[VLAN] Re: newbie question on enabling vlan feature in the driver

[Ben Greear]

kmk wrote:
> Ben, I enabled vlan in the eth mac by writing to vlan1tag and adjust mtu 
> to handle
> vlan. Now, when I ping from a remote pc which also has vlan enabled 
> interface,
> I don't see vlan tags in the frames. Same issue if I ping the remote PC. 
> Basically,
> I don't see vlan tag in tx/rx directions.

Show me ifconfig -a on the VLAN machine, and what commands
you are using to ping.

If you want to give me ssh access to the system, I'll log
in and take a look..

Thanks,
Ben

> 
> /kmk
> 
> On 3/13/07, *Muthu Kumar* <km7kumar at gmail.com 
> <mailto:km7kumar at gmail.com>> wrote:
> 
>     Ben,
> 
>     Thanks for your response. The mac data sheet says, when 0x8100 is
>     written to the
>     van1_tag register, the mac compares 13th & 14th bytes of incoming
>     frame and, if it
>     finds a match, it sets vlan1 bit in rx status register. However,
>     this particular status
>     bit is not actually exposed to driver access. The documentation
>     could be wrong.
> 
>     Other than the above, no behaviour changes. In this case, I just
>     simply ensure
>     that the driver/chip can handle MTU + 4 bytes? No need to enable
>     NETIF_VLAN_HW_TX/RX
>     and related callbacks?
> 
>     By the way, I don't see my postings @
>     http://ns2.lanforge.com/pipermail/vlan/2007-March/thread.html
>     <http://ns2.lanforge.com/pipermail/vlan/2007-March/thread.html>.
> 
>     Thanks
>     /kmk
> 
> 
>     On 3/13/07, *Muthu Kumar* < km7kumar at gmail.com
>     <mailto:km7kumar at gmail.com>> wrote:
> 
>         'm trying to enable VLAN in my eth driver. The eth mac supports
>         vlan processing and has a register (vlantag1) that should be
>         written
>         with 0x8100 to enable VLAN processing. Other than this, the mac
>         does
>         not have any other vlan related registers or anything else. It
>         does not give
>         any indication during rx if VLAN pkts received.
> 
>         How do I enable VLAN in my driver for such a MAC? I'm basically
>         confused with all the callbacks such as vlan_rx_register etc most
>         drivers support.
> 
>         Currently, in my driver I've enabled the features
>         NETIF_VLAN_HW_TX/RX
>         and providing the above callbacks. But I'm not sure whether
>         these flags
>         are applicable to my driver.
> 
>         what else I need to do? I'm kinda stuck here. Any help would be
>         highly
>         appreciated.
> 
>         thx
>         /kmk 
> 
> 
> 
> 
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-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com