Cisco CCNP / BSCI Test Tutorial: The Passive Interface Command And OSPF
To pass the BSCI Examination and become a CCNP, You need to know about the right utilization of passive interfaces. You uncovered about passive interfaces with your CCNA experiments, but listed here very well evaluation the basic principle and crystal clear up one misconception concerning passive interfaces and OSPF.
Configuring an interface as passive will however allow the interface to obtain routing updates, but the interface will not transmit them. When the command by itself would make you think this command is going to be applied on the interface amount, that isn't the situation. Beneath, perfectly configure ethernet0 to be a RIP passive interface.
R1(config)#router rip
R1(config-router)#passive-interface ethernet0
Ethernet0 will no longer send out RIP routing updates, but will take them.
The passive interface concept is evident sufficient with RIP, IGRP, and EIGRP all protocols http://query.nytimes.com/search/sitesearch/?action=click&contentCollection®ion=TopBar&WT.nav=searchWidget&module=SearchSubmit&pgtype=Homepage#/Acheter des Followers Instagram that mail routing update packets. But OSPF doesnt send routing update packets OSPF sends website link condition commercials. Its The lack with the passive interface command to stop LSAs that guide many to Acheter des Followers Instagram feel that passive interfaces can not be applied with OSPF.
While OSPF will not despatched “routing updates” in the form that RIP, IGRP, and EIGRP do, you can even now configure an OSPF-enabled interface as passive so that you can avoid OSPF traffic from exiting or entering that interface. No OSPF adjacency is usually fashioned if on the list of interfaces concerned is often a passive interface, and when you configure an OSPF-enabled interface as passive in which an adjacency now exists, the adjacency will drop shortly.
Enable’s see that in motion. R1 and R2 have an existing OSPF adjacency around their Ethernet interfaces. In an effort to reduce routing site visitors, R1’s e0 interface is configured as passive. The adjacency drops without delay.
R1(config)#router ospf one
eighteen:31:eleven: %OSPF-five-ADJCHG: Course of action one, Nbr 2.2.2.2 on Ethernet0 from Complete to DOWN, Neighbor Down: Interface down or detached
Being aware of ways to utilize the passive interface command is a significant part of getting a CCNP, and of currently being a grasp networker. Excellent luck to you in equally of those pursuits!