- The document provides guidance on assigning IPv6 addresses from a /32 allocation to a small colocation and broadband provider network with 3 POPs. - It recommends assigning a /48 prefix per POP, using 4-bit boundaries for assignments (e.g. /56, /60), and considering ease of aggregation and most important devices/connections. - An addressing plan is outlined assigning infrastructure addresses and customer prefixes from the provider's 2001:DB8::/32 allocation.

1. Exercise description:
You are a small colocation and broadband provider and you are an LIR. You received a /32 allocation: 2001:DB8::/32
You currently have 3000 DSL customers and 1000 colocation customers. 500 colocation customers are connected
on each switch. Also, you provide e-mail, www, proxy, usenet, VoIP and DNS services to them. There is no significant
growth expected in the number of customers or expansion planned for your network.
Step 1: Assign the /48 per POP
Step 2: Decide the size of the assignments per device
Step 3: Decide the size of the customer assignments
Step 4: Fill in the addressing plan accordingly
POP3
Some things to consider: DMZ
• The most important goal with IPv6 is aggregation.
• You can assign a /48 per POP without sending a request to the RIPE NCC.
• For your most important connections/equipment, use the easiest to remember addresses. (loopbacks etc.)
• For administrative ease (DNS and your mind), it is recommended you assign on 4-bit boundary:
guest
Prefix Number of /64 subnets vlan
cr1.office
/48 65.536 NOC
/52 4096 vlan
/56 256 server
vlan
/60 16
/64 1
POP1 POP2
mail
sw 1 colo 1
www
cr1.pop1 cr1.pop2
proxy
customer
vlans
usenet
voip cr2.pop1 cr2.pop2
sw 2 colo 2
DNS
DSL
customers
AR2

2. Your prefix: 2001:DB8::/32
POP1
Infrastructure
loopback addresses
mail server vlan
www server vlan
proxy server vlan
usenet server vlan
VoIP server vlan
DNS server vlan
cr1.pop1
cr2.pop1
sw1
sw2
POP2
cr1.pop2
cr2.pop2
colo1
colo2
POP3
cr1.office
DMZ
office lan
guest vlan
NOC vlan
server vlan
Customer Assignments DSL Customers (3000)
Colocation Customers (1000)