Cisco CCNP/ BSCI Examination Tutorial: OSPF Router Types
When you're preparing to pass the BSCI exam en route to the desired Cisco CCNP certification, you can be rapidly RAMSEY THEORY CAPITAL overwhelmed by the large amount of BGP and OSPF knowledge you must demonstrate a mastery of. One set of information that some BSCI and CCNP prospects take too lightly are the distinctions in between the OSPF router types.
An OSPF Interior router has one regulation-- it has to have all its interfaces in a solitary location. It does not indicate that location needs to be Area 0.
An OSPF Backbone router is a router with at the very least a solitary area in the OSPF foundation area, Area 0. A router can be both an Interior and Foundation router if all its user interfaces remain in Area 0.
A Location Boundary Router has at least one user interface in Location 0 and an additional interface in a non-backbone area. ABRs are additionally a couple of router kinds that can perform OSPF route summarization. (To advertise a summary course from one OSPF area to an additional, utilize the area range command on the ABR.)
Finally, an ASBR is an OSPF router that is carrying out path redistribution by infusing courses from another source into the OSPF domain. This is the various other OSPF router kind that can do course summarization; to summarize paths being redistributed right into OSPF, utilize the summary-address command on the ASBR.
There are a number of commands you can make use of to establish the router key ins a provided OSPF area. The command "show ip ospf" will certainly show quite a bit of info regarding the neighborhood router, and this includes whether that router is functioning as an ABR or ASBR. To see the routes to the ABRs and ASBRs from the neighborhood router, run "show ip ospf border-routers".