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).
Does OSPF do equal cost load balancing?
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.
Does OSPF support unequal load balancing?
RIP and OSPF both can do load-balancing but the paths have to be equal. …
unequal load-balancing
! Even better it will share traffic in a proportional way, if you have a feasible successor that has a feasible distance which is 5 times worse than the successor then traffic will be shared in a 5:1 way.
Which protocol supports load balancing?
A: An Application Load Balancer supports load balancing of applications using
HTTP and HTTPS (Secure HTTP) protocols
.
What is the main purpose of OSPF?
The OSPF (Open Shortest Path First) protocol is one of a family of IP Routing protocols, and is an Interior Gateway Protocol (IGP) for the Internet,
used to distribute IP routing information throughout a single Autonomous System (AS) in an IP network
.
How does BGP do load balancing?
BGP load balancing through route recursion
The matching route with the direct next hop is called the recursive route. The process of finding a recursive route is route recursion. If multiple recursive routes to
the same destination
are load balanced, BGP generates the same number of next hops to forward packets.
How does OSPF calculate cost?
Open Shortest Path First (OSPF) uses “Cost” as the value of metric and uses a Reference Bandwidth of 100 Mbps for cost calculation. The formula to calculate the cost is
Reference Bandwidth divided by interface bandwidth
. For example, in the case of 10 Mbps Ethernet , OSPF Metric Cost value is 100 Mbps / 10 Mbps = 10.
What is the advantage of unequal cost load balancing?
the capability to do unequal-cost load balancing, the capability to load-balance traffic over multiple paths that do not have the same metric to the destination. The advantage of this feature is that it
offers the flexibility of load balancing
, thus making more efficient use of the link.
Does BGP support unequal cost load balancing?
On Cisco routers, by
default the BGP protocol will not do load-sharing
– and even less unequal cost load-sharing – across multiple links, for traffic to the same eBGP destination with different AS-path. … and AS-path attributes are the same across the different uplinks.
Does Rip support unequal cost load balancing?
RIP cannot perform unequal-cost load balancing
.
Does VRRP support load balancing?
A VRRP group in
load balancing mode is used to implement load balancing
. The configuration roadmap is as follows: Assign an IP address to each interface and configure a routing protocol to ensure network connectivity.
What is equal cost load balancing?
Equal-cost load balancing, as its name implies, is
the balancing of a traffic load across redundant links of equal cost
. … This alleviates the potential for problems caused by per-packet load balancing but can result in a somewhat less than perfect distribution of traffic across equal-cost links.
Which FHRP supports load balancing?
Gateway Load Balancing Protocol (GLBP)
– Cisco-proprietary FHRP that protects data traffic from a failed router or circuit, like HSRP and VRRP, while also allowing load balancing (also called load sharing) between a group of redundant routers.
What are the benefits of OSPF protocol?
- Both IPv4 and IPv6 routed protocols.
- Load balancing with equal cost routes for same destination.
- VLSM and route summarization.
- Unlimited hop counts.
- Trigger updates for fast convergence.
- A loop free topology using SPF algorithm.
- Run on most routers.
- Classless protocol.
Which layer is OSPF?
OSPF and BGP belong to the
Application Layer
.
Why OSPF is preferred over BGP?
Scale: BGP is more flexible and scalable than OSPF and it is also used on a larger network. Preferred path:
OSPF is used to determine the fastest route while BGP puts emphasis on determining the best path
.
