Hello!
On Wed, 12 Jul 2006, Sten Daniel S?rsdal wrote:
In RELENG_4, RealTek 8129/8139 driver rl(4) doesn't claim VLAN support
(when I assign vlandev rl0, my vlan device initially gets mtu 1496). In
modern (e.g. RELENG_6) systems if_rl claims native VLAN support. I've
tried setting 'ifconfig vlan0 mtu 1500' for rl-based vlan device, and
resulting interface Just Works (TM) (1500-byte packets trasmit and receive
correctly via such a vlan). So is it safe to use vlan with 'vlandev rl0'
and 'mtu 1500' in RELENG_4? Has anyone observed any ill-effects in such
a configuration? Would it be simple enough for if_rl in RELENG_4 to
just announce native VLAN support to the system?
Sincerely, Dmitry
Not necessarily. I would assume, without looking, that you would also
need to enable oversized frame support.
I'm curious whether you've missed the following:
I've
tried setting 'ifconfig vlan0 mtu 1500' for rl-based vlan device, and
resulting interface Just Works (TM).
So the required support seems to be already enabled (at least for my
particular NIC). It isn't question for me whether _my_ NIC works in this mode
- it definitely does. My question is whether _any_ rl(4)-supported card will
behave in the same way ( = can I _rely_ on rl(4) in RELENG_4 being able to do
1500-byte VLANs). In RELENG_6, e.g., this capability is announced by the
rl(4), so I can rely on it. But it seems to be an overkill to upgrade an
average not-so-fast router to RELENG_6 just to be sure that rl(4) supports
1500-byte VLANs correctly, isn't it?
Sincerely, Dmitry
--
Atlantis ISP, System Administrator
e-mail: [EMAIL PROTECTED]
nic-hdl: LYNX-RIPE
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