[c-nsp] 3750 running jumbo frames ?

[David Prall]

The 3750 and 3560 can only pass L2 jumbos. They are limited to a frame size
of 1998 for routed packets.

http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration
_example09186a008010edab.shtml#c3

David

--
http://dcp.dcptech.com
 

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of Jeff Fitzwater
> Sent: Thursday, June 11, 2009 10:14 AM
> To: Jeff Fitzwater
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] 3750 running jumbo frames ?
> 
> 	I forgot to mention that the hosts that will be using jumbo
> frames,
> will be on a separate VLAN between the two switches.  The concern was
> since the jumbo frame was a global change (all gig ports on 3750), how
> would it impact the other vlan that only has 1500 MTU hosts on.   I
> would assume there isn't any impact for hosts with a 1500 MTU, its
> just that the switch can now pass 9k frames if present.   The switch
> management was the other key issue.
> 
> 
> Thanks
> 
> 
> Jeff
> 
> 
> On Jun 11, 2009, at 9:44 AM, Jeff Fitzwater wrote:
> 
> > We have the need to run two 3750 switches with jumbo frames (9000),
> > for a high performance data transfer application.  Both switches
> > will be manages by connections to a NON-JUMBO frame environment.
> > (That is, if this will work)
> >
> > If I enable jumbo frames (which is a global change) and leave the
> > management interface MTU at 1500 so the switch will use 1500 as
> > packet size for all management, is there any NEGATIVE ISSUES I
> > should be aware because of them being connected to the non-jumbo
> > environment?
> >
> >
> >
> > Thanks for any help,
> >
> >
> >
> >
> > Jeff Fitzwater
> > OIT Network Systems
> > Princeton University
> > _______________________________________________
> > cisco-nsp mailing list  cisco-nsp at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > archive at http://puck.nether.net/pipermail/cisco-nsp/
> 
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/