11-05-2014 08:56 AM - edited 03-05-2019 12:06 AM
Hello i have some problems with the default route distribution in ospf.
i can see that the default route is learned trough ospf, but i cant ping the gateway, or anything beyond the router connected to ISP.
here is my configuration:
R1 to ISP this router have full network access
!
interface FastEthernet0/0
ip address 192.168.5.5 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.1.1 255.255.255.0
ip ospf 1 area 0
duplex auto
speed auto
!
router ospf 1
router-id 5.5.5.5
network 192.168.1.0 0.0.0.255 area 0
default-information originate always
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip route 0.0.0.0 0.0.0.0 192.168.5.1
!
control-plane
!
line con 0
line aux 0
line vty 0 4
login
transport input all
!
scheduler allocate 20000 1000
end
---------------------------------------------------------------------------
R2: this router does not have access to 192.168.5.1.
interface FastEthernet0/0
ip address 192.168.1.5 255.255.255.0
ip ospf priority 0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.2.1 255.255.255.0
ip ospf 1 area 1
duplex auto
speed auto
!
router ospf 1
router-id 2.2.2.2
network 192.168.1.0 0.0.0.255 area 0
network 192.168.2.0 0.0.0.255 area 0
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
line con 0
line aux 0
line vty 0 4
login
transport input all
!
----------------------------------------------------------------
R2 sh ip route:
Router#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 192.168.1.1 to network 0.0.0.0
O*E2 0.0.0.0/0 [110/1] via 192.168.1.1, 00:13:57, FastEthernet0/0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.0/24 is directly connected, FastEthernet0/0
L 192.168.1.5/32 is directly connected, FastEthernet0/0
----------------------------------------------------------------------------------------------
Router#ping 192.168.5.5
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.5.5, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Router#
----------------------------------------------------------------------------------------------
Router#ping 192.168.5.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.5.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Router#
----------------------------------------------------------------------------------------------
Router#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
5.5.5.5 1 FULL/DR 00:00:35 192.168.1.1 FastEthernet0/0
Router#
--------------------------------------------------------------------------------------------------
Router#sh ip ospf database
OSPF Router with ID (2.2.2.2) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
2.2.2.2 2.2.2.2 952 0x80000002 0x0072D4 1
5.5.5.5 5.5.5.5 953 0x80000003 0x0059D6 1
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
192.168.1.1 5.5.5.5 953 0x80000001 0x00514D
Router Link States (Area 1)
Link ID ADV Router Age Seq# Checksum Link count
2.2.2.2 2.2.2.2 977 0x80000006 0x00FA33 0
5.5.5.5 5.5.5.5 2010 0x80000004 0x0057D7 1
Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
192.168.1.1 5.5.5.5 2015 0x80000001 0x00514D
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
0.0.0.0 5.5.5.5 301 0x80000002 0x00A2FA 1
---------------------------------------------------------------------------------------------------
what is wrong with my configuration?
Solved! Go to Solution.
11-05-2014 09:06 AM
I don't think there's anything wrong outside of possibly needing to configure NAT on the router that connects to the ISP. The problem I believe is that the ISP device doesn't know anything about the 192.168.1.x subnet. If you configure NAT on R1, you should see the return traffic. Try this:
interface FastEthernet0/0
ip nat outside
!
interface FastEthernet0/1
ip nat inside
access-list 100 permit ip 192.168.1.0 0.0.0.255 any
access-list 100 permit ip 192.168.2.0 0.0.0.255 any
ip nat inside source list 100 interfac f0/0 overload
I'm assuming that the interface 192.168.5.5 is directly connected to the ISP's equipment? If that's the case try the above and see if it works.
HTH,
John
11-05-2014 09:06 AM
I don't think there's anything wrong outside of possibly needing to configure NAT on the router that connects to the ISP. The problem I believe is that the ISP device doesn't know anything about the 192.168.1.x subnet. If you configure NAT on R1, you should see the return traffic. Try this:
interface FastEthernet0/0
ip nat outside
!
interface FastEthernet0/1
ip nat inside
access-list 100 permit ip 192.168.1.0 0.0.0.255 any
access-list 100 permit ip 192.168.2.0 0.0.0.255 any
ip nat inside source list 100 interfac f0/0 overload
I'm assuming that the interface 192.168.5.5 is directly connected to the ISP's equipment? If that's the case try the above and see if it works.
HTH,
John
11-05-2014 09:13 AM
sorry missed that one, working now:)
11-05-2014 09:17 AM
Awesome :) Thanks for letting me know!
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