Realistic number of hosts for a /64 subnet?
dougb at dougbarton.email
Fri May 10 06:27:22 CEST 2019
It's been a while since I was configuring subnets, and last time I did
the guidance was always no more than 1,000 hosts per subnet/vlan. A lot
of that was IPv4 thinking regarding broadcast domains, but generally
speaking we kept to it for dual stacked networks, equating an IPv4 /22
with an IPv6 /64. (This was commonly in office environments where we
used a subnet per floor to accommodate all of the desktops, printers,
phones, tablets, etc.)
Is this still how people roll nowadays? Have switches and/or other
network gear advanced to the point where subnets larger than 1k hosts
are workable? In IPv4 or IPv6? I've done quite a bit of web searching,
and can't find anything newer than 2014 that has any kind of intelligent
discussion of this topic.
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