From: John Matus (john_matus@hotmail.com)
Date: Wed Jun 15 2005 - 14:23:36 GMT-3
so then, if the system mtu is set at a value less than the interface mtu,
the the packet will not be fragmented?...perhaps dropped?
>From: "ccie2be" <ccie2be@nyc.rr.com>
>To: "'John Matus'" <john_matus@hotmail.com>, <ccielab@groupstudy.com>
>Subject: RE: system mtu
>Date: Wed, 15 Jun 2005 08:04:47 -0400
>
>John,
>
>Suppose a router had a bunch of serial interfaces with an MTU of 10,000 and
>an ethernet interface with an MTU of 1500.
>
>And, let's say the system MTU was set to 10,000 and the eth interface MTU
>was set to 1500.
>
>Now, the router wants to send a packet of size 3000 out the ethernet
>interface.
>
>Based on the system MTU, no fragmentation is needed. What does the router
>do?
>
>Since it's not possible to send a 3000 byte packet out an ethernet
>interface
>with a max MTU of 1500, I would say the router will fragment that packet.
>
>HTH, Tim
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>John
>Matus
>Sent: Wednesday, June 15, 2005 12:32 AM
>To: ccielab@groupstudy.com
>Subject: system mtu
>
>question regarding mtu on an interface and globally and how the 2 interact
>with each other...
>i think i know part of it but i don't know which direction it works..
>
>is it - if the interface exceeds it's own mtu, then it will fragment
>packets in accordance with the system mtu? or is it the other way
>around....
>or....
>
>is the global mtu the default for all interfaces and the interface mtu just
>overrides the global setting?
>
>TIA
>
>_________________________________________________________________
>Express yourself instantly with MSN Messenger! Download today - it's FREE!
>http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
>
>_______________________________________________________________________
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
>
This archive was generated by hypermail 2.1.4 : Wed Jul 06 2005 - 14:43:41 GMT-3