Jared Mauch <[email protected]> writes:
> On Aug 16, 2010, at 5:43 AM, Mark Smith wrote: > > It seems to me that arguing against redirects is actually arguing for > > having a common case, rather than an transient one, of nodes that don't > > have full onlink prefix knowledge. I think having all nodes attached to > > the link (i.e. both hosts and routers) being fully aware of all onlink > > prefixes is a much better idea. > Not really, it's about the role of a device in a network. > If there are multiple subnets within a single broadcast domain that > require redirects to tell the hosts about what is on-link, it's > much better to actually configure your host correctly (or have it > actively participate vs passively via redirects) so they have > knowledge of these additional subnets. The above is not the main reason for redirects. If you have 2 routers on the link, a host will choose one (at random) and forward traffic to it. If the host guesses wrong (for a particular destination), the router should send a redirect directing the host to use the other router instead (for that particular destination). The host then updates its cache and forwards subsequent traffic to proper router. Redirects are a key part of the Internet architecture. Always have been. Thomas -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
