Date: Thu, 09 Aug 2001 05:22:47 +0900 From: Jun-ichiro itojun Hagino <itojun@iijlab.net> To: Mike Tancsa <mike@sentex.net> Cc: Jeroen Ruigrok/Asmodai <asmodai@wxs.nl>, freebsd-net@freebsd.org Subject: Re: gif MTU of 1280 ? Message-ID: <20010808202247.D20C77BB@starfruit.itojun.org> In-Reply-To: mike's message of Wed, 08 Aug 2001 15:51:49 -0400. <5.1.0.14.0.20010808155054.04d25380@marble.sentex.ca>
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>> as others noted, if you set gif MTU to 1500, then you will see a lot >> of fragmented packet exchanges (= poor performance). if you use >> IPv4 as the outer header, MTU <= 1480 avoids fragmentation and >> more performant. as 1280 <= 1480, we avoid fragmentation with the >> current default configuration. >If the Internal IPs are RFC 1918, will hinder PMTU ? Am I better off to >use real ones on the inside ? private/global address doesn't change the situation at all. itojun To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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