[c-nsp] SPAN destination on oversubscribed module

[Ben Hammadi, Kayssar (NSN - TN/Tunis)]

Thanks Phil, 

   The last question is about the effect of the SPAN on fabric load , the monitored traffic from other module will cross the fabric on its way to the replication engine of module WS-X6716-10T  and contribute on fabric load right ? 

Br.

BEN HAMMADI Kayssar
 
NOKIA SOLUTION NETWORKS
Lead Engineer -BroadBand Connectivity
JNCIE-M (#471), JNCIE-SP (#1147), CCIP 
Mobile : +216 29 349 952  /  +216 98 349 952
Skype : kayssar ben hammadi


-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of ext Phil Mayers
Sent: Thursday, January 09, 2014 3:57 PM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] SPAN destination on oversubscribed module

On 09/01/14 14:47, Ben Hammadi, Kayssar (NSN - TN/Tunis) wrote:
> Dears ,
>
> We have two 6509 interconnected via port-channel of two 10Ge port
> carrying about 3Gb. the module used is WS-X6716-10T and only the two
> mentioned port are used on this module for the moment . We are now
> adding a monitoring probe that will be connected on this module , the
> estimated monitored traffic is about 8Gb . Since this module has an
> oversubscription rate of 4:1 , i need to check :

You need to be really careful with this on a 6716. As you have hinted, 
you absolutely can blow away production traffic.

>
> *       On witch port it is recommended to connect the new probe
> without affecting the port channel

An unused port-group, or one with <2Gb/sec of TX traffic.

> *       can one port on this module reach 8Gb of monitored traffic

Yes, but only if the 4-port port-group has 8Gbit/sec of TX capacity.

> *       the monitored traffic will be added to the actual Swicth load
> or it is transparent ?

Not sure what this means.
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