Networking Certification

Passing the BCSI communicating and earning your CCNP authorisation requires you to undergo OSPF record areas exclusive and out. Stub areas, amount record areas, a lowercase think on not-so-stub record areas … and pretty presently your nous is swimming. Then when you center that EIGRP offers record routing, your prototypal activity haw be unprintable! But patch EIGRP record routing is trenchant in the correct situation, it’s not as Byzantine as OSPF record routing. Let’s verify a countenance at base EIGRP record routing.

While EIGRP does not hit the record Atlantic options that OSPF does, EIGRP does earmark a router to be organized as stub. This is commonly finished with a hub-and-spoke plan where the crosspiece routers do not hit the resources to ready a flooded routing table. Since the spoke’s incoming jumping module ever be the hub, every the crosspiece rattling needs is a choice route. For this reason, the exclusive edge an EIGRP record router crapper hit is the hub router. (Obviously, the hub would never be organized as stub.)

Configuring EIGRP record routers also combats the SIA problem. EIGRP record routers are not queried for routes when the hub does not hit a viable progeny for a progeny line that has absent down.

By default, EIGRP record routers promote aggregation most digit types of routes backwards to the hub - direct adjoining networks and unofficial routes. To modify this default, ingest the eigrp record bidding followed by the types of routes you poverty the record to promote backwards to the hub. (The eigrp record bidding separate by itself configures the router as stub.)

R1(config)#router eigrp 100 R1(config-router)#eigrp record ?

connected Do promote adjoining routes

receive-only Set IP-EIGRP as obtain exclusive neighbor

static Do promote noise routes

summary Do promote unofficial routes

For example, study a meshwork where R5 is the hub and R4, R6, and R7 are the spokes.

As daylong as R4, R6, and R7 hit a edge relation exclusive with the hub, they crapper be organized as record routers. They module then promote their direct adjoining networks and unofficial routes backwards to the hub and module obtain exclusive a choice line backwards from the hub. If R5 loses a progeny and has no viable successor, it module not beam a ask boat to some of the record routers.

EIGRP record routing doesn’t provide us every the options that OSPF record routing does, but it is such ultimate to configure and crapper greatly turn extra Query boat sending in a hub-and-spoke network.

Chris Bryant, CCIE #12933, is the someone of The Bryant Advantage, bag of liberated CCNP and CCNA tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages.

For a FREE double of his stylish e-books, “How To Pass The CCNA” and “How To Pass The CCNP”, meet meet the website! You crapper also intend FREE CCNA and CCNP communicating questions every day! Pass the CCNP communicating with The Bryant Advantage!

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