Help with OSPF configuration (Multi-layer switch)

[haydenirvin]

 

I seem to be configuring OSPF wrong. Need some help. Can one of you assist me?

Here are my configs 

Router 1 Config

en
config t

int g0/0
ip add 192.168.0.254 255.255.255.0
no shut

int g0/1
ip add 172.16.0.2 255.255.255.252
no shut

int g0/2
ip add 172.16.0.6 255.255.255.252
no shut

router ospf 1
network 192.168.0.0 0.0.0.255 area 0
network 172.16.0.0 0.0.0.3 area 0
network 172.16.0.4 0.0.0.3 area 0

 

Multilayer switch 1 (Left side)

en
config t

vlan 5

vlan 10

vlan 15

int vlan 5
ip add 10.0.0.126 255.255.255.128
no shut
ip helper-address 192.168.0.1

int vlan 10
ip add 10.0.0.190 255.255.255.192
no shut
ip helper-address 192.168.0.1

int vlan 15
ip add 10.0.0.254 255.255.255.192
no shut
ip helper-address 192.168.0.1

int g1/0/24
switchport mode acc
switchport mode trunk
no shut

exit
ip routing

router ospf 1
network 10.0.0.0 0.0.0.127 area 0
network 10.0.0.128 0.0.0.63 area 0
network 10.0.0.192 0.0.0.63 area 0
network 172.16.0.0 0.0.0.3 area 0

Multilayer switch 2 (right side)

en
config t

vlan 5

vlan 10

vlan 15

int vlan 5
ip add 10.0.1.126 255.255.255.128
no shut
ip helper-address 192.168.0.1

int vlan 10
ip add 10.0.1.190 255.255.255.192
no shut
ip helper-address 192.168.0.1

int vlan 15
ip add 10.0.1.254 255.255.255.192
no shut
ip helper-address 192.168.0.1

int g1/0/24
switchport mode acc
switchport mode trunk

exit
ip routing

router ospf 1

network 10.0.1.0 0.0.0.127 area 0
network 10.0.1.128 0.0.0.63 area 0
network 10.0.1.192 0.0.0.63 area 0
network 172.16.0.4 0.0.0.3 area 0

[kapilsoni21 · Accepted solution]

Remove interface configuration of port gi1/0/24 from both the multilayer switch, and configure the IP addresses from the same subnet which is used by you to connect to router 1, Hope below-mentioned configuration will help you On right side Multilayer switch conf t int g1/0/24 ip add 172.16.0.1 255.255.255.252 no sh exit On Left side Multilayer switch conf t int g1/0/24 ip add 172.16.0.5 255.255.255.252 no sh exit

[haydenirvin]

Thank you

[Jaderson Pessoa · Accepted solution]

@haydenirvin Hello,

Do below changes

Router 1 Config

en
config t

int g0/0
ip add 192.168.0.254 255.255.255.0
no shut

int g0/1
ip add 172.16.0.2 255.255.255.252
no shut

int g0/2
ip add 172.16.0.6 255.255.255.252
no shut

router ospf 1
network 192.168.0.0 0.0.0.255 area 0
network 172.16.0.0 0.0.0.3 area 0
network 172.16.0.4 0.0.0.3 area 0

 

Multilayer switch 1 (Left side)

en
config t

vlan 5

vlan 10

vlan 15

int vlan 5
ip add 10.0.0.126 255.255.255.128
no shut
ip helper-address 192.168.0.1

int vlan 10
ip add 10.0.0.190 255.255.255.192
no shut
ip helper-address 192.168.0.1

int vlan 15
ip add 10.0.0.254 255.255.255.192
no shut
ip helper-address 192.168.0.1

int g1/0/24
no switchport mode acc
no switchport mode trunk

ip address 192.168.0.253 255.255.255.0

ip ospf 1 area 0

exit
ip routing

router ospf 1
network 10.0.0.0 0.0.0.127 area 0
network 10.0.0.128 0.0.0.63 area 0
network 10.0.0.192 0.0.0.63 area 0
network 172.16.0.0 0.0.0.3 area 0

Multilayer switch 2 (right side)

en
config t

vlan 5

vlan 10

vlan 15

int vlan 5
ip add 10.0.1.126 255.255.255.128
no shut
ip helper-address 192.168.0.1

int vlan 10
ip add 10.0.1.190 255.255.255.192
no shut
ip helper-address 192.168.0.1

int vlan 15
ip add 10.0.1.254 255.255.255.192
no shut
ip helper-address 192.168.0.1

int g1/0/24
no switchport mode acc
no switchport mode trunk

ip address 172.16.0.5 255.255.255.252

ip ospf 1 area 0

exit
ip routing

router ospf 1

network 10.0.1.0 0.0.0.127 area 0
network 10.0.1.128 0.0.0.63 area 0
network 10.0.1.192 0.0.0.63 area 0
network 172.16.0.4 0.0.0.3 area 0

• Other Switching

[Jaderson Pessoa · Accepted solution]

Router 1 Config

en
config t

int g0/0
ip add 192.168.0.254 255.255.255.0
no shut

int g0/1
ip add 172.16.0.2 255.255.255.252
no shut

int g0/2
ip add 172.16.0.6 255.255.255.252
no shut

router ospf 1
network 192.168.0.0 0.0.0.255 area 0
network 172.16.0.0 0.0.0.3 area 0
network 172.16.0.4 0.0.0.3 area 0

 

Multilayer switch 1 (Left side)

en
config t

vlan 5

vlan 10

vlan 15

int vlan 5
ip add 10.0.0.126 255.255.255.128
no shut
ip helper-address 192.168.0.1

int vlan 10
ip add 10.0.0.190 255.255.255.192
no shut
ip helper-address 192.168.0.1

int vlan 15
ip add 10.0.0.254 255.255.255.192
no shut
ip helper-address 192.168.0.1

int g1/0/24
no switchport mode acc
no switchport mode trunk

ip address 192.168.0.253 255.255.255.0

ip ospf 1 area 0

exit
ip routing

router ospf 1
network 10.0.0.0 0.0.0.127 area 0
network 10.0.0.128 0.0.0.63 area 0
network 10.0.0.192 0.0.0.63 area 0
network 172.16.0.0 0.0.0.3 area 0

Multilayer switch 2 (right side)

en
config t

vlan 5

vlan 10

vlan 15

int vlan 5
ip add 10.0.1.126 255.255.255.128
no shut
ip helper-address 192.168.0.1

int vlan 10
ip add 10.0.1.190 255.255.255.192
no shut
ip helper-address 192.168.0.1

int vlan 15
ip add 10.0.1.254 255.255.255.192
no shut
ip helper-address 192.168.0.1

int g1/0/24
no switchport mode acc
no switchport mode trunk

ip address 172.16.0.5 255.255.255.252

ip ospf 1 area 0

exit
ip routing

router ospf 1

network 10.0.1.0 0.0.0.127 area 0
network 10.0.1.128 0.0.0.63 area 0
network 10.0.1.192 0.0.0.63 area 0
network 172.16.0.4 0.0.0.3 area 0

[haydenirvin]

I needed to do the no switchport command. Thank you

[Jaderson Pessoa]

glad to help :)