convert mac address to ipv6 unique local unicast

CONVERT MAC ADDRESS TO IPV6 UNIQUE LOCAL UNICAST 64 BIT
CONVERT MAC ADDRESS TO IPV6 UNIQUE LOCAL UNICAST 64 BITS

Here is how you configure basic IPv6 addressing on a Cisco IOS device. Here is an example of deriving Solicited Node muticast address from Interface ID. Neighbour Solicitation (NS) messages use Solicited Node Multicast address having the format of FF02::1:FF format. Here are few well-known IPv6 Multicast MAC address. IPv6 Multicast addresses are having following format. You can verify this “show ipv6 interface brief command” CR01#sh ipv6 interface brief | ex un In this example Link Local IPv6 address should be FE80::5 675:d0 ff: febd:90c0. Add “fffe” to the middle of the MAC address.( in between “d0” & “bd” in my case) So this will be written as (0101 01 10) & therefore interface ID should start with 56.Ģ. Invert 7th bit (0101 01 00) of the MAC address (start with 5475 in my example). GigabitEthernet1/2 is up, line protocol is up (connected) Once you configure IPv6 on this interface it will automatically assign IPv6 Link Local address based on that MAC address. Given interface is having following MAC address.

Note that 7th bit get inverted as well in this conversion process.

CONVERT MAC ADDRESS TO IPV6 UNIQUE LOCAL UNICAST 64 BIT

In case of expanding 48 bit MAC to 64 bit interface ID “ FFFE” will be instert into the middle of 48 bit MAC address to make it 64bit. Auto Configured from a EUI-64 or expanded from a 48 bit MAC address IPv6 Address for a given interface may be assigned in different ways.ġ. Here are the different type of Address requirement for a given interface. Here is the format of Link Local IPv6 address. By default Link local IPv6 address self assigned based on the MAC address of the IPv6 enabled interface. Not like IPv4, given interface can have multiple IPv6 addresses on it. There are different type of IPv6 addresses assigned by IANA. Also you can ignore leading zeros of a given block of 4 hex digits. You can replace all highlighted blocks of Zero with :: which simplify this to 2001:0308:607c:003e::0002. But for a given address :: can appear on once.

IPv6 uses CIDR representation & also you can abbreviate using :: for continuous blocks of Zeros. These are not case sensitive & you can use either uppercase or lowercase hex characters to represent IPv6 address. Usually written as 32 hex with grouping of four by a colon (:).

CONVERT MAC ADDRESS TO IPV6 UNIQUE LOCAL UNICAST 64 BITS

Usually last 64 bits allocated for host & first 64 bits allocated for Network. IPv6 addressing has the following format. In technical terms, here is the difference between IPv4 & IPv6 header. What is the difference between IPv4 & IPv6 ? In simple terms IPv6 address is 128 bits long (compare to 32 bits IPv4) which allows to create 2^128 address which is more than sufficient to meet the demand of a foreseeable future.

Convert mac address to ipv6 unique local unicast