Re: Different MTU Sizes in same VLAN

The problem might be when you try to send large jumbo UDP frames to a host
with MTU of 1500 bytes.

With TCP, the receiving host will signal its MSS to the sending host, so it
won't be a problem.

HTH,
Dan
Troubleshooting blog: http://dans-net.com

On Thu, Dec 3, 2009 at 5:52 PM, Tharindu Rukshan Bamunuarachchi <
btharindu_at_gmail.com> 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> 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
> >
> >
> > 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
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Thu Dec 03 2009 - 19:44:35 ART