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OSPF best practice for COST

If hardware is all the same, what's best practice for OSPF cost?


Left:
Egress and ingress are opposite of one another.  (Egress/Ingress are not on the same connection)  I like this setup, but i'm not sure if its best practice compared to the far right picture.  I prefer this idea because inflow/outflow aren't shared on a link, but is this enough justification to be BP?

Middle:
Each core will be responsible for their "side". (Left core/distro vs right core/distro)  Not sure if this is correct...i'm just guessing

Right:
Primary/Secondary setup.  (Left core takes care of everything, Right Core is backup)
OSPF-FLOW.png
CiscoNetworkingNetworking ProtocolsNetwork Architecture

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Predrag Jovic
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Networking
Networking

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

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