[c-nsp] SUP720 IDB Limit

Stephen Kratzer kratzers at ctinetworks.com
Fri May 8 11:26:23 EDT 2009


We're running at about 75% of the IDB limit on the 7200s, but I believe we're 
suffering from an IOS bug affecting the reclaiming of IDBs for virtual 
interfaces. In the absence of this bug or behavior, IDB limits shouldn't be a 
limiting factor.

What kind of hardware module limitations might bite us? We're just growing 
beyond the OC-3 level (ATM side) and looking to move up to an OC-12.


On Friday 08 May 2009 09:54:16 Arie Vayner (avayner) wrote:
> Stephan,
> Actually, scalability numbers on 7600 for DSL or broadband aggregation
> is not really directly related to IDB numbers, but to the scale of the
> HW modules - as sessions are terminated on distributed hardware
> resources.
> Arie
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Stephen Kratzer
> Sent: Friday, May 08, 2009 15:47
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] SUP720 IDB Limit
> All,
> We're looking to step up from the 7200 series to the 7600 series for DSL
> aggregation. Anyone know what the IDB limit is for this platform (#show
> idb)?
> We're at about 15000. Thanks.
> Stephen Kratzer
> Network Engineer
> CTI Networks, Inc.
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