nanog mailing list archives
Re: IPv6 RA vs DHCPv6 - The chosen one?
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Thu, 29 Dec 2011 10:15:50 +0900
TJ wrote:
However, assuming you change the cells every 100m in average and you are moving at 100km/h, you must change the cells every 3.6 seconds in average, which means you must be able to change the cells frequently, which means each cell change take a lot less than 3.6 seconds.
To me, that sounds like an argument in favor of SLAAC. SLAAC is noticeably faster in my experience than DHCP (v4 or v6).
RA initiated DHCPv6 is slower than RA, of course. Note that RA initiated DHCPv6 is even required to suffer from DAD delay.
Also, RAs can be sent in the ms range
Only when you are using mobile IPv6 and there still remains delay caused by DAD.
Also: Isn't 100m an arbitrarily tight range for a cel tower?
Cell size must shrink as bandwidth requirements of mobile devices increase.
And for cellular, isn't the real churn happening more at the Layer2 side ... no L3/IPv6/IPv4 interaction?
Because of large amount of traffic caused by smart phones, mobile providers, at least those in Japan, are trying to bypass traffic from 3G to WLAN/Internet with IPv4 L3.
Boot time, or anytime a change in network attachment point is detected ... is that not sufficient?
It is wrong to assume intervals between changes 6 seconds. In general, ND is wrong to specify link specific timings assuming infrequent changes. Masataka Ohta
Current thread:
- Re: IPv6 RA vs DHCPv6 - The chosen one?, (continued)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Valdis . Kletnieks (Dec 27)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Ray Soucy (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Ray Soucy (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Ray Soucy (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Ray Soucy (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? TJ (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Cameron Byrne (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? TJ (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Alan Clegg (Dec 29)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Leo Bicknell (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Masataka Ohta (Dec 28)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Mohacsi Janos (Dec 23)
- Re: IPv6 RA vs DHCPv6 - The chosen one? William Herrin (Dec 23)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Owen DeLong (Dec 20)
- Re: IPv6 RA vs DHCPv6 - The chosen one? Tore Anderson (Dec 20)