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A comment on Hello IPv6: a minimal tutorial for IPv4 users. Parent comment

Re:Hello IPv6: a minimal tutorial for IPv4 users by ninkendo on Saturday January 27, 2024 @07:40PM (#39161362)
> I can do a rough inventory of my IPv4 home network (120 devices) by looking at hostnames for DHCPv4 leases, no such thing exists for IPv6.

I can do the same thing with mDNS, there’s no need to run a stateful DHCP server.

    avahi-browse -at
Done.
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Re:Hello IPv6: a minimal tutorial for IPv4 users by cyberax on Saturday January 27, 2024 @10:30PM (#39162281)
Sigh.

No. mDNS is not mandatory (e.g. my TrippLite UPS management card doesn't support it), and it requires active device participation. If a device is busy or slow to respond, you'll miss it.

DHCPv4 leases are authoritative, and they don't require device participation for discovery.

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Re:Hello IPv6: a minimal tutorial for IPv4 users by ninkendo on Sunday January 28, 2024 @07:54AM (#39165232)
Sending hostnames isn’t required for DHCPv4 either. If we want to talk about ill-behaved clients, I don’t see why you can count this as a negative for mDNS but not stateful DHCP.
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Re:Hello IPv6: a minimal tutorial for IPv4 users by cyberax on Sunday January 28, 2024 @08:26AM (#39165502)
In practice, hostnames are sent by most clients, because it requires pretty much zero effort from the device. mDNS requires a complicated service that needs to be always on.
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