IPv6 Icky EUI-64 Drill 1 – Answers

certskills
By certskills April 1, 2017 09:50

Short and icky sweet: this post lists answers for the icky EUI-64 drill 1 for #ICND2 and #CCNA. The problems require you to find the IPv6 address a host or router would use, given a prefix, MAC address, and assuming they use stateless auto-configuration. This post lists the answers.

Related links:

The Answers

Table 1 lists the original problems. Table 2 then lists the unicast IPv6 addresses as calculated with EUI-64, before abbreviation, with table 3 listing the same addresses in abbreviated form as requested. Table 4 then lists the solicited node multicast address just for fun. Also, for a quick review, note that the rules for creating the second half of the unicast address using SLAAC is as follows: split the MAC, insert FFFE, and invert the 7th bit. Figure 1 summarizes the process.

Figure 1: EUI-64 Rules Used by SLAAC

Table 1: Original Problems

Table 2: Unabbreviated Unicast Addresses Found with SLAAC

Table 3: Abbreviated Unicast Addresses Found with SLAAC

Unabbreviated Unicast IPv6 Addresses
1 2001:DB8:9283:102:20C:12FF:FE34:5678
2 3000:D0D0:D0D:BEEF:103:3FF:FE03:3030
3 2001:DB8::E00:BEFF:FEEF:CAFE
4 3100:202:1010:AA:213:BFF:FE0B:B0B0
5

2001:0DB8::2200:98FF:FE76:5432

 

Table 4: Solicited Node Multicast Addresses

 

 

IPv6 Icky EUI-64 Drill 1
IPv6 Shrinker 1
certskills
By certskills April 1, 2017 09:50
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3 Comments

  1. keith February 3, 11:23

    the problem was to write shortest abreviated ipv6 address. answer shows unabreviated version of addresses.

    2001:db8:9283:102:20c:12ff:fe34:5678
    3000:d0d0:d0d:beef:103:3ff:fe03:3030
    2001:db8::f00:beff:feef:cafe
    3100:202:1010:aa:213:bff:fe0b:b0b0
    2001:db8::2200:98fe:ef76:5432

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  2. Jack Mac February 10, 16:02

    We can also take it to the next step and “shrink” the address to what the router will display:

    1 — 2001:DB8:9283:102:20C:12FF:FE34:5678

    2 — 3000:D0D0:D0D:BEEF:103:3FF:FE03:3030

    3 — 2001:DB8::E00:BEFF:FEEF:CAFE

    4 — 3100:202:1010:AA:213:BFF:FE0B:B0B0

    5 — 2001:DB8::2200:98FF:FE76:5432

    Reply to this comment
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