10-20-2017 03:29 AM - edited 03-05-2019 09:20 AM
Hello,
I configured the VPN S2S on ASA 5508X (9.6) and IOS Cisco 881. The VPN is working. Between devices is internet connection. Now i try configure the OSPF between the devices, and every time i can not set the OSPF neighbors. Can you help me? Please :)
On IOS:
interface FastEthernet4 ip address 195.150.XX.XX 255.255.255.248 description Access to OUTSIDE no ip redirects no ip proxy-arp ip nat outside ip virtual-reassembly in ip ospf network point-to-point duplex auto speed auto no cdp enable crypto map outside_map ! router ospf 100 router-id 12.12.12.12 network 10.1.20.10 0.0.0.0 area 0 network 10.10.98.0 0.0.0.255 area 0 network 195.150.XX.XX 0.0.0.7 area 0 neighbor 213.216.XXX.XXX
Result:
sh ip ospf interface Loopback10 is up, line protocol is up Internet Address 10.1.20.10/32, Area 0, Attached via Network Statement Process ID 100, Router ID 12.12.12.12, Network Type LOOPBACK, Cost: 1 Topology-MTID Cost Disabled Shutdown Topology Name 0 1 no no Base Loopback interface is treated as a stub Host FastEthernet4 is up, line protocol is up Internet Address 195.150.XX.XX/29, Area 0, Attached via Network Statement Process ID 100, Router ID 12.12.12.12, Network Type POINT_TO_POINT, Cost: 1 Topology-MTID Cost Disabled Shutdown Topology Name 0 1 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 00:00:00 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 0, maximum is 0 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s)
On ASA
interface GigabitEthernet1/1 duplex full nameif outside security-level 0 ip address 213.216.XXX.XXX 255.255.255.248 ospf network point-to-point non-broadcast ! route outside 0.0.0.0 0.0.0.0 213.216.XXX.XXX 1 router ospf 100 router-id 9.9.9.9 network 10.226.156.0 255.255.255.0 area 0 network 213.216.XXX.XXX 255.255.255.248 area 0 neighbor 195.150.XX.XX interface outside log-adj-changes ! sh ospf interface outside is up, line protocol is up Internet Address 213.216.XXX.XXX mask 255.255.255.248, Area 0 Process ID 100, Router ID 9.9.9.9, Network Type POINT_TO_POINT, Cost: 10 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 0:00:04 Supports Link-local Signaling (LLS) Cisco NSF helper support enabled IETF NSF helper support enabled Index 2/2, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 0, maximum is 0 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s) sh ospf neighbor Neighbor ID Pri State Dead Time Address Interface N/A 0 DOWN/ - - 195.150.XX.XX outside
10-20-2017 03:41 PM
Hello @ukaszquz
You should use point-to-point non-broadcast and same-security-traffic permit intra-interface commands.
But probably your bigger problem is NAT. Try to create a NET exempt for OSPF traffic and interfaces.
-If I helped you somehow, please, rate it as useful.-
10-22-2017 05:52 AM
Hello,
it used to be (and I am not sure if that has changed in the meantime) that multicast traffic (which OSPF uses) cannot be sent with IPSec unless you use a GRE tunnel, or a VTI (which eliminates the need for crypto maps)...
Can you try and configure a VTI and check if that works with OSPF ?
11-03-2017 02:31 AM
I checked the configuration on ASA and on ASA i have hello massage to neighbor:
OSPF: Send hello to 185.75.3.XXX area 10 on outside from 213.216.110.XXX OSPF: Send hello to 185.75.3.XXX area 10 on outside from 213.216.110.XXX
On IOS router C881 every time i have hello to multicast:
Nov 3 09:10:20.111: OSPF-20 HELLO NV0: Send hello to 224.0.0.5 area 10 from 0.0.0.0 Nov 3 09:10:29.403: OSPF-20 HELLO NV0: Send hello to 224.0.0.5 area 10 from 0.0.0.0 Nov 3 09:10:38.471: OSPF-20 HELLO NV0: Send hello to 224.0.0.5 area 10 from 0.0.0.0 Nov 3 09:10:47.951: OSPF-20 HELLO NV0: Send hello to 224.0.0.5 area 10 from 0.0.0.0
On IOS my configuration is:
inf fe4
ip address 185.75.3.XXX 255.255.255.192 ip nat outside ip virtual-reassembly in ip ospf network point-to-multipoint non-broadcast ip ospf dead-interval 40 ip ospf hello-interval 10 duplex auto speed auto no cdp enable crypto map outside_map
router ospf 20
router-id 12.12.12.12
network 185.75.3.XXX 0.0.0.0 area 10
neighbor 213.216.110.XXX
How can i change the send hello by unicast from router to the neighbor?
Thank you :)
11-03-2017 03:14 AM
Hello
You ospf network types need to be non-broadcast as they dont support multicast and then you'll need to specify the unicast peer in the ospf process
inx/x
ip ospf network non-broadcast
router ospf 1
neigbour x.x.x.x
res
Paul
11-03-2017 04:34 AM
Hi,
I changed the int to ip ospf network non-broadcast
and the same:
Nov 3 11:16:50.270: OSPF-20 HELLO NV0: Send hello to 224.0.0.5 area 10 from 0.0.0.0 Nov 3 11:16:59.530: OSPF-20 HELLO NV0: Send hello to 224.0.0.5 area 10 from 0.0.0.0
11-03-2017 04:49 AM
Hello
Did you doe this on both sides of the peering and did you specify neigbour x.x.x. in the OPSF process?
res
Paul
11-03-2017 05:20 AM
Hi,
Yes, i did set it on both sites: ASA and router:
ASA:
interface GigabitEthernet1/1 duplex full nameif outside security-level 0 ip address 213.216.110.XXX 255.255.255.248 ospf network point-to-point non-broadcast
router ospf 20
router-id 11.11.11.11
network 213.216.110.XXX 255.255.255.255 area 10
neighbor 185.75.3.XXX interface outside
log-adj-changes
Router:
interface FastEthernet4 ip address 185.75.3.XXX 255.255.255.192 ip nat outside ip virtual-reassembly in ip ospf network non-broadcast ip ospf dead-interval 40 ip ospf hello-interval 10 duplex auto speed auto no cdp enable crypto map outside_map router ospf 20 router-id 12.12.12.12 network 185.75.3.XXX 0.0.0.0 area 10 neighbor 213.216.110.XXX
11-03-2017 11:31 AM - edited 11-03-2017 10:44 PM
You are trying to do the impossible. You can only have OSPF neighbourships when the endpoints are in the same network and have the same mask. (Although I did read an article about some PPP and unumbered IP that worked but even the author was doing this for research and testing)
you need to set up a GRE tunnel, add those tunnel interfaces to OSPF and create the neighbourship. But your current set up will not work. You cannot have an OSPF Neibhouship over a routed network as you trying to.. use tunnels [Edited]
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: