Henrik Nordstrom wrote:
> I have a idea for a very simple extension, based on current ICP
> implementations:
>
> If the host is unknown (or expired) in local NetDB, then send ICMP ECHO
> to the origin site and ICP SRC_RTT to all peers supporting
> ICP_FLAG_SRC_RTT. Cache ICP rtt replies as netdb data from the peer, and
> ICP rtt as NetDB rtt for the peer.
Sorry for being a bit unclear above. The last sentence should read:
Cache ICP SRC_RTT rtt/hops as netdb data from the peer, and ICP packet
rtt as NetDB rtt for the peer.
> This distributes NetDB data on demand, allows each cache maintainer to
> decide which freshness rules that should be used and gives peers a
> realistic rtt penalty. And as more aggressive caching can be used
> without loosing information on new hosts it may show a lower bandwidth
> usage even for high load caches (for low load caches it certainly will).
>
> ICP may be replaced with a new protocol for pure NetDB exchanges if we
> want to eleminate ICP all together. The use of ICP above involves only
> NetDB queries and does not really use ICP in it's original sense. Any
> extra information recevied by using ICP os a bonus, but not needed from
> a NetDB point of view.
/Henrik
Received on Tue Jul 29 2003 - 13:15:55 MDT
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