Date: Sat, 15 May 2004 17:22:02 -0500 From: "Shawn Mitchell" <shawnm@iodamedia.net> To: "FreeBSD current users" <current@freebsd.org> Subject: 5.2.1 em driver and vlan issue. Message-ID: <HJEELFHCPNPOPDIOMAKBKEKDEBAA.shawnm@iodamedia.net>
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I'm trying to get some stuff tested out, but I'm having a huge issue. em0 (no ip addy) (Intel PRO/1000) vlan0 -> em0 (10.0.0.1/24) vlan1 -> em0 (10.0.1.1/24) ..... vlan9 -> em0 (10.0.9.1/24) Everything has a MTU of 1500 (set by default) Now, the problem I'm having is the classic, it's 'dropping' the large packets. Sometimes if the packet is greater than 650 bytes, sometimes 750 bytes. I've tried setting em0's mtu to 9000 (jumbo packets, and yes, the switch supports them), I've tried setting the mtu lower for vlan0, but nothing seems to fix this issue. Any idea's on how I can test this further, or fix it? The throughput should be sitting at port speed for my test boxes sitting on two different vlan's, but I'm seeing speeds of around 200kbit/sec on a 100meg/sec port. testing between two boxes on the same vlan (so they don't route traffic to the FreeBSD box) shows just a few kbit/sec short of 100mbit/sec. This is starting to drive me nuts. -Shawn
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