Does OSPF load balance by default?

Does OSPF load balance by default?

OSPF load balances across equal cost paths to the same destination by default. If the destination is connected to R1 then R2 will never load balance across the direct path to R1 and the indirect path through R3 because they are not equal cost.

How does OSPF load balancing Work?

If equal-cost paths exist to the same destination, the Cisco implementation of OSPF can keep track of up to 16 next hops to the same destination in the routing table (which is called load balancing). By default, the Cisco router supports up to four equal-cost paths to a destination for OSPF.

What is OSPF default information?

Configures OSPF to advertise the default route (0.0. 0.0/0) to its neighbors, regardless if it is present in the routing table or not. The no form of this command sets the OSPF administrative distance to the default of 110.

Does OSPF support unequal load balancing?

OSPF defaults to equal-cost load balancing. In other words, it load-shares across equal-cost links only. In order to enable OSPF unequal-cost load balancing, you use the bandwidth command on the interface.

Does EIGRP load balance by default?

EIGRP load balancing By default, EIGRP supports equal-cost load balancing over four links. Equal-cost means that multiple routes must have the same metric to reach the destination, so that router can choose to load balance across equal cost links.

What is load balancing in router?

Network load balancing (commonly referred to as dual-WAN routing or multihoming) is the ability to balance traffic across two or more WAN links without using complex routing protocols like BGP. This capability balances network sessions like Web, email, etc.

What is default route propagation OSPF?

If a default route is already in present in routing table, such as via static or dynamic protocol, OSPF originate default route. If default route does not exist in routing table, OSPF will not originate default route. This behavior is desirable when there are multiple exist point out of OSPF domain to external network.

What is the default priority for OSPF routers?

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Default priority for an OSPF interface is 1. The range is from 0 to 255. 0 means that the interface does not involve in the DR election. The following command configures a priority value on an interface.

How does OSPF generate default routes?

To generate a default route, you use the default-information originate command. This command presents two options: You can advertise 0.0. 0.0 into the OSPF domain, provided the advertising router already has a default route.

What is unequal load balancing?

To accomplish unequal-cost load balancing, the variance command is used. The command takes one parameter, the multiplier, which tells the router to load balance across each link with the metric for the destination less than the feasible distance multiplied by the multiplier value.

Is OSPF a classless or Classful protocol?

The classless IPv4 routing protocols (RIPv2, EIGRP, OSPF, and IS-IS) all include the subnet mask information with the network address in routing updates. Classless routing protocols support VLSM and CIDR. IPv6 routing protocols are classless.