Well the traceroute implementation we use around here limits how fast it sends out probes, to no more than one a second. From your comment I take it not everyone does this?
Rich > -----Original Message----- > From: Pekka Savola [mailto:[EMAIL PROTECTED]] > Sent: Monday, October 29, 2001 10:24 PM > To: Richard Draves > Cc: Lori Napoli; [EMAIL PROTECTED] > Subject: RE: ICMPv6 rate limiting factor > > > On Mon, 29 Oct 2001, Richard Draves wrote: > > The Microsoft implementation limits to two errors per > second, just for > > this reason. > > That is only good enough if you assume the tracerouter is > over 500ms away, > because traceroute by default sends out three probes.. > > I've commented on the new ICMP draft that this issue should > be taken into consideration, and apparently it will, as the > draft didn't progress at IETF51. > > B.t.w. Linux uses a token bucket mechanism here and is not affected. > > B.t.w.2. Cisco implementation is(/was) also broken, another > issue I mentioned here and on [EMAIL PROTECTED], they promised > they'd be working on it. > > > > -----Original Message----- > > > From: Lori Napoli [mailto:[EMAIL PROTECTED]] > > > Sent: Monday, October 29, 2001 6:59 PM > > > To: [EMAIL PROTECTED] > > > Subject: ICMPv6 rate limiting factor > > > > > > > > > RFC 2463 states that it is a MUST to limit the rate of ICMPv6 > > > error messages that are sent. Traceroute is a utility that > > > relies on ICMP error messages. One of the parameters for > > > traceroute is the number of probes > > > that are sent for each hopcount. RFC 2463 gives an example > > > of 1 second as > > > a conservative default if timer based rate limiting was > > > implemented. If > > > this is used, traceroute won't receive a reply for each > > > probe if multiple probes are sent for each hopcount since > > > some will be supressed due to the rate limiting factor. What > > > are other implementations doing in regard to ICMPv6 rate limits? > > > > > > Thanks > > > Lori > > > > > > > > > > -------------------------------------------------------------------- > > > IETF IPng Working Group Mailing List > > > IPng Home Page: > http://playground.sun.com/ipng > > > FTP archive: > ftp://playground.sun.com/pub/ipng > > > Direct all administrative requests to > [EMAIL PROTECTED] > > > > -------------------------------------------------------------------- > > > > > -------------------------------------------------------------------- > > IETF IPng Working Group Mailing List > > IPng Home Page: http://playground.sun.com/ipng > > FTP archive: ftp://playground.sun.com/pub/ipng > > Direct all administrative requests to [EMAIL PROTECTED] > > -------------------------------------------------------------------- > > > > -- > Pekka Savola "Tell me of difficulties surmounted, > Netcore Oy not those you stumble over and fall" > Systems. Networks. Security. -- Robert Jordan: A Crown of Swords > > > -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
