... Cisco TAC Tools for Routing Protocol Technologies.Related InformationIP Routing Top Issues• More IP Routing Technical Tips• EIGRP Technical Tips• More Routing Protocols Technical Tips• All contents ... examine the interaction between the routing protocols and the routing table to understand how therouting table is built.Building the Routing TableAs each routing process receives updates and ... same destination in the routing table, the installation attempt fails.For protocols that have their own database of routing information, such as EIGRP, IS−IS, OSPF, BGP, andRIP, a backup route is...