.0
07-06-2023 05:27 PM - edited 07-09-2023 03:37 AM
please see below post.
thanks
07-08-2023 12:47 PM
I had build the same LAB again it looks to me the problem with the image because it was running in virtual environment instead of physical devices so the IOS image was different on HUB and Spokes after using the same images as HUB was being used, problem solved and routes showed in the routing table.
Because could not see any configuration missing/wrong in above tunnel interface.
Sorry I do not know your name @MHM Cisco World but thank you brother.
07-08-2023 12:52 PM
thanks for update me,
so c-7200 image is issue in GNS3.
that new
glad issue solve
have a nice day
MHM
07-08-2023 12:59 PM
tonight I will run same lab I share before but this time with bgp as underlay protocol.
07-09-2023 03:37 AM
You are totally correct
run lab with BGP as underlaying and It work fine.
MHM
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