[c-nsp] changes in 7600 with DFC3BXL

[vince anton]

Arie,

thanks - is there any cisco document that goes into some detail about the
various changes in behaviour/options between pfc and dfc, or should I open a
case with TAC ?


thanks

Mark

2009/2/10 Arie Vayner (avayner) <avayner at cisco.com>

> Anton,
>
> With regards to policing, what would happen is that each DFC would have
> its own policers, so if you a policy applied for a VLAN which has ports
> on different module, each module would have its own policer with the
> configured rate. This means that if you set a 10Mbps policer, but you
> have ports on 2 separate cards, each card would apply a separate 10Mbps
> policer (allowing in total a potential 20Mbps rate).
> The same, BTW, applies to aggregate policers.
>
> The only change I can remember right now with regards to Etherchannel is
> the optional capability of specifying a load balancing algorithm per
> module.
>
> Arie
>
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of vince anton
> Sent: Tuesday, February 10, 2009 15:06
> To: cisco-nsp
> Subject: [c-nsp] changes in 7600 with DFC3BXL
>
> hey all,
>
> Quick question for you, hope you can help me.
>
> Im working on installing the DFCs in existing 67xx cards in our 7600s:
>
> 7606 w/SUP720-3BXL
> 2 x 6748-GE-TX
> 1 x 6704
>
> Im aware there are some differences in how the box reacts when a DFC is
> installed (the PFC will no longer need to make all the decisions,
> etc...).
> In particular this seems to change the beahviour for qos policers as
> well as
> L2 etherchannels.  Im using both of these, but I cant seem to find any
> definite documentation on CCO explaining the exact changes and perhaps
> any
> recommendations.  Of course I need to know how the box will behave in
> order
> to plan for this as part of the DFC upgrade, and so far all I found was
> an
> FAQ at
> http://www.cisco.com/en/US/products/hw/switches/ps708/products_qanda_ite
> m09186a00809a7673.shtmlwhich
> doesn't give so much detail, and a few items in the archives of the
> list which touched the surface but didnt dig deep.
>
> would appreciate if anyone can share any detailed info as to how qos and
> etherchannel behaviour changes in PFC vs DFCX3BXL
>
> thanks,
>
> anton
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-- 

Thanks,

anton