Re: Different MTU Sizes in same VLAN

You sure about that? :)

INE-SW1(config)#system mtu ?
  <1500-1998> MTU size in bytes
  jumbo Set Jumbo MTU value for GigabitEthernet or TenGigabitEthernet
               interfaces
  routing Set the Routing MTU for the system

INE-SW1(config)#system mtu j ?
  <1500-9000> Jumbo MTU size in bytes

INE-SW1(config)#

Jumbo MTU is different than just MTU. But what does MTU actually mean
in terms of frame movement? The only time we really care about it is if
mine is bigger than yours and I try to send a larger frame than you are
willing to accept. (Size DOES matter)

*Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider) #4713,

JNCIE-M #153, JNCIS-ER, CISSP, et al.

JNCI-M, JNCI-ER

evil_at_ine.com

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http://www.InternetworkExpert.com

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Power corrupts.

Study hard and be Eeeeviiiil......

Tharindu Rukshan Bamunuarachchi wrote:
> thanx a lot for the response.
>
> YES, I can set MTU to 9000.....
>
> If I enable MTU=9000 in switch ...
>
> how does switch recognize MTU size from/to different hosts ?
>
> how do hosts negotiate for specific MTU size ?
>
>
> cheers
>
>
> On Thu, Dec 3, 2009 at 7:14 PM, Scott Morris <smorris_at_ine.com
> <mailto:smorris_at_ine.com>> wrote:
>
> Is it possible? Sure... But ask what the differences are.
>
> On your switch. CAN you set the MTU to 9000? That'll most
> likely help
> you answer your question there. And specifically thinking about what
> ethernet frames with a size of 9000 are called. Are these treated
> differently?
>
> HTH,
>
>
>
>
> *Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider)
> #4713,
>
> JNCIE-M #153, JNCIS-ER, CISSP, et al.
>
> JNCI-M, JNCI-ER
>
> evil_at_ine.com <mailto:evil_at_ine.com>
>
>
> Internetwork Expert, Inc.
>
> http://www.InternetworkExpert.com
>
> Toll Free: 877-224-8987
>
> Outside US: 775-826-4344
>
>
> Knowledge is power.
>
> Power corrupts.
>
> Study hard and be Eeeeviiiil......
>
>
>
>
>
> Tharindu Rukshan Bamunuarachchi wrote:
> > hi all,
> >
> > this is not directly related CCIE ... but that would be great if
> you could
> > answer ...
> >
> > Is it possible to keep 1500 and 9000 MTU enabled hosts in same VLAN.
> >
> > we have about 30+ boxes connected over 10G ethernet. we need to
> enable Jumbo
> > (MTU=9000) in few boxes.
> >
> > 1. Do we have to create seperate VLAN for MTU=9000 hosts ?
> > 2. Is it possible to mix both MTU enabled hosts in same vlan ?
> > 3. Is it depends on Switch and OS of hosts ?
> >
> > thankx a lot.
> >
>
>
>
>
> --
> Tharindu Rukshan Bamunuarachchi

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Received on Thu Dec 03 2009 - 11:50:34 ART