Hi experts,
I have a branch router (Cisco 1841) and it has a T1 link to my Core router 1 and it also has a VPN (DMVPN) link to Core router 2.
The tunnel is up and OSPF adjacencies are fully. I have also checked the cost on both interfaces and for both directions the VPN tunnel interfaces have much lower cost. All the links are in area 0. The followings are some "show" commands. What would cause this??
Thanks!
================================= Core 1 ====================================
Core1#sh run | be router ospf
router ospf 1
router-id 10.80.0.21
log-adjacency-changes
auto-cost reference-bandwidth 1000
area 0 authentication message-digest
area 0 range 10.26.0.0 255.255.0.0
...
network 10.26.222.0 0.0.0.255 area 0
network 10.80.0.21 0.0.0.0 area 0
Core1#sh run int s0/0/0
interface Serial0/0/0
bandwidth 1536
ip address 10.26.222.1 255.255.255.0
encapsulation ppp
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 7 xxx
ip ospf network point-to-point
ip ospf hello-interval 3
ip ospf dead-interval 15
end
Core1#sh ip ospf int s0/0/0
Serial0/0/0 is up, line protocol is up
Internet Address 10.26.222.1/24, Area 0
Process ID 1, Router ID 10.80.0.21, Network Type POINT_TO_POINT, Cost: 651
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 3, Dead 15, Wait 15, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:00
Supports Link-local Signaling (LLS)
Index 9/6, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 51
Last flood scan time is 0 msec, maximum is 4 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.80.0.72
Suppress hello for 0 neighbor(s)
Message digest authentication enabled
Youngest key id is 1
Core1#sh ip ospf neighbor 10.80.0.72
Neighbor 10.80.0.72, interface address 10.26.222.2
In the area 0 via interface Serial0/0/0
Neighbor priority is 0, State is FULL, 6 state changes
DR is 0.0.0.0 BDR is 0.0.0.0
Options is 0x52
LLS Options is 0x1 (LR)
Dead timer due in 00:00:14
Neighbor is up for 02:17:37
Index 10/8, retransmission queue length 0, number of retransmission 0
First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
Last retransmission scan length is 0, maximum is 0
Last retransmission scan time is 0 msec, maximum is 0 msec
================================= Core 2 ====================================
Core2#sh run | be router ospf
router ospf 1
router-id 10.80.0.22
log-adjacency-changes
auto-cost reference-bandwidth 1000
area 0 authentication message-digest
area 0 range 10.26.0.0 255.255.0.0
passive-interface GigabitEthernet0/0.130
passive-interface Serial0/1/0
network 10.26.130.0 0.0.0.255 area 0
network 10.26.160.0 0.0.0.255 area 0
network 10.26.180.0 0.0.0.7 area 0
network 10.26.180.8 0.0.0.3 area 0
network 10.26.221.0 0.0.0.255 area 0
network 10.27.0.0 0.0.0.255 area 0
network 10.80.0.22 0.0.0.0 area 0
network 10.255.255.0 0.0.0.255 area 0
Core2#sh run int t0
interface Tunnel0
description DMVPN HUB
bandwidth 3000
ip address 10.255.255.1 255.255.255.0
no ip redirects
ip mtu 1416
ip nhrp authentication xxx
ip nhrp map multicast dynamic
ip nhrp network-id 10
ip nhrp holdtime 3600
no ip route-cache cef
no ip route-cache
ip ospf message-digest-key 1 md5 xxx
ip ospf network broadcast
ip ospf priority 255
delay 1000
tunnel source GigabitEthernet0/1
tunnel mode gre multipoint
tunnel key 111
tunnel protection ipsec profile DMVPN_PROFILE
end
Core2#sh ip ospf neighbor 10.80.0.72
Neighbor 10.80.0.72, interface address 10.255.255.72
In the area 0 via interface Tunnel0
Neighbor priority is 1, State is FULL, 18 state changes
DR is 10.255.255.1 BDR is 10.255.255.1
Options is 0x52
LLS Options is 0x1 (LR)
Dead timer due in 00:00:35
Neighbor is up for 00:42:51
Index 8/8, retransmission queue length 0, number of retransmission 14
First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
Last retransmission scan length is 4, maximum is 4
Last retransmission scan time is 0 msec, maximum is 0 msec
Core2#sh ip ospf int t0
Tunnel0 is up, line protocol is up
Internet Address 10.255.255.1/24, Area 0
Process ID 1, Router ID 10.80.0.22, Network Type BROADCAST, Cost: 333
Transmit Delay is 1 sec, State BDR, Priority 255
Designated Router (ID) 10.80.0.73, Interface address 10.255.255.2
Backup Designated router (ID) 10.80.0.22, Interface address 10.255.255.1
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:02
Supports Link-local Signaling (LLS)
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 10, maximum is 24
Last flood scan time is 0 msec, maximum is 4 msec
Neighbor Count is 2, Adjacent neighbor count is 2
Adjacent with neighbor 10.80.0.72
Adjacent with neighbor 10.80.0.73 (Designated Router)
Suppress hello for 0 neighbor(s)
Message digest authentication enabled
Youngest key id is 1
================================= Branch ====================================
router ospf 1
router-id 10.80.0.72
log-adjacency-changes
auto-cost reference-bandwidth 1000
area 0 authentication message-digest
...
passive-interface default
no passive-interface Serial0/0/0
no passive-interface Loopback0
no passive-interface Tunnel2
network 10.26.222.0 0.0.0.255 area 0
...
network 10.255.255.0 0.0.0.255 area 0
interface Serial0/0/0
ip address 10.26.222.2 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip nbar protocol-discovery
encapsulation ppp
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 7 060E042A1F5B5E0A5D
ip ospf network point-to-point
ip ospf hello-interval 3
ip ospf dead-interval 15
service-module t1 timeslots 1-24
service-policy output PMAP_Voice
end
interface Tunnel2
bandwidth 3000
ip address 10.255.255.72 255.255.255.0
no ip redirects
ip mtu 1416
ip nhrp authentication xxx
ip nhrp map 10.255.255.1 69.46.103.133
ip nhrp network-id 10
ip nhrp holdtime 3600
ip nhrp nhs 10.255.255.1
no ip route-cache cef
no ip route-cache
ip tcp adjust-mss 1376
ip ospf message-digest-key 1 md5 7 xxx
ip ospf network broadcast
load-interval 30
delay 1000
qos pre-classify
tunnel source FastEthernet0/1
tunnel destination 69.46.103.133
tunnel key 111
tunnel protection ipsec profile DMVPN_PROFILE
end
Branch#sh ip ospf int t2
Tunnel2 is up, line protocol is up
Internet Address 10.255.255.72/24, Area 0
Process ID 1, Router ID 10.80.0.72, Network Type BROADCAST, Cost: 333
Transmit Delay is 1 sec, State DROTHER, Priority 1
Designated Router (ID) 10.80.0.22, Interface address 10.255.255.1
Backup Designated router (ID) 10.80.0.22, Interface address 10.255.255.1
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:07
Supports Link-local Signaling (LLS)
Index 2/8, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 3, maximum is 10
Last flood scan time is 0 msec, maximum is 4 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.80.0.22 (Designated Router)
Suppress hello for 0 neighbor(s)
Message digest authentication enabled
Youngest key id is 1
Branch#sh ip ospf nei 10.80.0.22
Neighbor 10.80.0.22, interface address 10.255.255.1
In the area 0 via interface Tunnel2
Neighbor priority is 255, State is FULL, 6 state changes
DR is 10.255.255.2 BDR is 10.255.255.1
Options is 0x12 in Hello (E-bit L-bit )
Options is 0x52 in DBD (E-bit L-bit O-bit)
LLS Options is 0x1 (LR)
Dead timer due in 00:00:36
Neighbor is up for 00:37:25
Index 2/2, retransmission queue length 0, number of retransmission 0
First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
Last retransmission scan length is 0, maximum is 0
Last retransmission scan time is 0 msec, maximum is 0 msec
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