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Re: VRF/MPLS on Linux
From: Brian Raaen <nanog () rhemasound org>
Date: Tue, 23 Aug 2011 10:43:20 -0400

Jared,
    Thank you for your reply.  The one issue I have is how can I label traffic to match a given table (i.e. ping VRF or 
snmp VRF).  I don't see any way this can be done with normal BSD sockets, finding a way to get my application to 
'color' the traffic has been a little evasive.  The developers I am working with are using Mule for their data 
collection.  I would really prefer to add an MPLS tag to mark the traffic, but I will investigate what I can do using 
the Linux routing features and 802.1q tags.

---
Brian Raaen
Network Architect
braaen () zcorum com

On Tue, Aug 23, 2011 at 09:50:30AM -0400, Jared Mauch wrote:

On Aug 23, 2011, at 9:45 AM, nanog () rhemasound org wrote:

While I have found some information on a project called linux-mpls I am having a hard time finding any solid VRF 
framework for Linux.  I have a monitoring system that needs check devices that sit in overlapping private ip space, 
and I was wondering if there is anyway I could use some kind or VRF type solution that would allow me to label the 
"site" the traffic is intended for.  The upstream router supports VRF/MPLS, but I need to know how I can get the 
server to label the traffic.  I would appreciate any input.

In linux, you can manage the different routing tables.

You can do this with the iptables + iproute2 series of commands.  The tables 254/255 are the main and local tables.

You shouldn't have too much trouble finding information via google on how to manage your needs.

- Jared


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