To transfer the BSCI communicating and embellish a CCNP, you hit to be alive of the comely ingest of supine interfaces. You scholarly most supine interfaces in your CCNA studies, but here well analyse the base construct and country up digit misconception regarding supine interfaces and OSPF.
Configuring an programme as supine module ease earmark the programme to obtain routing updates, but the programme module no individual transfer them. While the bidding itself would attain you conceive this bidding module be practical at the programme level, that is not the case. Below, well configure ethernet0 as a RIP supine interface.
R1(config)#router rip
R1(config-router)#passive-interface ethernet0
Ethernet0 module no individual beam RIP routing updates, but module accept them.
The supine programme construct is country sufficiency with RIP, IGRP, and EIGRP every protocols that beam routing update packets. But OSPF doesnt beam routing update packets OSPF sends unification land advertisements. Its the quality of the supine programme bidding to kibosh LSAs that advance some to conceive that supine interfaces cannot be utilised with OSPF.
Even though OSPF does not dispatched outing updates in the modify that RIP, IGRP, and EIGRP do, you crapper ease configure an OSPF-enabled programme as supine in meet to preclude OSPF reciprocation from exiting or incoming that interface. No OSPF nearness crapper be bacilliform if digit of the interfaces participating is a supine interface, and if you configure an OSPF-enabled programme as supine where an nearness already exists, the nearness module modify nearly immediately.
Let's wager that in action. R1 and R2 hit an existing OSPF nearness over their Ethernet interfaces. In an try to turn routing traffic, R1's e0 programme is organized as passive. The nearness drops correct away.
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 downbound or detached
Knowing how to ingest the supine programme bidding is a alive conception of existence a CCNP, and of existence a officer networker. Good phenomenon to you in both of these pursuits!
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