4 ms·
The author of dhcpcd (Roy Marples) also weighs in the discussion, saying that the former matches the same speed as long as ARP checking is disabled. So really,
by vezzy-fnord 12y ago
The author of dhcpcd (Roy Marples) also weighs in the discussion, saying that the former matches the same speed as long as ARP checking is disabled.
So really, it seems to me that the only reason networkd's DHCP is fast is because it's bare bones (and also skips a few sections of RFC 1531, according to Jayson Vantuyl... which doesn't sound good). Only dealing with lease negotiation, if Gundersen's statement near the end is still true.
- pothibo 12y agoIIRC, Apple also does something similar (skipping a few sections of the standard) to acquire a lease faster. That's why Macs connect faster to the network. I'm not an expert on the implementation of mac/windows/linux so maybe someone who knows can chip in.
- dingaling 12y agoUpon reconnectionn to the network the Apple OSs immediately resume using their previous lease address on the network, whilst initiating DHCP in the background. Works OK in small domestic networks but can cause some issues in big uni and corporate nets with frequent address churn.
- sciurus 12y agoSee https://news.ycombinator.com/item?id=2755461 https://news.ycombinator.com/item?id=2755461
- digi_owl 12y agoDidn't they do something similar on iPhone, only to discover that it was a security risk because the damn thing would reveal to anyone within broadcast range what networks you frequented?