CCNA--CCNP-Coaching--IPv6-Addressing
As a CCNA/CCNP candidate you are envisioned to realize IPv6
Throughout your job as a Cisco network engineer you will have to offer knowing IPv6 address composition.
For your CCNA and CCNP studies you have to at some point confront and recognize IPv6. At ccnp training london can see fairly complicated in comparison to IPv4 that we are all employed to, in actual truth IPv6 is quite a just addressing protocol once you get earlier the preliminary shock. In this report we are heading to have a search at Neighbour discovery protocol for layer two mapping.
When an IPv6 host or router demands to ship a packet to some other host on the identical network it will very first of all search into it's personal neighborhood neighbour database to locate if it has an IPv6 to MAC mapping, if it finds the proper mapping the host will use it, if there is no mapping the host will need to resolve the known layer 3 IPv6 deal with to a at present unknown Layer 2 MAC tackle and to do this the host utilizes the Neighbor Discovery Protocol or NDP to discover the MAC address dynamically.
The Sending host will use a multicast concept named a Neighbor Solicitation (NS) icmp concept to inquire the receiving host for it's MAC deal with, the obtaining host will reply with a Neighbor Advertisement (NA) icmp information unicast in return with the asked for MAC handle.
How IPv6 achieves this is all in the development of the Neighbor Solicitation message which makes use of a unique IPv6 vacation spot deal with called a "Solicited Node Multicast", this solicited Node Multicast at any presented second represented all of the IPv6 hosts on the website link, the last 24 bits of the Solicited Node Tackle are the last 24 bits of the IPv6 tackle of the gadget that a host is requesting the MAC from.
The IPv6 multicast destination tackle is FF02::one:FF:/104 the last 24 bits are produced up of the last 24 bits of the IPv6 tackle to which the concept is getting despatched to. For case in point if a host needed to find out the MAC handle of an IPv6 host tackled as 2222:3333:4444:5555:6666:AAAA:BBBB:CCCC:DDDD/64 then the solicited Node Address will seem like the pursuing FF02::1:FF:CC:DDDD/104
When a sending hosts wants to get the MAC tackle from the IPv6 host of 2222:3333:4444:5555:6666:AAAA:BBBB:CCCC:DDDD/64 it will just take the last 24 bits of the recognized IPv6 handle and spot them into the remaining 24 bits of the Solicited Node Handle and because all IPv6 hosts listen to their personal Solicited Node addresses, when they listen to their deal with they will reply with the MAC address.
