Friday, July 23, 2010

CCNP - ENTERPRISE - Study pointers - OSPF

My notes study notes for OSPF:

  • When configuring a virtual link you specify the are to be traversed plus the Router I.D. of the end point.
  •  e.g. - R1(config-router)#area 5 virtual link
  •  Then on remote router: R3(config-router)#area 5 virtual-link
  • When working on a Frame-relay environment you need to enter the network type cmd under the OSPF process:
  • R2(config-router)#ip ospf network non-broadcast
  • At the interface you need to set OSPF priority to prevent DR election on the routers that will not be a DR:
  • R2(config-if)#ip ospf priority 0
  • An INIT state can exist when a router ID has not been seen in a received Hello Packet
  • A Stub area doesn't accept information from outside of the OSPF AS
  • ABR's maintain a separate link-state database for each area they are attached to.

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