Re: [mpls-linux-general] Traffic for port in MPLS??

[James R. L. <jl...@mi...>]

Hello,

When working with mpls-linux you should first ask yourself the
question 'how would I do this on linux without MPLS?'.  The answer,
more often then not will also apply to mpls-linux.

For example, you're wondering how do you influence or control traffic
based on source or dst port when using linux.  The answer is iptables.
Similaly, if you want to direct traffic on to a LSP based on source or
dst port, you can use iptables with some MPLS specific modifications.

So first off you will need a MPLS enabled version of iptables, if you are
using my RPMs, you can just download the iptables RPM, install it, and your
ready to go.  Otherwise you will need to compile your own iptables and
install it, look at the READMEs in he mpls-linux tar ball for more info.

Once you have a MPLS enabled iptables, you can add the following target to
any iptables command:

-j spec-nh --spec_nh 0x8847:0x2

where 0x8847 tells the spec_nh system to redirect the traffic
to MPLS and the 0x2 tells MPLS you want to map traffic to the
NHLFE with key 0x2

For example:

iptables -A OUTPUT -d 128.104.17.130/32 -j spec_nh --spec_nh 0x8847:0x2

maps all traffic with the dest ip address of 128.104.17.130 to the
MPLS NHLFE with key 0x2

You will need to read more on how to map source or dest TCP/UDP ports, but
you can learn that from any iptables howto.

Good luck!

On Mon, Apr 11, 2005 at 05:06:55PM +0000, Miki Kazanovez wrote:
> Hello, I am student of ETIS.
>=20
> I have a FC3, and MPLS-linux installed correctly.
>=20
> I have the follow graph:
>=20
> UNDER MPLS:
>=20
>  FC3_A   --------------ALL the traffic in MPLS---------> FC3_B
>          <-----------------------------------------------
>=20
>=20
> How to administrative the traffic for the port??
> I want that traffic of port 80, follow one path, and the traffic of port =
22=20
> follow other path. (fot example)
>=20
>=20
>          --------------Only port 22/TCP in MPLS--------->
>          <-----------------------------------------------
>   FC3_A  						   FC3_B
>          --------------Only port 80/TCP in MPLS--------->
>          <-----------------------------------------------
>=20
>=20
>=20
> I have use the mpls command or quagga package??? I can find util doc???
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> thank you!!!
>=20
> _________________________________________________________________
> M?viles, DVD, c?maras digitales, coleccionismo... Con unas ofertas que ni=
=20
> te imaginas. http://www.msn.es/Subastas/
>=20
>=20
>=20
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--=20
James R. Leu
jl...@mi...