ospf problem path selection

[Hossein Forghani]

in above scenario ospf , when the connection between two switches was downed.(in any reason )router R4 can not ping 192.168.13.1 ( R1 interface 0/1) . in this situation we want ping this ip with path up ( R2--R1) . how can handle this problem ??
thanks...

[mohamad ebrahimi · Accepted solution]

Hofo

Your problem has already been my problem.in this situation, you should use tunnel with static route for solve problem.

R1#

interface Loopback1
 ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
 ip address 192.168.12.1 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 192.168.13.1 255.255.255.0
 duplex auto
 speed auto
!
interface tunnel 10
ip address 192.168.113.1 255.255.255.0
tunnel source 1.1.1.1
tunnel destination 3.3.3.3

router ospf 1
 network 192.168.12.0 0.0.0.255 area 0
 network 192.168.13.0 0.0.0.255 area 0

 network 1.1.1.1 0.0.0.0 area 0
!
ip route 192.168.13.3 255.255.255.255 192.168.113.3


R3#

interface Loopback1
 ip address 3.3.3.3 255.255.255.255
!
interface FastEthernet0/0
 ip address 192.168.34.3 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 192.168.13.3 255.255.255.0
 duplex auto
 speed auto
!
interface tunnel 10
ip address 192.168.113.3 255.255.255.0
tunnel source 3.3.3.3
tunnel destination 1.1.1.1

router ospf 1
 network 192.168.34.0 0.0.0.255 area 0
 network 192.168.13.0 0.0.0.255 area 0
 network 3.3.3.3 0.0.0.0 area 0
!
ip route 192.168.13.1 255.255.255.255 192.168.113.1


i use tunnel gre because when static route want to get 192.168.13.0 in any two router R1 can not reach R3.with this channel you can solve your problem.

HTH

[Hossein Forghani]

thanks  mohamad ebrahimi

your solution solve my problem.this solution in my network very suitable.

HOFO