Cisco 7600 (7609) as a core BGP router.

Sat Jul 18 10:05:32 UTC 2009

Can someone provide a link, or more detail, on the netflow issues.
Particularly as they relate to 6509's and sup720's.

Thanks!

On 7/18/09, Roland Dobbins <rdobbins at arbor.net> wrote:
>
> On Jul 18, 2009, at 2:37 PM, Saku Ytti wrote:
>
>> I'm guessing point Roland was making (which he likely would have not
>> made couple moons ago:)
>
> I've made this point for years, quite publicly, actually - even when
> it was unpopular for me to do so in certain quarters.
>
> ;>
>
> uRPF for 7600/6500 can only be in one mode for the whole box, all
> interfaces.  This is a major problem in many cases.
>
> The NetFlow issues render flow telemetry unusable in production
> situations.
>
> The ACLs work very differently on this platform due to LOU issues, as
> you say.  Most folks don't know this, and many end up overflowing
> their TCAMs and not realizing it until their boxes fall over, heh.  If
> one has fairly complex ACLs covering various ranges of ports, ACLs on
> 7600/6500 quickly become very difficult to manage.
>
>> EARL8 (Nexus7k) fixes the IPv6/uRPF and IPv6/ACL issue.
>
>
> And the NetFlow issues.
>
> -----------------------------------------------------------------------
> Roland Dobbins <rdobbins at arbor.net> // <http://www.arbornetworks.com>
>
>          Unfortunately, inefficiency scales really well.
>
> 		   -- Kevin Lawton
>
>
>

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