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Routing concepts - Coggle Diagram
Routing concepts
IP Routing Table
Default route
IPv4: 0.0.0.0/0
IPv6: ::/0
Administrative Distance (AD)
Trust level of a route.
Lower = more trusted.
Route codes
S – static
O – OSPF
C – connected
– candidate default
L – local interface address
Routing table includes
AD
metric
network
next-hop
route source
interface
Path determination
Directly connected networks are added when an interface is configured and active.
Routers learn about remote networks via
Static routes
Dynamic routing protocols like EIGRP and OSPF
Routers choose the best path using the longest match in the routing table.
Packet Forwarding
After selecting the path
Examines the destination IP.
Finds the longest prefix match.
Receives the packet.
Encapsulates and forwards it via the egress interface.
If no match exists, the packet is dropped.
Static and Dynamic Routing
Dynamic routing is used
When automatic path updates are needed.
For scalability and adaptability.
In larger networks.
Static routes are used
For external networks not in the routing domain.
To define explicit paths.
As default routes.
In stub networks.