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        RFC 1435:

        Title:      IESG Advice from Experience with Path MTU
                    Discovery
        Author:     S. Knowles
        Mailbox:    stev@ftp.com
        Pages:      2
        Characters: 2,708
        Updates/Obsoletes:  none


In the course of reviewing the MTU Discovery protocol for possible
elevation to Draft Standard, a specific operational problem was
uncovered.  The problem results from the optional suppression of
ICMP messages implemented in some routers.  This memo outlines a
modification to this practice to allow the correct functioning of
MTU Discovery.

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not specify an Internet standard.  Distribution of this memo is
unlimited.

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Joyce K. Reynolds
USC/Information Sciences Institute