- From: Roy T. Fielding <fielding@kiwi.ics.uci.edu>
- Date: Tue, 28 Apr 1998 12:53:34 -0700
- To: "David W. Morris" <dwm@xpasc.com>
- Cc: http-wg@cuckoo.hpl.hp.com
>I disagree ... there is a large difference between not being able to >resolve a name and not being able to connect to an IP address. >From the point of view of the proxy, yes. From the user's perspective, both indicate a failure of the proxy to map the identifier to a service. Whether that failure was due to a down IP interface or a bad DNS entry or a nonexistant DNS entry or a very slow DNS gateway may be useful for further diagnostics (and the proxy is certainly capable of recording those facts), but none of these can be used by the user agent to automatically handle the failure in a distinguishable manner, nor is it the user agent's responsibility to track the performance characteristics if the proxy's external network environment. Even if such a thing were desirable for a given proxy, the design principles of simplicity and separation of concerns suggest that it be transmitted separately from the main protocol stream (e.g., via SNMP monitoring). ....Roy
Received on Tuesday, 28 April 1998 13:04:42 UTC