ed@vMX_R1# run show interfaces terse em2
Interface Admin Link Proto Local Remote
em2 up down
[edit]
ed@vMX_R1# run show interfaces em2 | match HARD
Interface flags: Hardware-Down SNMP-Traps
Current address: 0c:9e:24:d6:00:02, Hardware address: 0c:9e:24:d6:00:02
[edit]
ed@vMX_R1# set interfaces em2.0 family inet6
[edit]
ed@vMX_R1# commit
commit complete
[edit]
ed@vMX_R1# run show interfaces terse em2
Interface Admin Link Proto Local Remote
em2 up down
em2.0 up down inet6 fe80::e9e:24ff:fed6:2/64
[edit]
ed@vMX_R1#
Using SLAC scenario for configuring 64 bit Interface ID part of IP address
Subnet ID = 12:34:ab:fffe:fe:cd:ef:56 (inserting FFFE between first 24 bit Company ID and last 24 bit Manifacturer ID)
then add subnet ID part of Link local scope wich is FE80::/10
We then find : fe80::1234:abff:fecd:ef56
I think correct answer is A (the question is host's IPv6 EUI-64)
Ref : https://blog.marquis.co/ipv6-and-junos-stateless-address-autoconfiguration-slaac/
No because D just appends the MAC address to fe80::<mac>/64. The right answer is derived using the follow EUI-64 conversion process:
1. Identify the 24 bit company ID and manufacture ID.
MAC: 12-34-ab-cd-ef-56
Company ID (First 24 bits/First half of MAC): 12-34-ab
Manufacture ID (Last 24 bits/Last half of MAC): cd-ef-56
2. Rewrite/Concatenate the new 64 bit address as follows <company id>-ff-fe-<manufacture id>: 12-34-ab-ff-fe-cd-ef-56
3. Drop the dashes and group into 4 byte groups separated by a colon (xxxx:xxxx:xxxx:xxxx). You should get 4 groups: 64 bit Address: 1234:abff:fecd:ef56
4. Now new address into the following to generate the new IPv6 SLAAC address: fe80::<new 64 bit address>/64 -> fe80::1234:abff:fecd:ef56/64
upvoted 3 times
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