Router that runs ospf protocol have 3 equal-cost paths in my network. There is a special application that brings out large traffic from host A to host B every night. I find this traffic was always passed through the special path during 3 equal-cost paths. So I am confused that how Ospf equal-cost load balancing work.
If 4 equal cost paths exist, When the ospf network is sync for the first time which path does router select for the first packet? Which factors will affect this seletion?
The routing equal cost loadbalancing has two stages
First the RIB table which built from the routing table which is where you can see the routi g protocol install multiple exit interfaces for the same destination network
Once these interfaces installed the FIB tab,e will be built using CEF ad RIB cef will distribute the traffic or load balance it in a per session "source - destination " and that's why you see the traffic using only one exit interface
This can be change to be per packet load sharing but it has several disadvantages such as tcp out of sequence and high CPU utilization
You can do some more research and testing on this if you like to try it
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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