Router RTRA is adjacent to RTRB through a WAN link. RTRB can be seen in the output of the show cdp neighbors command issued on RTRA, can be pinged from RTRA, but is not showing OSPF routes from RTRA. What are two potential issues? (Choose two.)
- There are duplicate IP addresses on the interfaces that connect RTRA and RTRB.
- One or both routers are missing or have a misconfigured network statement.
- Each interface that connects the routers has been set to priority 0.
- A clock rate has not been installed on the DCE side of the link.
- A distribute list is denying routes from being installed in the routing table.
Explanation: The fact that RTRB can be pinged from RTRA indicates that there is connectivity between the two routers. However, the absence of OSPF routes from RTRA suggests that there is a configuration issue.
One potential issue is that one or both routers are missing or have a misconfigured network statement for the OSPF process. OSPF relies on routers to advertise the networks they are connected to by including them in the OSPF domain through the use of network statements. If these statements are missing or misconfigured, the routers will not advertise their networks and OSPF routes will not be available.
Another potential issue is that a distribute list is denying routes from being installed in the routing table. Distribute lists can be used to filter incoming and outgoing OSPF routes based on certain criteria such as prefix, access list, or prefix list. If a distribute list is configured to deny routes from being installed in the routing table, OSPF routes from RTRB may not be available on RTRA.
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