NTC/362: Fundamentals of Networking
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NTC/362: Fundamentals of Networking
Q: Router R1’s Fa0/0 interface was up and working, and was then configured as follows:
R1(config)# interface fa0/0 R1(config-if)# mac-address 0011.2233.4455 R1(config-if)# ipv6 address 2001:1234::1/64
A:2001:1234::1 , FE80::211:22FF:FE33:4455
Explanation:The global unicast address of 2001:1234::1 would be exactly as configured. The link-local address would be FE80::211:22FF:FE33:4455, using the modified EUI-64 format, with the 7th bit of the MAC address inverted.
Regarding the other answers, FE80::11:22FF:FE33:4455 doesn’t have the 7th bit from the MAC address inverted. The other global address of 2001:1234::211:22FF:FE33:4455 uses the EUI 64 format, and in the output of the configuration, we specified the whole IP without the modified EUI-64 option for the host ID. Two of the addresses beginning with FF are multicast groups that were joined (solicited node multicast groups, based on the two IP addresses in use by the router).
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