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Seb Rupik Fri, 10/31/2014 - 05:54
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Hi there,

IPv6 point to point links should always be /127, equivalent to IPv4 /31 .

Your two addresses will still use an entire /64, but will be masked as a /127 :

 

2001:2206:72fe::/64

       2001:2206:72fe::/127

       2001:2206:72fe::1/127

2001:2206:72fe:0001::/64

       2001:2206:72fe:0001::/127

       2001:2206:72fe:0001::1/127

..etc

 

cheers,

Seb.

Timothy Martin Thu, 11/06/2014 - 14:42
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There has been some guidance that says to reserve a /64 and configure the /127. That works well if you have “gobs” of space, like a /40 to work from.

The other school of thought is to configure all of your p2p links (/127) out of a single /64. Works for deployments that have a more limited amount of space, like a /48. Yes, that seems odd to say "limited"..

/128 with the same guidance. Do not use all 0’s or all 1’s in the host id

When allocating /127’s Make sure to start with xx:2 & xx:3

 

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