[Ilugc] vyatta multiple ips on single nic

[Arun Khan]

On Fri, Mar 12, 2010 at 6:26 PM, Raja Subramanian
<rajasuperman at gmail.com> wrote:
> On Fri, Mar 12, 2010 at 3:20 PM, Arun Khan <knura9 at gmail.com> wrote:
>> There is *no* client side ISP router - just a modem for media conversion
>
> Without a client side router, you can't setup any VLANs.  Any VLAN
> config needs to be done at the ISP end as your modem is just an L2 bridge.
>
> Btw, which ISP are you using here?

Tulip

>
>
>> This would imply a switch supporting VLAN right?  If yes, the client
>> does *not* have the infra.
>
> A switch is not essential, you can use VLAN trunks between your
> device and the local router.  But as mentioned, you cannot run VLAN
> trunks to a modem, so VLANs do not apply to you and this discussion
> is just academic interest.
>

After I posted, google'd a bit more and arrived at the same
conclusion.  Thanks for the clarification nonetheless.

>> The appliance is an Intel Atom DG945GCLF based nettop with 2 NICs (one
>> for LAN and one for WAN)
>> Would appreciate some pointers If you are suggesting to do VLAN in
>> Linux on the WAN NIC.
>
> See vconfig/ifconfig man pages.  There's plenty of docs online, here's one:
> http://nixcraft.com/networking-firewalls-security/10447-linux-vlan-configuration.html

Ditto as above.  Looked at above link after google search :)

> Not all NICs support VLAN interfaces, the VLAN tags add 4 bytes to the ethernet
> frame so the NIC must support 1512 bytes MTU.  I have the same Intel Atom board
> at home and it runs tagged VLANs without any issues, so you'll have no problems.

That is good to know.   VLAN tag does not apply to my specific setup
confirmed by ISP and yourself.   The Atom board is an excellent
platform for small foot print appliance w/o the price tag.   Have you
been able to lay your hands on the DG945GCFL2 (Atom 930)?  It has 2
multi-threaded cores  (4 threads total).    I have been unable to get
any in the Mumbai channels.

Thanks again for your inputs.

-- Arun Khan