Hi Jeff,
Removing the DFC from a 65xx card & letting the PFC do the work is
HIGHLY preferable to letting traffic punt for your shortest mask
prefixes, which are the ones that won't get into the h/w if you blow
out the FIB TCAM.
In order of preference:
* get an XL DFC, list price on a DFC3CXL is like $15000
* remove the DFC from the card. You can do this easily on a 65xx card
(note that with 67xx cards you'd need a CFC around to replace it
with). 65xx without DFC will use the bus to get central lookups by
the PFC, & will use the fabric for sending data traffic to the egress module.
* just blow out the TCAM randomly and punt to the CPU. This is not
just "least preferred", it's bordering on "downright insane".
2 cents,
Tim
At 12:05 PM 3/26/2011, Jeff Kell quipped:
On 3/26/2011 2:32 PM, Jon Lewis wrote:
> On Sat, 26 Mar 2011, Jeff Kell wrote:
>> I intended to upgrade this to "something" suitable for full routing
>> tables, and went for a Sup720/PFC3CXL. A million routes, right?
>
> Not really. The million routes thing is highly misleading.
It at least "depends on a whole lot of things". I'll settle for half.
Just not 192K.
>> Received another WS-X6516-GBIC but with a DFC3A. Powers up, but
>> switches everything to "PFC3A" mode [192K routes]:
>
> If you're not doing that much traffic, is removing the DFC from the
> WS-X6516-GBIC an option?
I don't know, that's why I'm asking, but if that's a viable option, will
certainly give it a try.
Jeff
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Tim Stevenson, [email protected]
Routing & Switching CCIE #5561
Distinguished Technical Marketing Engineer, Cisco Nexus 7000
Cisco - http://www.cisco.com
IP Phone: 408-526-6759
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