nanog mailing list archives
Re: Big Temporary Networks
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Mon, 17 Sep 2012 08:42:22 +0900
Nick Hilliard wrote:
Thus, protocols heavily depending on broadcast/multicast, such as ND, will suffer.ok, you've trolled me enough to ask why ND is worse than ARP on a wavelan network - in your humble opinion?
Because, with IPv4: 1) broadcast/multicast from a STA attacked to an AP is actually unicast to the AP and reliably received by the AP (and relayed unreliably to other STAs). That is, a broadcast ARP request from the STA to the AP is reliably received by the AP. 2) the AP knows MAC and IP addresses of STAs 3) ARP and DHCP replies are usually unicast ARP and DHCP usually work. For an unusual case of ARP for other STAs, collisions do increase initial latencies, but as refreshes are attempted several times, there will be no latter latencies. OTOH, IPv6 requires many multicast received by STAs: RA and NS for DAD, for example. Worse, minimum intervals of ND messages are often very large, which means a lot of delay occurs when a message is lost. Masataka Ohta
Current thread:
- Re: Big Temporary Networks, (continued)
- Re: Big Temporary Networks Jay Ashworth (Sep 14)
- Re: Big Temporary Networks Chris Adams (Sep 14)
- Re: Big Temporary Networks Måns Nilsson (Sep 15)
- Re: Big Temporary Networks Jay Ashworth (Sep 15)
- Re: Big Temporary Networks William Herrin (Sep 15)
- Re: Big Temporary Networks Jay Ashworth (Sep 15)
- Re: Big Temporary Networks Masataka Ohta (Sep 15)
- Re: Big Temporary Networks Jay Ashworth (Sep 16)
- Re: Big Temporary Networks Masataka Ohta (Sep 16)
- Re: Big Temporary Networks Nick Hilliard (Sep 16)
- Re: Big Temporary Networks Masataka Ohta (Sep 16)
- Re: Big Temporary Networks Nick Hilliard (Sep 17)
- Re: Big Temporary Networks Masataka Ohta (Sep 17)
- Re: Big Temporary Networks William Herrin (Sep 17)
- Re: Big Temporary Networks Masataka Ohta (Sep 18)
- Re: Big Temporary Networks William Herrin (Sep 18)
- Re: Big Temporary Networks Nick Hilliard (Sep 18)
- Re: Big Temporary Networks William Herrin (Sep 18)
- Re: Big Temporary Networks Seth Mos (Sep 19)
- Re: Big Temporary Networks Masataka Ohta (Sep 19)
- Re: Big Temporary Networks Sean Harlow (Sep 19)