Cisco OSPF

Open Shortest Path First

Grannskap

Neighbors måste komma överens om:

Set your maximum LSA settings to keep from killing weak boxes
Baseline your network so you know how many LSAs normally float around
Configure LSA warnings to alert of problems
Crash each type of box on your network in a lab environment so you know what it will do under stress.

router ospf [process-id]

router-id for this OSPF process (in IP address format)

router-id [OSPF router-id]

log-adjacency-changes

Enable routing on an IP network

network [network-number] [wildcard-mask] area [area-id]

Enable MD5 authentication in Area 0

area 0 authentication message-digest

Enable OSPF authentication on an interface

interface [interface]
ip ospf message-digest-key 10 md5 [password]
exit

Suppress routing updates on an interface

passive-interface [interface]

default-information originate

interface [interface]
ip ospf priority [number]
exit

ABR Summarization

router ospf 1
area 10 range 10.10.0.0 255.255.252.0
exit

ASBR Summarization

router ospf 1
summary-address 10.10.0.0 255.255.252.0
exit

Uppdatera reference bandwidth till 100G

router ospf 1
auto-cost reference-bandwidth 100000
exit

loopback - ospf

ip ospf network point-to-point
exit

show ip ospf neighbor
ping 224.0.0.5
show ip ospf interface brief
show ip protocols