Date: Mon, 16 Jul 2001 12:16:46 -0700 (PDT) From: danny mitzel <danny_j_mitzel@yahoo.com> To: Peter Pentchev <roam@orbitel.bg>, net@FreeBSD.ORG Subject: Re: ICMP source quench - deprecated? Message-ID: <20010716191646.9105.qmail@web10602.mail.yahoo.com> In-Reply-To: <20010716152638.B52566@ringworld.oblivion.bg>
next in thread | previous in thread | raw e-mail | index | archive | help
RFC1812 Requirements for IP Version 4 Routers
4.3.3.3 Source Quench
A router SHOULD NOT originate ICMP Source Quench
messages. As
specified in Section [4.3.2], a router that does
originate Source
Quench messages MUST be able to limit the rate at
which they are
generated.
DISCUSSION
Research seems to suggest that Source Quench
consumes network
bandwidth but is an ineffective (and unfair)
antidote to
congestion. See, for example, [INTERNET:9] and
[INTERNET:10].
Section [5.3.6] discusses the current thinking
on how routers
ought to deal with overload and network
congestion.
A router MAY ignore any ICMP Source Quench messages
it receives.
DISCUSSION
A router itself may receive a Source Quench as
the result of
originating a packet sent to another router or
host. Such
datagrams might be, e.g., an EGP update sent to
another router, or
a telnet stream sent to a host. A mechanism has
been proposed
([INTERNET:11], [INTERNET:12]) to make the IP
layer respond
directly to Source Quench by controlling the
rate at which packets
are sent, however, this proposal is currently
experimental and not
currently recommended.
__________________________________________________
Do You Yahoo!?
Get personalized email addresses from Yahoo! Mail
http://personal.mail.yahoo.com/
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20010716191646.9105.qmail>