Default Maximum Number of Equal-Cost Paths in OSPF Routing Table

D

The default maximum number of equal-cost paths that can be placed into the routing table of a Cisco OSPF router is D. 4.

In OSPF, equal-cost multipath (ECMP) routing is used to distribute traffic over multiple paths that have the same cost to a destination network. By default, OSPF can place up to 4 equal-cost paths into the routing table.

This value is controlled by the OSPF maximum-paths command, which can be configured globally or per OSPF process. If you want to increase the maximum number of equal-cost paths that can be placed into the routing table, you can use this command to specify a larger value.

It's worth noting that the maximum-paths command only affects equal-cost paths. If there are paths with different costs, OSPF will still choose the lowest cost path as the best path, regardless of the maximum-paths setting.

Overall, the default maximum number of equal-cost paths that can be placed into the routing table of a Cisco OSPF router is 4, which can be increased by using the maximum-paths command.