Friday, March 6, 2020

OSPF Routing and ROAS Cisco Config Issue

Hi everyone, I am having a bit of trouble trying to get full network connectivity on a 3 router OSPF, ROAS lab where I do not have access to a Layer 3 Switch.

It seems like there is an issue with the Sub Interface and the OSPF BDR's R01 and R03.

Can anyone point me in the right direction, advise correct config or notice any issues with what I have produced,

Any thoughts are appreciated!

Network Topology: https://imgur.com/a/tNH0poF

Scenario/Current status:

  • I can ping the sub-interface IP addresses (g0/1.10 and g0/3.10) on R01 and R03 from all routers.
  • I can ping SW01 SVI interface IP from R01 only.
  • I can ping SW02 SVI interface IP from R03 only.
  • I cannot ping the SVI interface on either switches from R02.
  • I cannot ping interface G0/1 on R03 from SW02
  • I cannot ping interface G0/1 on R01 from SW01

Device Config Snippets:

R01: interface GigabitEthernet0/0 ip address 10.0.0.1 255.255.255.252 duplex auto speed auto media-type rj45 ! interface GigabitEthernet0/1 no ip address duplex auto speed auto media-type rj45 ! interface GigabitEthernet0/1.10 encapsulation dot1Q 10 ip address 192.168.11.254 255.255.255.0 ! router ospf 10 router-id 1.1.1.1 network 10.0.0.0 0.0.0.3 area 0 network 192.168.11.0 0.0.0.255 area 0 default-information originate --- Gateway of last resort is not set 10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks C 10.0.0.0/30 is directly connected, GigabitEthernet0/0 L 10.0.0.1/32 is directly connected, GigabitEthernet0/0 O 10.0.0.4/30 [110/2] via 10.0.0.2, 00:29:53, GigabitEthernet0/0 192.168.11.0/24 is variably subnetted, 2 subnets, 2 masks C 192.168.11.0/24 is directly connected, GigabitEthernet0/1.10 L 192.168.11.254/32 is directly connected, GigabitEthernet0/1.10 O 192.168.22.0/24 [110/3] via 10.0.0.2, 00:29:53, GigabitEthernet0/0 

R02: interface GigabitEthernet0/0 ip address 10.0.0.5 255.255.255.252 duplex auto speed auto media-type rj45 ! interface GigabitEthernet0/1 ip address 10.0.0.2 255.255.255.252 duplex auto speed auto media-type rj45 ! router ospf 10 router-id 2.2.2.2 network 10.0.0.0 0.0.0.3 area 0 network 10.0.0.4 0.0.0.3 area 0 default-information originate --- Gateway of last resort is not set 10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks C 10.0.0.0/30 is directly connected, GigabitEthernet0/1 L 10.0.0.2/32 is directly connected, GigabitEthernet0/1 C 10.0.0.4/30 is directly connected, GigabitEthernet0/0 L 10.0.0.5/32 is directly connected, GigabitEthernet0/0 O 192.168.11.0/24 [110/2] via 10.0.0.1, 00:30:14, GigabitEthernet0/1 O 192.168.22.0/24 [110/2] via 10.0.0.6, 00:37:44, GigabitEthernet0/0 

R03: interface GigabitEthernet0/1 ip address 10.0.0.6 255.255.255.252 duplex auto speed auto media-type rj45 ! interface GigabitEthernet0/3 no ip address duplex auto speed auto media-type rj45 ! interface GigabitEthernet0/3.10 encapsulation dot1Q 10 ip address 192.168.22.254 255.255.255.0 ! router ospf 10 router-id 3.3.3.3 network 10.0.0.4 0.0.0.3 area 0 network 192.168.22.0 0.0.0.255 area 0 default-information originate --- Gateway of last resort is not set 10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks O 10.0.0.0/30 [110/2] via 10.0.0.5, 00:38:01, GigabitEthernet0/1 C 10.0.0.4/30 is directly connected, GigabitEthernet0/1 L 10.0.0.6/32 is directly connected, GigabitEthernet0/1 O 192.168.11.0/24 [110/3] via 10.0.0.5, 00:30:20, GigabitEthernet0/1 192.168.22.0/24 is variably subnetted, 2 subnets, 2 masks C 192.168.22.0/24 is directly connected, GigabitEthernet0/3.10 L 192.168.22.254/32 is directly connected, GigabitEthernet0/3.10 

SW01: interface GigabitEthernet1/3 switchport trunk encapsulation dot1q switchport mode trunk media-type rj45 negotiation auto ! interface Vlan10 ip address 192.168.11.253 255.255.255.0 ! ip default-gateway 192.168.11.254 

SW02: interface GigabitEthernet1/3 switchport trunk encapsulation dot1q switchport mode trunk media-type rj45 negotiation auto ! interface Vlan10 ip address 192.168.22.253 255.255.255.0 ! ip default-gateway 192.168.22.254 


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