[1732] in Commercialization & Privatization of the Internet
RE: An interesting question from can.canet.d
daemon@ATHENA.MIT.EDU (JQ Johnson)
Mon Dec 16 09:47:48 1991
To: comint@psi.com
From: jqj@phloem.uoregon.edu (JQ Johnson)
Date: 16 Dec 91 15:47:39 GMT
Jeff suggests ICMP error 13 as a feedback mechanism to respond to
policy-based routing restrictions.
It should be noted that using current technology the administrative
prohibitions on packet forwarding are generally done by limiting
routing table updates. It is not at all clear how to map such policy
based routing to an ICMP "administratively prohibited" error message.
For example, policy based routing might be implemented by failure to
*generate* IGP routes to a prohibited net, in which case the router
that has the filters installed will never receive packets for the
filtered network number, and would never have a chance to generate
an ICMP message.
I do not believe that the Internet currently possesses the technology
to implement policy based routing. If I am correct, then all current
attempts to limit traffic should be seen as either (1) attempts to
drive the production of new technology, or (2) attempts to degrade
service on the Internet.
JQ Johnson
Director of Network Services Internet: jqj@oregon.uoregon.edu
University of Oregon voice: (503) 346-1746
250E Computing Center fax: (503) 346-4397
Eugene, OR 97403-1212
