OSPF generator

Area planning, network statements and passive interfaces. Cisco output uses wildcard masks, which are the inverse of the subnet mask.

Process

The default of 100 gives every link above 100 Mbps a cost of 1, so the metric stops distinguishing them. Set it above your fastest link.

Networks

Export
ospf.txtcisco-ios
16 lines
! Cisco IOS / IOS-XE — OSPF process 1, generated by NetField
! Router IDs must be unique in the domain — a duplicate silently breaks adjacency.
! MTU must match on both ends or adjacency sticks in EXSTART.
! Passive-interface default is on: only listed transit links form adjacency.

configure terminal
!
router ospf 1
 router-id 10.255.0.1
 auto-cost reference-bandwidth 100000
 passive-interface default
 network 10.0.0.0 0.0.0.3 area 0
 network 10.20.0.0 0.0.0.255 area 0
 network 10.21.0.0 0.0.0.255 area 1
!
end