On Fri, 26 Aug 2005, Brian Henning wrote:
Joseph Mack NA3T wrote:
A common problem. Unfortunately the RFCs say that ping is not to be used
(at least continuously) for connectivity checking.
Which RFC says that?
the statement is from
http://www.freesoft.org/CIE/RFC/1122/56.htm
which references RFC 816 (which I haven't read).
Statement 2 in section 3.3.1.4 says
Active probes such as "pinging" (i.e., using an ICMP
Echo Request/Reply exchange) are expensive and scale poorly. In
particular, hosts MUST NOT actively check the status of a
first-hop gateway by simply pinging the gateway continuously.
I got to the freesoft site starting at a link that tells you
how to route through two ISPs, alternately known as the
"dead gateway problem".
http://www.ssi.bg/~ja/nano.txt
http://www.ssi.bg/~ja/dgd-usage.txt
http://www.ssi.bg/~ja/mpath/
but I see (just now) that these don't refer to RFCs.
Joe
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Joseph Mack NA3T EME(B,D), FM05lw North Carolina
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