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Webcast-Catalyst9k
New Member

IPv6 Campus Deployment experiences?

Hi all,

Since the understanding of IPv6 itself is not a big problem anymore, I am on the search of documents how to deploy it on campus Networks.

Example: I have a building with 10 routed IPv4 /24 Subnets and want to run dual-stacked. Are there the same rules for the size of broadcast domains like v4?

Do I just subnet the same blocks of clients in v6 and route them?

I cannot find specific reading about this. Any recommendations? Best Practices?

2 REPLIES
Bronze

Re: IPv6 Campus Deployment experiences?

With the initial release of IPv4 addresses, it was suggested to just make the subnets as large as you desired - this was back in the day you see.

Now since IPv6 has such an enormous address space, we are being told to follow the same method again.

With v6, docs suggest to make every link (lan, wan, point-to-point etc.) /64.

I did not follow this method, I followed my current v4 setup.

Also in my v4/6 lab, I used the following setup.

LAN1

172.16.1.0 /24

172:16:1::0 /120

LAN2

172.16.2.0 /24

172:16:2::0 /120

Point-to-point links

172.31.1.0 /31

172:31:1::0 /127

Is this the right way ???

I am sure there are MANY ways - LOL

good Luck

Frank

New Member

Re: IPv6 Campus Deployment experiences?

You will be forced to use /64 for working autoconfiguration. And yes, smaller than /64 makes no sense the IPv6-Way. But for single broadcast-domain, there must be a limit for the number of hosts...

https://www.sixxs.net/wiki/Subnet

Also according to sixxs You can configure Your router this way:

ipv6 unicast-routing

interface Ethernet0/0

ipv6 address [IPv6 Prefix]/64

ipv6 enable

ipv6 nd ra-interval 60

ipv6 nd ra-lifetime 180

ipv6 nd prefix-advertisement [IPv6 Prefix]/64 360 60 autoconfig

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