[Zeinab Mohamed]

🚧Question on Hierarchical Asymmetry – Worked Example 🚧

Case Overview:

I am working through an IPv6 addressing plan for an organization with the following structure:

Level 1 (Regional): 25 Cities. Borrowing 8 bits to accommodate this (2^8 = 256 max), resulting in a /36 per city.

Level 2 (Local): 7 Campuses per city. Borrowing 4 bits (2^4 = 16 max), resulting in a /40 per campus.

End Level: 5 Departments per campus, supporting ~5,000 devices using /64 subnets.

Network Prefix from AFRINIC = /32
========================================================

The Crucial Question:

In this architecture, Level 1 uses a larger “bit-slice” (x=8) than Level 2 (y=4). Is it a best practice for a higher level in the hierarchy to have a smaller “bits borrowed” value than a lower level, or should the bit-allocation ideally follow a descending or equal pattern?

Does having a larger bit-allocation at the top level (Cities) create unnecessary sparse density, or is it preferred to allow for more significant regional growth compared to local campus growth?

Another Question about End Level, I initially choose /60 to fit the requirement then I thought /64 will be a bit better and more align with the recommended guideline we have during the course? Can you confirm this point too?

Looking forward for your replies Fellows

[Zeinab Mohamed]

🚀 Milestone Reached: Mastering IPv6 on Cisco IOS!

I just completed the module on IPv6 configuration for Cisco IOS, and the walkthrough was incredibly insightful!

The absolute “Jam” of the lesson for me was the hands-on configuration of Anycast addresses. Seeing how we can assign the exact same Unicast address to multiple interfaces to allow the network to automatically route traffic to the “nearest” node is a game-changer for service redundancy.

Key Anycast Insight:

In Cisco IOS, it’s as simple as adding the anycast keyword at the end of your address assignment:

Device(config-if)# ipv6 address 2001:db8:acad::1/64 anycast

This has massive implications for my work in low-latency education networks, specifically for localized DNS or Content Delivery. Other highlights included:

Enabling ipv6 unicast-routing as the mandatory foundation.

The efficiency of EUI-64 interface IDs.

Rapid verification using show ipv6 interface brief.

This has given me a great foundation for my upcoming labs in GNS3. Onwards to the next module!

[Zeinab Mohamed]

⚠️ Content Access Issue: Private Video in Windows Configuration Module

To the AFRINIC Academy Support Team,

I am reporting a technical issue within the current module regarding “Enabling Privacy Addresses on Windows.”

The instructional video intended to demonstrate this configuration is currently set to “Private” on YouTube, making the content inaccessible. As I am working through the practical labs for IPv6 host configuration, this creates a significant gap in the learning materials.

Could the team please check the video permissions or provide an alternative resource so we can complete the Windows configuration steps?

• This reply was modified 1 mois, 3 semaines ago by  Zeinab Mohamed.