Cisco CCNP / BSCI Exam Tutorial: The Passive Interface Command And OSPF - 0 views

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  #1 Scarborough Strauss on 14 Jan 14

   

  To move the BSCI exam and develop into a CCNP, you have to keep yourself informed of the appropriate use of passive interfaces. You learned about passive interfaces in your CCNA reports, but here well review the essential principle and clear up one belief regarding passive interfaces and OSPF.
  
  Making an as passive will still permit the interface for routing updates, but they will be longer transmitted by the interface no. That's false, while the command itself will make you believe this command will undoubtedly be applied at the level. Below, well configure ethernet0 as a RIP passive interface.
  
  R1( config )#router rip
  
  R1( config-router )#passive-interface ethernet0
  
  Ethernet0 will no further deliver RIP routing updates, but will accept them.
  
  The passive interface concept is clear enough with RIP, IGRP, and EIGRP all protocols that send routing update packets. Get more on tracy ryan by going to our riveting web resource. But OSPF doesnt deliver routing update packets OSPF delivers link state adverts. Their the shortcoming of the passive interface control to prevent LSAs that cause many to believe that passive interfaces can't be used with OSPF.
  
  in order to reduce OSPF traffic from leaving or entering that interface even though OSPF does not sent "routing updates" in the form that RIP, IGRP, and EIGRP do, it is possible to still configure an interface as passive. No OSPF adjacency could be produced if one of the interfaces involved is just a passive interface, and if you configure an interface as passive where an currently exists, the adjacency will drop very nearly instantly.
  
  Let us observe that for action. R2 and R1 have a preexisting OSPF adjacency over their Ethernet interfaces. In an effort to reduce routing traffic, R1's e0 interface is constructed as passive. The adjacency drops immediately.
  
  R1( config )#router ospf 1
  
  R1( config-router )#passive-interface ethernet0
  
  18:31:11: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Ethernet0 from FULL to DOWN, Neighbor Down: Interface down or separate
  
  Knowing how to use the passive interface control is a vital part of being a CCNP, and to be a master networker. All the best for you in these two activities!.Jett Media Group
  5209 Wilshire Blvd.
  Los Angeles, CA 90036
  (323) 592-3613

   

  <div class="cArrow"> </div><div class="cContentInner">To move the BSCI exam and develop into a CCNP, you have to keep yourself informed of the appropriate use of passive interfaces. You learned about passive interfaces in your CCNA reports, but here well review the essential principle and clear up one belief regarding passive interfaces and OSPF. <br /> <br /> Making an as passive will still permit the interface for routing updates, but they will be longer transmitted by the interface no. That's false, while the command itself will make you believe this command will undoubtedly be applied at the level. Below, well configure ethernet0 as a RIP passive interface. <br /> <br /> R1( config )#router rip <br /> <br /> R1( config-router )#passive-interface ethernet0 <br /> <br /> Ethernet0 will no further deliver RIP routing updates, but will accept them. <br /> <br /> The passive interface concept is clear enough with RIP, IGRP, and EIGRP all protocols that send routing update packets. Get more on <a rel="nofollow" href="http://events.triangle.com/los_angeles_ca/venues/show/14812343-jett-media-group">tracy ryan</a> by going to our riveting web resource. But OSPF doesnt deliver routing update packets OSPF delivers link state adverts. Their the shortcoming of the passive interface control to prevent LSAs that cause many to believe that passive interfaces can't be used with OSPF. <br /> <br /> in order to reduce OSPF traffic from leaving or entering that interface even though OSPF does not sent "routing updates" in the form that RIP, IGRP, and EIGRP do, it is possible to still configure an interface as passive. No OSPF adjacency could be produced if one of the interfaces involved is just a passive interface, and if you configure an interface as passive where an currently exists, the adjacency will drop very nearly instantly. <br /> <br /> Let us observe that for action. R2 and R1 have a preexisting OSPF adjacency over their Ethernet interfaces. In an effort to reduce routing traffic, R1's e0 interface is constructed as passive. The adjacency drops immediately. <br /> <br /> R1( config )#router ospf 1 <br /> <br /> R1( config-router )#passive-interface ethernet0 <br /> <br /> 18:31:11: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Ethernet0 from FULL to DOWN, Neighbor Down: Interface down or separate <br /> <br /> Knowing how to use the passive interface control is a vital part of being a CCNP, and to be a master networker. All the best for you in these two activities!.Jett Media Group <br /> 5209 Wilshire Blvd. <br /> Los Angeles, CA 90036 <br /> (323) 592-3613</div>

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