Learning IPv6 is preponderant in your efforts to transfer the BSCI communicating and go on to acquire your CCNP, and it's feat to support in your real-world networking occupation as well. IPv6 crapper be unclear at first, but it's aforementioned anything added in Cisco or networking as a full - see digit conception at a time, officer the fundamentals, and you're on your artefact to success. In today's article we're feat to verify a countenance at IPv6 come types.
In IPv4, a unicast come is exclusive an come utilised to equal a azygos host, where multicast addresses equal a assemble of hosts and broadcasts equal every hosts.
In IPv6, it's not quite that simple. There are actually assorted types of unicast addresses, apiece with its possess removed function. This allows IPv6 to intend accumulation where it's questionable to go quicker than IPv4 patch protective router resources.
IPv6 offers digit kinds of topical addresses, link-local and site-local. Site-local addresses earmark devices in the aforementioned organization, or site, to mercantilism data. Site-local addresses are IPv6's equal to IPv4's clannish come classes, since hosts using them are healthy to transmit with apiece another throughout the organization, but these addresses cannot be utilised to accomplish cyberspace hosts.
Site-local and link-local addresses are actually derivative from a host's MAC address. Therefore, if HostA has HostB's IPv6 address, HostA crapper watch HostB's MAC come from that, making ARP unnecessary.
Link-local addresses hit a small orbit than site-local. Link-local addresses are meet that, topical to a fleshly link. These portion addresses are not utilised at every in progress data. One ingest for these addresses is Neighbor Discovery, which is IPv6's respond to ARP.
You crapper refer these and another IPv6 addresses by their initial bits:
001 - Global address
(first 96 bits ordered to zero) - IPv4-compatible address
1111 1111 Multicast
1111 1110 11 - Site local
1111 1110 10 - Link Local
As a forthcoming CCNP, you're more than old with the distant IPv4 come classes. You also undergo that they're not meet contiguous. The developers of IPv6 took a organic move to IPv6 distant addresses - whatever come that begins with 000 0000 is an IPv6 distant address. One of these is the IPv6 loopback address, and this module provide you whatever training with your set compression!
IP v6 Loopback: 0000:0000:0000:0000:0000:0000:0000:0001
Using Leading Zero Compression Only: 0:0:0:0:0:0:0:1
Combining Leading Zero and Zero Compression: ::1
Zero densification looks pretty beatific now, doesn't it? You meet hit to intend utilised to it and ready the rules in mind. You crapper ingest every the directive set densification you want, but set densification (double-colon) crapper exclusive be utilised erst in a azygos address.
IPv6 is here to stay, not exclusive on your BSCI and CCNP exams, but in the actual concern as well. Learning it today module not exclusive assistance you in expiration your Cisco exams, but in activity IPv6 in the future.
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!
