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only one query related to ipv6

Discussion in 'Networks' started by kobem, Dec 24, 2007.

  1. kobem

    kobem Megabyte Poster

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    first of all i figured path MTU and link MTU diversity out.

    second here is other query

    i have read link-local ,site local , multicast and their address structures...
    therefore link local starts with 1111111010 ....... site-local 1111111011
    and multicast starts with 1111111111 ..........

    -----------**********however in some documents as examples it shows ip address
    like aaaa : bbbb : cccc : dddd : eeee : ffff : gggg : hhhh ( 8 parts, each 16 bits) ******** ----------

    --------****"what is the type" for the ip address i showed "last" ? (unicast , multicast....)
    BECAUSE LAST ONE IS NOT LIKE THE OTHERS AS I WROTE DOWN!*****-----------
     
    Certifications: CCNA
  2. hbroomhall

    hbroomhall Petabyte Poster Gold Member

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    I'm not sure I understand what the question is.

    Have a look here for a pretty good description of IPv6 addressing.

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+
  3. Donmac

    Donmac Bit Poster

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    There are 3 types of IPv6 they are multicast, anycast and unicast.

    Multicast
    The packet is delivered to all the hosts.
    Hex = FF00
    Binary Prefix = 1111 1111 0000 0000


    Anycast
    The packet is delivered to the nearest device.


    Global Unicast
    The identifier of a single host.
    Hex = 2000
    Binary Prefix = 0010 0000 0000 0000

    Site Local Unicast
    Hex = FEC0
    Binary Prefix = 1111 1110 1100 0000
    (Think 10.0.x.x 172.16.x.x 192.168.x.x local network)

    Local Link Unicast
    Hex = FE80 + Modified form of your MAC address (See RFC 3927) 11-22-33-44-55-66 split in half and add FF-EE in the middle result is = 11-22-33-FF-FE-44-55-66
    Binary Prefix = 1111 1110 1000 0000
    (Think 169.254.x.x APIPA)

    The Hex above just sits at the front of a full IPv6 address so...

    FEC0:bbbb:cccc:dddd:eeee:ffff:1111:2222 = Site local Unicast

    FF00:0000:0000:0000:0000:0000:0000:1000 = Multicast

    Hope that helps

    Donmac

    PS I know I've left in all the zero's that can be remove.
    PPS I'm no expert so if anyone can see any errors please left me know.
     
    Certifications: a few
    WIP: CCDA, CCNP, Ex2k7, Win2k8
  4. kobem

    kobem Megabyte Poster

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    i know what multicast anycast and unicast is ...

    the thing i tried to tell is

    link local starts with 1111111010 .
    site-local 1111111011
    multicast starts with 1111111111

    BUT

    for example

    2001 : 0000 : 0000 : 0000 : 0000 : bd3e : 2a1b : 0000 IS NOT LIKE link-local , site local or multicast
    what is the type for this?
     
    Certifications: CCNA
  5. hbroomhall

    hbroomhall Petabyte Poster Gold Member

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    It is a Global Unicast, as mentioned above, and also in the link I gave, which I presume you haven't read. The only thing not quite right with the above comment on it is that the prefix is 001 (binary), i.e. just 3 bits.

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+

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