Hi i have two routers connected to the same switch( layer2 or layer3) and i have run on both routers ospf protocols, but both the routers are unable to form adjacencies.
here are my configuration
Router 1
hostname Router1
ip dhcp excluded-address 88.240.12.89
!
ip dhcp pool acp1
network 88.240.12.88 255.255.255.248
default-router 88.240.12.89
interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.10
encapsulation dot1Q 10
ip address 88.240.12.89 255.255.255.248
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Vlan1
no ip address
shutdown
!
router ospf 1
log-adjacency-changes
network 0.0.0.0 0.0.0.0 area 0
Router 2
hostname Router2
ip dhcp excluded-address 88.240.12.97
!
ip dhcp pool AP2
network 88.240.12.96 255.255.255.248
default-router 88.240.12.97
interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.20
encapsulation dot1Q 20
ip address 88.240.12.97 255.255.255.248
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Vlan1
no ip address
shutdown
!
router ospf 1
log-adjacency-changes
network 0.0.0.0 0.0.0.0 area 0
Switch
hostname Switch
ip routing
interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/12
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
