Re: WLAN (was Re: IPv6 Host Configuration of Recursive DNS Server)

[Masataka Ohta <mohta at necom830.hpcl.titech.ac.jp>]

Christian Huitema;

> The reliance of ND on multicast is indeed questionable. Some networks
> support multicast poorly. As Masataka points out in his message,
> multicast does not play well with CSMA-CA networks, where transmission
> reliability relies on frame-level ACK. We could also mention the growing
> use of directive antennas or phased arrays antennas, which improve
> unicast transmission but don't apply to multicast. I would expect most
> wireless networks to be "somewhat multicast capable", but the multicast
> operation will not be reliable.

As base stations with sector or active antennas are expected to
know the locations of mobile hosts and transmit to all the
related sectors or undirectionaly, I think lack of ACK is the
only problem.
 
> The only standard solution so far is to treat these networks as NBMA,

The irony is that radio network is *THE* broadcast network.

PS

I'm not a member of ipv6 ML. That is, CC to me, if you want your mail
read by me.


--------------------------------------------------------------------
IETF IPv6 working group mailing list
ipv6 at ietf.org
Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6
--------------------------------------------------------------------