Mirroring CoS1 traffic in a MPLS enabled 6500

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May 22nd, 2008
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Hi


I have all classes of service flowing through a cat6k into my core router. MPLS is enabled on the cat6k also. The uplink port used is a 10G.


Now for i need to connect a monitoring device on the cat6k which supports 1G only. I need to mirror the CoS1 traffic EXP5 on to a port where the monitoring probe would connect.


How can i achieve this?

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n.nandrekar Tue, 05/27/2008 - 00:29
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hi!

Can you give more details on the kind of cards where you want to capture ( the 10G and 1 G ones?) Want to know if they are WAN cards or Lan cards.


If the 10G is a WAN card, You can use VACL capture to filter the exact traffic :

http://www.cisco.com/en/US/tech/tk389/tk814/technologies_configuration_example09186a00808122ac.shtml


In case both are LAN cards, u could use SPAN to capture ( monitor session xx....)


Regards,

Niranjan

abhishek2525 Mon, 06/02/2008 - 02:49
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I am talking about MPLS labeled packets. Does VACL or span help you filter out labeled packets? I need to filter out only the EXP 5 packets.

n.nandrekar Mon, 06/02/2008 - 03:15
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VACL might be able to filter the exact packets. Am not 100% sure and have to check the configuration. SPAN wont be able to filter them directly.

But in any case, you can recieve all the packets and set a filter on the capture software like ethereal. wont that serve the purpose?


Regards,

Niranjan

abhishek2525 Mon, 06/02/2008 - 05:55
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Does VACL help you to filter labeled packets? If i want to filter packets that are marked as EXP 5?

n.nandrekar Mon, 06/02/2008 - 21:53
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VACL ises a regular ip acl for its filtering condition. Since you cannot filter packets based on exp in a regular ACL, ihat might not be possible for VACL too.

As I am saying you can run VACL to capture all packets and on the capture view of your capture tool, you could run a filter to get the exp5 packets u need.


Regards,

Niranjan

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