In current IOS versions for IPv4 redistribution is a two step process. Let’s suppose that we are trying to redistribute RIPv2 into OSPFv2 by issuing the “redistribute rip subnets” command under the OSPF process. The first thing the router does is to look at the “show ip route rip” output. All of these prefixes are candidate to be redistributed into OSPF. Next the router looks at the “show ip route connected” output. The routes for any connected interfaces from this output running RIPv2 are also candidate to be redistributed into OSPF. In other words, we don’t have to issue the “redistribute connected subnets” to get connected interfaces that run RIP to be sent into the OSPF process.
In previous IOS versions this was not always the case however. In many network designs, especially in service provider environments, transit links themselves are not advertised into the routing domain. Based on this design traffic cannot be sent *to* the network itself, only *through* the network. Over the course of IOS releases however this behavior was mostly updated, and now we see that IPv4 protocols, with the exception of IS-IS, do automatically redistribute their connected interfaces.
For IPv6 whether or not connected links are included in redistribution is up to you at the time of configuration. If we take the previous case for IPv4 and translate it to IPv6 we’ll see that the behavior is not the same. By this I mean that if we issue the “redistribute rip 1” command under the OSPFv3 process, the router will only look at the output of the routes from the “show ipv6 route rip” command, and not the output from the “show ipv6 route connected”. To get connected interfaces to be included in this redistribution we can either issue a separate “redistribute connected” command under OSPFv3, which will take all connected IPv6 interfaces by default, not those just running RIPng, or we can issue the “redistribute rip 1 include-connected” command. This is the preferred design as it gives us more flexibility as to which particular networks we choose to advertise.
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Network Bulls don't provide any Cisco CCNA, CCNP simulations for practice. They Provide High End Trainings on Real topologies for high tech troubleshooting on real Networks. There is a list of Top and best Training Institutes in India, which are providing CCNA and CCNP courses, but NB has a different image from market. Many students has given me their feedbacks and reviews about Network bulls Institute, but there were no complaints about any fraud from this institute. Network Bulls is such a wonderful place to get trained from Industry expert Trainers, under guidance of CCIE Certified Engineers.
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CCIE Security Version 4
Cisco Finally updated CCIE Security Lab exam blueprint. WSA Ironport and ISE devices are added in CCIE Security Version 4 Lab Exam Syllabus Blueprint. In Updated CCIE Security Version 4 Syllabus blueprint, new technologies like Mobile Security, VoIP Security and IPV6 Security along with Network Security, are added. As in CCIE Security Version 3 blueprint, Cisco had focused on Network Security only, but now as per market demand, Cisco is looking forward to produce Internet gear Security Engineer, not only Network Security engineers.
In CCIE Security Version 4 Bluerpint, Lab Exam is going to be more interested than before. What is Difference in CCIE Security Version 3 and Version 4? Just go through the CCIE Security Version 4 Lab Equipment and Lab Exam Syllabus Blueprints and find out!
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