[nsp] Cat 6500 jumbo frame support anomolies

[Keoseyan, Scott]

No, they're connected up at 1000... 



> -----Original Message-----
> From: tomhol at corp.earthlink.net [mailto:tomhol at corp.earthlink.net]
> Sent: Wednesday, April 09, 2003 10:52 AM
> To: cisco-nsp at puck.nether.net
> Subject: Re: [nsp] Cat 6500 jumbo frame support anomolies
> 
> 
> Scott-
> 
> Is the connection 100 Mb? The WS-X6516-GE-TX uses an 
> Application Specific 
> Integrated Circuit that limits it to an MTU size of 8092 
> bytes at 100 Mb. 
> At 10/1000 Mbps, up to 9216 bytes can be supported.
> 
> -Tom
> 
> 
> At 09:41 AM 4/9/2003 -0400, Keoseyan, Scott wrote:
> >Hello,
> >
> >I have enabled jumbo frame support on a 6500 (CatOS 7.2.2 with 
> >WS-X6316-GE-TX) and then on a couple Netfinity X-series servers 
> >w/1000Base-T NICs and I am seeing some strangeness.
> >
> >Performance seems sluggish between these two devices and the two 
> >interfaces on the switch are recording giants.  I checked 
> the IBM docs for 
> >the NIC and they state either that the frame-size is 9000 
> bytes or 9KB 
> >(9216 bytes) (they were unclear) which should be fine as the 
> jumbo-frame 
> >size on the switch is 9216 bytes.  I don't have the server 
> NICs configured 
> >for anything special other than I have the secondary NIC 
> configured as a 
> >stand-by port connected to another switch, and I am 
> wondering why I would 
> >still be seeing giants and why the performance is off.
> >
> >Would anyone have any ideas?  I have disabled jumbo-frame 
> support on the 
> >switches and the servers for the time being but I am 
> concerned that having 
> >it turned on would be a problem.
> >
> >-sak
> >
> >
> >
> >_______________________________________________
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> 
> __________________
> Tom Holbrook
> Sr. Network Engineer
> Earthlink - Atlanta
> 
> 'Safe?' said Mr. Beaver...'Who said anything about safe? 
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> --The Lion, the Witch and the Wardrobe
> 
> 
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