Configure OSPF on Cisco ASA Firewall | CCNP & CCIE Security Training
#ciscoasafirewall #ospfonasa #imedita #cciesecurity
In this video, you are going to learn about Configure OSPF on Cisco ASA Firewall. Cisco ASA OSPF Configuration is an essential concept in CCNP Security and CCIE Security Examination blueprints. Watch this video and master How to Configure OSPF on Cisco ASA Firewall.
🟩 The video is demonstrated by Mr. Baldev Singh CCIE Security # 37094.
🛑 Information About OSPF?
OSPF is an interior gateway routing protocol that uses link states rather than distance vectors for path selection. OSPF propagates link-state advertisements rather than routing table updates. Because only LSAs are exchanged instead of the entire routing tables, OSPF networks converge more quickly than RIP networks.
OSPF uses a link-state algorithm to build and calculate the shortest path to all known destinations. Each router in an OSPF area contains an identical link-state database, which is a list of each of the router usable interfaces and reachable neighbors.
The advantages of OSPF over RIP include the following:
OSPF link-state database updates are sent less frequently than RIP updates, and the link-state database is updated instantly, rather than gradually, as stale information is timed out.
Routing decisions are based on cost, which is an indication of the overhead required to send packets across a certain interface. The ASA calculates the cost of an interface based on link bandwidth rather than the number of hops to the destination. The cost can be configured to specify preferred paths.
The disadvantage of the shortest path first algorithms is that they require a lot of CPU cycles and memory.
The ASA can run two processes of OSPF protocol simultaneously on different sets of interfaces. You might want to run two processes if you have interfaces that use the same IP addresses (NAT allows these interfaces to coexist, but OSPF does not allow overlapping addresses). Or you might want to run one process on the inside and another on the outside, and redistribute a subset of routes between the two processes. Similarly, you might need to segregate private addresses from public addresses.
You can redistribute routes into an OSPF routing process from another OSPF routing process, a RIP routing process, or from static and connected routes configured on OSPF-enabled interfaces.
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