Date: Tue, 20 Jan 2004 22:07:24 +0000 From: Karl Pielorz <kpielorz@tdx.co.uk> To: freebsd-questions@freebsd.org Subject: FreeBSD tunnels / performance et'al (gif/tun etc.) Message-ID: <100014500.1074636444@rainbow>
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Hi All, I've just setup a FreeBSD tunnel (we've tried both gif and tun [via nos-tun]) now between two fairly large networks of machines... We've routed multiple class C networks over the tunnel - only to find the performance is, basically abysmal :( If I do a transfer from the machines 'wan' facing addresses directly, it works fine [we get about 230Kbytes a sec, on a 2mbit link between the hosts] - if I do a transfer from machine to machine via the tunnel endpoint IP's - we get about 140-160Kbytes a second... But 'general' traffic going across the link gets really lousy rates, and seems very 'staccato' (e.g. a few hundred bytes per second to a host). We've been careful re. MTU sizes by deploying tcpmssd where needed (e.g. for gif) Has anyone got any experience of routing large networks of traffic via tunnels under FreeBSD? As a comparison a linksys vpn box did the same thing for a single VPN and got nearly 200k with one host, and degraded 'fairly' with others online [but unfortunately doesn't have the support for multiple networks over the VPN etc. that we need]. Any help, info, or experience greatly appreciated... -Karl
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