Hello, Oleksandr Listopad! On Mon, Jun 23, 2003 at 12:07:29PM +0300 laa@laa.zp.ua wrote about "[uanog] Re: vlan q :)":
Hello, Dmitry Tokar!
On Mon, Jun 23, 2003 at 11:37:53AM +0300 dim@express.net.ua wrote about "[uanog] Re: vlan q :)":
Если мне не изменяет память rtl8029 не умеет dot1q, потому странно что ифконфиг вообще дал такое сделать.
man vlan:
... Selecting the Right Network Interface Card to Run VLANs Through By now, the only NICs that have both hardware support and proper driver hooks for the 802.1Q VLAN technology in FreeBSD are bge(4), em(4), gx(4), nge(4), ti(4), and txp(4).
The rest of the ethernet NICs supported by FreeBSD can run VLANs using software emulation in the vlan driver. However, most of them lack the capability of transmitting and/or receiving oversized frames. Using such a NIC as a parent interface implies a reduced MTU on the corresponding vlan interfaces. In the modern Internet, this is likely to cause tcp(4) connectivity problems due to massive, inadequate icmp(4) filtering that breaks the Path MTU Discovery mechanism. ... ага, кроме того есть еще недокументированные девайсы, типа rl, ну и (оттуда же) Note: Unless marked as having native support for vlan, the above drivers don't inform the vlan driver about their long frame handling capability. Just increase the MTU of a vlan interface if it appears to be lower than 1500 bytes after attaching to a parent known to support long frames.
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