OSPF Visibility of the Network.

jskfan
jskfan used Ask the Experts™
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OSPF Visibility of the Network.

Unlike RIP and EIGRP, OSPF is a Link State protocol, what does that mean ? does it mean a router configured with OSPF knows the topology in every router that is configured with OSPF ?at least the routers that are in t same area ?

Reading about SDN , this technology has a capability to have visibility of the whole network topology.  is it the same as OSPF routers in the same area ?

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Sr.Net.Eng
Top Expert 2011
Commented:
Yes, in OSPF every router in an area keeps a copy of the OSPF database thus being aware of all link states in the area. Where as, like they say EIGRP and RIP is routing by rumor, only knowing what routes are available based on what the next router tells them.  OSPF and SDN is similar in knowing the whole topology. SDN moreso because it is essentially centralized routing using some type of controller.

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Commented:
OSPF and SDN is similar in knowing the whole topology. SDN moreso because it is essentially centralized routing using some type of controller.

if OSPF is configured with so many areas. SDN will know the whole topology of all areas. in OSPF , each router will know just about the topology of the areas it is configured with. [one router can be in more than one area]


Correct ?

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