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Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) · Cisco
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as explanation why it is C: The output is from a spoke. You can tell at then end of the exhibit where it receives update from 192.168.1.1 (the OSPF RID of the hub router) and sends a packet to the other spoke router. The OSPF's adjacencies are not forming. Why? By default GRE tunnel interfaces are POINT-TO-POINT when enabled OSPF for a tunnel. In our case our spoke is trying to establish 2 adjacencies. One with the Hub router and one with the spoke. One adjacency is replacing the other, on the POINT-TO-POINT tunnel. So we need to make point-to-multipoint on our spoke. But if trying to form adjacency with other spoke, then other spoke is forming 2 adjacencies as well. so it needs point to multipoint as well.
show run interface Tunnel1 ip address 44.44.44.44 255.255.255.0 no ip redirects ip ospf 1 area 1 tunnel source Ethernet0/1 tunnel mode gre multipoint IOU2#show ip ospf interface tunnel 1 Tunnel1 is up, line protocol is down Internet Address 44.44.44.44/24, Area 1, Attached via Interface Enable Process ID 1, Router ID 5.5.5.6, Network Type POINT_TO_POINT, Cost: 1000
Sorry, but i don't understand why it is not B. if you have metric type 1 in R2, it will add to the default cost of 20 the cost of the link to Isp2, isn't it? The cost of type 2 is always 20