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<TITLE>RE: MTU path discovery and IPSec </TITLE>
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<P><FONT SIZE=2>> On Wed, 03 Dec 2003 16:05:39 GMT, jgraun@comcast.net said:</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> > 1) I assume MTU path discovery has to been in enabled on </FONT>
<BR><FONT SIZE=2>> each router in the path in order for it work correctly?!</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> Actually, no. All that's required is that:</FONT>
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<P><FONT SIZE=2>You also need an OS that does not set the DF-bit on every packet it sends out. IIRC, out-of-the-box Solaris 8 is excellent at doing that. No matter how many icmp messages it gets, it happily ignores them by insisting on sending out frames of 1500 bytes with the DF-bit set. Makes trouble-shooting IPSec connections, uhm.... interesting.</FONT></P>
<P><FONT SIZE=2>Cheers,</FONT>
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<P><FONT SIZE=2>Arjan H</FONT>
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