I am hoping to learn from the great pool of experience on this list. We currently have 2 OC3 connections going to 2 seperate providers. We are using netflow statistics to balance our traffic flows (which outgoing is our major concern). Flow tools, snmp output, some custom scripts, and some bgp weighting does the trick. We are in the process of upgrading to Cisco 12012 GSRs, and adding additional connectivity. We need to find something we can use to do the same type of thing on the 12012 GSR. The custom scripts work fine.. but it appears some line cards don't support netflow. 1) Is there an open source software that will assist us in load sharing? 2) Are there specific cards we need for netflow on a 12000 series? Is the difference based on Line Card Engine (0,1,2,3,etc)? 3) Is there an alternate way to control outgoing traffic flow to multiple upstreams using bgp (besides splitting the address range up and blindly pointing chunks to each provider)? Thanks, -Chris Strandt Liquid Web Inc
Chris, Take a look at Cisco OER http://www.cisco.com/en/US/netsol/ns471/ networking_solutions_package.html or Route Science http://www.routescience.com/technology/index.html. You could also continue doing what you are doing, The 12k supports BGP, Netflow, SNMP and some custom scripts -Matt On Sep 17, 2004, at 8:40 PM, Chris Strandt wrote:
I am hoping to learn from the great pool of experience on this list.
We currently have 2 OC3 connections going to 2 seperate providers. We are using netflow statistics to balance our traffic flows (which outgoing is our major concern). Flow tools, snmp output, some custom scripts, and some bgp weighting does the trick.
We are in the process of upgrading to Cisco 12012 GSRs, and adding additional connectivity. We need to find something we can use to do the same type of thing on the 12012 GSR. The custom scripts work fine.. but it appears some line cards don't support netflow.
1) Is there an open source software that will assist us in load sharing? 2) Are there specific cards we need for netflow on a 12000 series? Is the difference based on Line Card Engine (0,1,2,3,etc)? 3) Is there an alternate way to control outgoing traffic flow to multiple upstreams using bgp (besides splitting the address range up and blindly pointing chunks to each provider)?
Thanks, -Chris Strandt Liquid Web Inc
It looks like OER doesn't support 12K routers... although its been awhile since I looked at Route Sciences.. I will look at that in more detail. It appears only certain Line Cards support Netflow (Engine 2 and up) with varying performance degradation. -Chris Matthew Crocker wrote:
Chris,
Take a look at Cisco OER http://www.cisco.com/en/US/netsol/ns471/ networking_solutions_package.html or Route Science http://www.routescience.com/technology/index.html. You could also continue doing what you are doing, The 12k supports BGP, Netflow, SNMP and some custom scripts
-Matt
On Sep 17, 2004, at 8:40 PM, Chris Strandt wrote:
I am hoping to learn from the great pool of experience on this list.
We currently have 2 OC3 connections going to 2 seperate providers. We are using netflow statistics to balance our traffic flows (which outgoing is our major concern). Flow tools, snmp output, some custom scripts, and some bgp weighting does the trick.
We are in the process of upgrading to Cisco 12012 GSRs, and adding additional connectivity. We need to find something we can use to do the same type of thing on the 12012 GSR. The custom scripts work fine.. but it appears some line cards don't support netflow.
1) Is there an open source software that will assist us in load sharing? 2) Are there specific cards we need for netflow on a 12000 series? Is the difference based on Line Card Engine (0,1,2,3,etc)? 3) Is there an alternate way to control outgoing traffic flow to multiple upstreams using bgp (besides splitting the address range up and blindly pointing chunks to each provider)?
Thanks, -Chris Strandt Liquid Web Inc
Chris,
I am hoping to learn from the great pool of experience on this list.
We currently have 2 OC3 connections going to 2 seperate providers. We are using netflow statistics to balance our traffic flows (which outgoing is our major concern). Flow tools, snmp output, some custom scripts, and some bgp weighting does the trick.
For his Ph.D. thesis, Steve Uhlig developped and evaluated by simulations several techniques to solve this problem. You can find details about those techniques in his thesis : http://www.info.ucl.ac.be/~suh/thesis.ps.gz A description of these techniques is expected to appear soon in ACM Computer Communication Review. The techniques were evaluated by using simulations performed with perl scripts on Netflow traces. The perl scripts are also available from Steve's website : http://www.info.ucl.ac.be/~suh In parallel to this work, we are developping an open source traffic engineering toolbox ( http://totem.info.ucl.ac.be ). If there is interest from network operators, we could place some of the scripts developped by Steve in the toolbox. Best regards, Olivier Bonaventure -- CSE Dept. UCL, Belgium - http://www.info.ucl.ac.be/people/OBO/
participants (3)
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Chris Strandt -
Matthew Crocker -
Olivier Bonaventure