Showing posts with label troubleshooting. Show all posts
Showing posts with label troubleshooting. Show all posts

Monday, October 21, 2013

Cisco ccnp bsci certification troubleshooting route redistribution part i


Cisco CCNP / BSCI Certification: Troubleshooting Route Redistribution, Part I


Route redistribution looks easy, but there are details you must master to pass the CCNP exams and become a master networker. Learn how to troubleshoot one common redistribution error from Chris Bryant, CCIE #12933.


Ccnp, bsci, exam, certification, pass, route, redistribution, subnets, ospf, rip, bgp, table, show, ip , route, version, 2


If there's one CCNP / BSCI topic that looks so easy but can lead to a real headache, it's route redistribution. I'm not even talking about the routing loops and suboptimal routing that can result when route redistribution is done without proper planning - I'm talking about the basic commands themselves. Leaving out one single command option, or forgetting what else needs to be redistributed when redistributing dynamically discovered routes, can leave you with a routing table that looks complete but does not result in full IP connectivity.

In this free CCNP / BSCI tutorial series, we'll take a look at three common errors in route redistribution configurations, and how to fix them. We'll use three routers, R1, R3, and R5. R1 and R5 are in a RIPv2 domain and R1 and R3 are in an OSPF domain. R1 will be performing two-way route redistribution.

R5 is advertising its loopback, 5.5.5.5/24, into the RIPv2 domain. R1 sees this route in it

 



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Cisco ccnp bsci exam tutorial configuring and troubleshooting ospf virtual links


Cisco CCNP / BSCI Exam Tutorial: Configuring And Troubleshooting OSPF Virtual Links


Configuring and troubleshooting OSPF virtual links are skills you'll need to pass the BSCI exam. Learn these skills from Chris Bryant, CCIE #12933.


cisco, ccnp, certification, bsci, ospf, virtual, links, stub, total, area, ccna, pass, free, transit


Knowing when and how to create an OSPF virtual link is an essential skill for BSCI and CCNP exam success, not to mention how important it can be on your job! As a CCNA and CCNP candidate, you know the theory of virtual links, so let's take a look at how to configure a virtual link, as well as some real-world tips that many CCNA and CCNP study guides leave out!

In this configuration, no router with an interface in Area 4 has a physical interface in Area 0. This means a logical connection to Area 0, a virtual link, must be built.

In the following example, R1 and R3 are adjacent and both have interfaces in Area 0. R4 has an adjacency with R3 via Area 34, but R4 has no physical interface in Area 0 and is advertising its loopback 4.4.4.4 into OSPF. R1 doesn't have the route to that loopback.

R1#show ip route ospf

6.0.0.0/32 is subnetted, 1 subnets

O 6.6.6.6 [110/11] via 10.1.1.5, 01:05:45, Ethernet0

172.23.0.0/27 is subnetted, 1 subnets

 



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