Book · June 023 doi: 10. 5281/zenodo. 8041398 citations reads 1,440 author

Note: The Network 11.0.0.0 has been removed because it was configured in OSPF router. 
Ensuring the Routing Table of Router-3: 
Router#sh ip route 
Codes: C - connected, S - static, I - IGRP, 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, E - EGP 
i - IS-IS, 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 
Gateway of last resort is not set 
C 13.0.0.0/8 is directly connected, FastEthernet0/0 
Note:
• The Network 12.0.0.0 has been removed because it was configured in OSPF router. 
• OSPF Router will send the updates only to the Routers those are configured with OSPF. 
• OSPF: Triggered Updates means whenever changes in the network happens, it will send an 
updates to the neighbor router of OSPF. 
 
For Routing Details Distribution Configure OSPF in Router-1 & 3 also. So these Routers are 
running RIP and OSPF protocols.. 
 
 
 

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OSPF in Router-1: 
Router(config)#router ospf 1 
Router(config-router)#network 10.0.0.0 0.255.255.255 area 1 
Router(config-router)#network 11.0.0.0 0.255.255.255 area 1 
OSPF in Router-3: 
Router(config)#router ospf 1 
Router(config-router)#network 13.0.0.0 0.255.255.255 area 1 
Router(config-router)#network 12.0.0.0 0.255.255.255 area 1 
 
After Configuration Routing table in Router-1: 
Router#sh ip route
Codes: C - connected, S - static, I - IGRP, 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, E - EGP 
i - IS-IS, 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 
Gateway of last resort is not set 
C 10.0.0.0/8 is directly connected, FastEthernet0/0 
C 11.0.0.0/8 is directly connected, Serial0/0/0 
O 12.0.0.0/8 [110/128] via 11.0.0.2, 00:09:42, Serial0/0/0 
O 13.0.0.0/8 [110/129] via 11.0.0.2, 00:09:42, Serial0/0/0