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From: "Kurilov D.I." <kurilov@tscp.ru>
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Date: 12 Jan 2004 09:33:32 +0500
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Subject: vlan support
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How do you do!

I've got FreeBSD 5.1-RELEASE from ftp://ftp.FreeBSD.org

I have a small net with switch Cisco Catalyst 2950 and Cisco Router
2650. The purpose is to replace 2650 router.

I've include vlan support in kernel. Correspondingly, my /etc/rc.conf : 
ifconfig_rl0="inet 192.168.10.1 netmask 255.255.255.252"
cloned_interfaces="vlan0 vlan1 vlan2"
ifconfig_vlan0="inet xxx.xxx.xxx.xxx netmask 255.255.255.240 vlan 2
vlandev rl0"
ifconfig_vlan0_alias0="inet yyy.yyy.yyy.yyy netmask 255.255.255.248"
ifconfig_vlan0_alias1="inet zzz.zzz.zzz.zzz netmask 255.255.255.192"
ifconfig_vlan1="inet 192.168.253.2 netmask 255.255.255.252 vlan 3
vlandev rl0"
ifconfig_vlan2="inet 192.168.100.1 netmask 255.255.255.0 vlan 4 vlandev
rl0"

Catalyst settings were write because it works with cisco router.

When I'd reboot my FreeBSD machine I saw that my FreeBSD router didn't
forward packets between interfaces.
# tail -f /var/log/messages
Jan 12 06:41:16 router kernel: vlan1: discard oversize frame (ether type
800 flags 3 len 1514 > max 1510)

I have change my mty to 1514 but it didn't help.

How can I repair that?

With respect,
Dmitriy Kurilov.