ASA ROUTING OSPF

ASA SUPPORTS IPV4 ROUTING VIA ...

1. Static routes
2. RIP V1/V2
3. OSPF
4. EIGRP & ..

OSPF (To route 100.100.100.100/24)

#conf t (Configuration mode)
#router ospf 1 (Calling router ospf mode with process ID as 1)
#router-id 1.1.1.1
#network 100.100.100.100 255.255.255.0 area 0 (Advertising 100.100.100.100/24)

We also have a other way of doing this as:

#interface gi1 (Pre configured)
#ip address 100.100.100.100 255.255.255.0 (Pre configured)
#security level 100 (Pre configured)
#nameif Inside (Pre configured)
#no shut (Pre configured)
#ip ospf 1 area 0 (Stating interface gi1 to be advertised by OSPF)

Verification which interface is been advertised by the ASA by OSPF

#show ospf interface

#show run | grep ospf

WE CAN ALSO AUTHENTICATE OUR LSA

#conf t (Configuration mode)
#int gi 1 (interface to configure)
#ospf authentication message-digest (Asking OSPF LSA to be authenticated by message-digest)
#ospf message-digest-key 1 md5 CcieSec@123 (Stating key to be used in message-digest)

WE CAN ALSO DEFINE WHO WILL BE OUR DR OR BDR BY DEFINING PRIORITY

#conf t (Configuration mode)

#int gi 1 (interface to configure)

#ospf priority 100 (Stating the priority on which DR or BDR is elected)