[c-nsp] Fragmentation on SUP720

[Rodney Dunn]

On Mon, Sep 08, 2008 at 08:52:14AM -0500, Vidali, Alaerte (NSN - BR/Rio de Janeiro) wrote:
> Hi Rodney,
> 
> My advice is also to avoid it. Customer says they are out of option and
> due to issue on system they want to see if Cisco can handle
> fragmentation for some time until get definitive solution.  
> 
> Do you know if fragmentation is done in SUP720, no matter what interface
> module is installed?

IIRC it's punted and dune under interrupt on the RP CPU. I don't know
the performance numbers because it's not advised so we do little to no
testing on those setups.

Rodney

> 
> Br,
> Alaerte
> 
> -----Original Message-----
> From: ext Rodney Dunn [mailto:rodunn at cisco.com] 
> Sent: segunda-feira, 8 de setembro de 2008 10:28
> To: Vidali, Alaerte (NSN - BR/Rio de Janeiro)
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] Fragmentation on SUP720
> 
> Why are you doing it?
> 
> There are some whacky issues it can cause. ie: it will break PMTUD if
> it's an MPLS core and it's sup720s on each end of the LSP.
> 
> Rodney
> 
> 
> On Mon, Sep 08, 2008 at 08:15:53AM -0500, Vidali, Alaerte (NSN - BR/Rio
> de Janeiro) wrote:
> > 
> >  Hi,
> > 
> > Any reference about fragmentation x CPU usage on SUP720?
> > 
> > Tks,
> > Alaerte
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