VLAN 802.Q routing question

NTDEV
1

I am investigating alternatives that would allow me to
do VLAN 802.Q tagging on packet going out/in to an NT box.
My question: is it possible to write some kind of driver
that output this tag on outgoing messages and remove them on
incoming messages?
Or is there any other way to do this?
Thanks,

Satrio Mualim

2

The NDIS adapter driver for Intel 82559 device drivers has support for VLAN
tagging. Basically, the upperlayer protocols put their packets to the
device driver and then the device driver configures the adapter to insert
the tag on the way out and then de-insert the tag on the way in. For you to
do this generically for all adapters that can possibly work in an NT box,
you would need to write and intermediate driver which would insert/deinsert
the tags. However, if you do this, then the performace will likely be not
so good because there will be too many memory copies in the IM driver.

Dominick Cafarelli

-----Original Message-----
From: xxxxx@agcs.com [mailto:xxxxx@agcs.com]
Sent: Tuesday, October 24, 2000 8:15 AM
To: NT Developers Interest List
Subject: [ntdev] VLAN 802.Q routing question

I am investigating alternatives that would allow me to
do VLAN 802.Q tagging on packet going out/in to an NT box.
My question: is it possible to write some kind of driver
that output this tag on outgoing messages and remove them on
incoming messages?
Or is there any other way to do this?
Thanks,

Satrio Mualim

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3

“Cafarelli, Dominick” wrote:

The NDIS adapter driver for Intel 82559 device drivers has support for VLAN
tagging. Basically, the upperlayer protocols put their packets to the
device driver and then the device driver configures the adapter to insert
the tag on the way out and then de-insert the tag on the way in. For you to
do this generically for all adapters that can possibly work in an NT box,
you would need to write and intermediate driver which would insert/deinsert
the tags. However, if you do this, then the performace will likely be not
so good because there will be too many memory copies in the IM driver.

Dominick Cafarelli

Thanks for the info, just some more questions :wink:

  1. how do you configure/inform such an adapter to do the tagging?
  2. is it possible to configure the NDIS adapter driver for the 82559 to output
    (and strip) different VLAN tags based on say the destination IP?
  3. do you know if the Intel 82558 device driver has the same features?
    Thanks again,

Satrio Mualim