Hi,
mapping of ports on WS-X6708-10GE to ASIC's is quite different. It's
very common mistake.
First ASIC is mapped to ports ((1,4),(5,7)), second ASIC is mapped to
ports ((2,3),(6,8)).
Capacity of inner pairs is 16Gbit, quadruples are 20Gbit.
You can try to switch module to the performance mode (oversubscribed
ports will be shutdowned - "no hw-module slot x oversubscription"
It will disable ports 4,7,3,8.
All the best,
Jiri
Dne 9.1.2014 16:22, Sigurbjörn Birkir Lárusson napsal(a):
It¹s a given the load coming from other modules would go through the
fabric, whether inter module traffic does depends on which ports you are
using and how SPAN is handled with distributed-forwarding, must admit I¹ve
never given that much thought.
On the 6708 there are two ASICS ,one for port 1,3,5,7 and the other for
2,4,6,8 as I understood it. Traffic traveling between the ASICs needs to
go through the Fabric, Fabric within the ASIC does not.
I¹m assuming the situation on the 6716 is similar except then probably
with 4 asics instead of 2, so if the mirroring port and the monitoring
ports are all on the same asic, that bandwidth might be freed from going
over the fabric. I¹d try this in a lab before committing it though, these
cards are a bit dangerous. Should and does are not the same thing with
the 7600 platform (ever).
Kind regards,
Sibbi
On 9.1.2014 15:10, "Ben Hammadi, Kayssar (NSN - TN/Tunis)"
<kayssar.ben_hamm...@nsn.com> wrote:
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-boun...@puck.nether.net] On Behalf Of
ext Phil Mayers
Sent: Thursday, January 09, 2014 3:57 PM
To: cisco-nsp@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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