LARTC - Jan 2007 - Example on using fwmark with masks. Please help!!

Hi,
   could anyone provides any example about the use of ip route command to
force the use of one route using masks in the mark?

The configuration is:
   1 LAN (zlan0) iface
   N WAN (wan0 ... wanN) ifaces with static IPs and load balanced.
   iptables 1.3.7
   kernel 2.6.19.2
   iproute 2.6.19

I''m yet setting marks into packets for QoS and its working, I now want
to
set some bits (OR) at the end of the mark.

For example, I want to use 0x8000 to add another mark to the packet for
routing. The packet is market yet with a QoS mark (--set-mark), 0x5 (for
example).

I need:
   1) The packet been marked with 0x8000 OR 0x0005 = 0x8005
   2) Route the packet with 0x8005 AND 0x8000 = 0x8000 over wan0 (for
example)
   3) Classify the packet with 0x8005 AND 0x0005 into wan0 1:4 class (for
example)

I know how to do this not having sense about MASKs, but ... Could anybody
put here how to do it with them?

Another question: What is the length of the mask? 16bit? 32bit?

Thanks!!

Any help?

El Vie, 12 de Enero de 2007, 21:26, ArcosCom Linux User
escribió:
> Hi,
>    could anyone provides any example about the use of ip route command to
> force the use of one route using masks in the mark?
>
> The configuration is:
>    1 LAN (zlan0) iface
>    N WAN (wan0 ... wanN) ifaces with static IPs and load balanced.
>    iptables 1.3.7
>    kernel 2.6.19.2
>    iproute 2.6.19
>
> I''m yet setting marks into packets for QoS and its working, I now
want to
> set some bits (OR) at the end of the mark.
>
> For example, I want to use 0x8000 to add another mark to the packet for
> routing. The packet is market yet with a QoS mark (--set-mark), 0x5 (for
> example).
>
> I need:
>    1) The packet been marked with 0x8000 OR 0x0005 = 0x8005
>    2) Route the packet with 0x8005 AND 0x8000 = 0x8000 over wan0 (for
> example)
>    3) Classify the packet with 0x8005 AND 0x0005 into wan0 1:4 class (for
> example)
>
> I know how to do this not having sense about MASKs, but ... Could anybody
> put here how to do it with them?
>
> Another question: What is the length of the mask? 16bit? 32bit?
>
> Thanks!!
>
>
>
>
>
>

Do anybody explain this theme a bit?
Please, I need help with this.

Thanks!!!!

El Vie, 12 de Enero de 2007, 21:26, ArcosCom Linux User
escribió:
> Hi,
>    could anyone provides any example about the use of ip route command to
> force the use of one route using masks in the mark?
>
> The configuration is:
>    1 LAN (zlan0) iface
>    N WAN (wan0 ... wanN) ifaces with static IPs and load balanced.
>    iptables 1.3.7
>    kernel 2.6.19.2
>    iproute 2.6.19
>
> I''m yet setting marks into packets for QoS and its working, I now
want to
> set some bits (OR) at the end of the mark.
>
> For example, I want to use 0x8000 to add another mark to the packet for
> routing. The packet is market yet with a QoS mark (--set-mark), 0x5 (for
> example).
>
> I need:
>    1) The packet been marked with 0x8000 OR 0x0005 = 0x8005
>    2) Route the packet with 0x8005 AND 0x8000 = 0x8000 over wan0 (for
> example)
>    3) Classify the packet with 0x8005 AND 0x0005 into wan0 1:4 class (for
> example)
>
> I know how to do this not having sense about MASKs, but ... Could anybody
> put here how to do it with them?
>
> Another question: What is the length of the mask? 16bit? 32bit?
>
> Thanks!!
>
>
>
>
>
>