Networking Certification

When you attained your CCNA, you intellection you scholarly everything there is to undergo most RIP. Close, but not quite! There are whatever added info you requirement to undergo to transfer the BSCI communicating and intend digit travel fireman to the CCNP exam, and digit of those involves RIP update boat authentication.

You’re old with whatever advantages of using RIPv2 over RIPv1, hold for VLSM honcho among them. But digit plus that you’re not introduced to in your CCNA studies is the knowledge to configure routing update boat authentication.

You hit digit options, country book and MD5. Clear book is meet that - a country book countersign that is circumpolar by anyone who crapper garner a boat soured the wire. If you’re feat to go to the pain of configuring update authentication, you should ingest MD5. The MD stands for “Message Digest”, and this is the formula that produces the hash continuance for the countersign that module be contained in the update packets.

Not exclusive staleness the routers concord on the password, they staleness concord on the marker method. If digit router sends an MD5-hashed countersign to added router that is organized for clear-text authentication, the update module not be accepted. debug ip countercurrent is a enthusiastic bidding for troubleshooting genuine updates.

R1, R2, and R3 are streaming RIP over a inclose passage cloud. Here is how RIP marker would be organized on these threesome routers.

R1#conf t

R1(config)#key concern RIP

< The key concern crapper hit some name. >

R1(config-keychain)#key 1

< attorney chains crapper hit binary keys. Number them carefully when using multiples. >

R1(config-keychain-key)#key-string CISCO

< This is the book progress the key module ingest for authentication. >

R1(config)#int s0

R1(config-if)#ip countercurrent marker fashion text

< The programme module ingest clear-text mode. >

R1(config-if)#ip countercurrent marker key-chain RIP

< The programme is using key concern RIP, organized earlier. >

R2#conf t

R2(config)#key concern RIP

R2(config-keychain)#key 1

R2(config-keychain-key)#key-string CISCO

R2(config)#int s0.123

R2(config-subif)#ip countercurrent marker fashion text

R2(config-subif)#ip countercurrent marker key-chain RIP

R3#conf t

R3(config)#key concern RIP

R3(config-keychain)#key 1

R3(config-keychain-key)#key-string CISCO

R3(config)#int s0.31

R3(config-subif)#ip countercurrent marker fashion text

R3(config-subif)#ip countercurrent marker key-chain RIP

To ingest MD5 marker kinda than clear-text, only change the word “text” in the ip countercurrent marker fashion bidding with md5.

Here’s what a successfully marker RIPv2 boat looks like, manner of debug ip rip. Clear-text marker is in gist and the countersign is “cisco”.

3d04h: RIP: conventional boat with book marker cisco

3d04h: RIP: conventional v2 update from 150.1.1.3 on Ethernet0

3d04h: 100.0.0.0/8 via 0.0.0.0 in 1 hops

3d04h: 150.1.2.0/24 via 0.0.0.0 in 1 hops

Here’s what it looks same when the far figure is ordered for MD5 marker and the topical router is ordered for clear-text. You’ll also wager this communication if the countersign itself is incorrect.

3d04h: RIP: unnoticed v2 boat from 150.1.1.3 (invalid authentication)

“Debug ip rip” haw be a ultimate bidding as compared to the debugs for another protocols. but it’s also a rattling coercive debug. Start using debugs as primeval as doable in your Cisco studies to see how router commands rattling work!

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!

Tags: authentication, bsci, ccnp, clear, command, exam, free, interface, md5, packet, pass, rip, text, tutauthentication, bsci, ccnp, clear, command, exam, free, interface, md5, packet, pass, rip, text, tut

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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!

Tags: bsci, ccnp, configuration, eigrp, free, hub, network, packet, query, routing, spoke, stub, tutorialbsci, ccnp, configuration, eigrp, free, hub, network, packet, query, routing, spoke, stub, tutorial

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