[c-nsp] Ethernet Network

[Mohammad Khalil]

hi all 

thanks all for ur response

i checked where i can deploy MTU on my network
on the Cisco ME-C3750-24TE with IOS c3750me-i5-mz.122-35.SE5.bin
it has 4 G interfaces , 2 of them are MPLS enabled 
there is no command under the interface mode mtu 
but there is 
on the FE port
switch(config-if)#mpls mtu ?
  <64-1500>  MTU (bytes)
  override   Override mpls mtu maximum of interface mtu
on the GE port
ar6.HS-AMM-017(config-if)#mpls mtu ?
  <64-1512>  MTU (bytes)
  override   Override mpls mtu maximum of interface mtu

on the global mode:
switch(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
on the cisco ME-C6524GT-8S
switch(config)#system jumbomtu ?
  <1500-9216>  Jumbo mtu size in Bytes, default is 9216





> From: ip at ioshints.info
> To: td_miles at yahoo.com; cisco-nsp at puck.nether.net; DLasher at newedgenetworks.com
> Date: Wed, 13 Jan 2010 08:36:33 +0100
> Subject: Re: [c-nsp] Ethernet Network
> 
> The MTU on PA-FE (probably) does not include MAC header and definitely does not include CRC trailer. Otherwise the minimum value of 1500 wouldn't make sense.
> 
> > -----Original Message-----
> > From: Tony [mailto:td_miles at yahoo.com]
> > Sent: Wednesday, January 13, 2010 8:10 AM
> > To: cisco-nsp at puck.nether.net; DonnLasher
> > Subject: Re: [c-nsp] Ethernet Network
> > 
> > 
> > 
> > --- On Wed, 13/1/10, Lasher, Donn <DLasher at newedgenetworks.com> wrote:
> > 
> > >
> > > >> SNIP >>
> > > >1500 bytes max data + 22 max header + 4 CRC trailer + 4
> > > byte 802.1q tag
> > > >+16 up to 4 labels = 1546?
> > > >
> > > >Why not just enable jumbos and set it as high as
> > > possible?
> > >
> > >
> > > 1546 = largest MTU the 355x/356x switches, PA-FE, etc, will
> > > support, as
> > > I recall.
> > >
> > 
> > PA-FE are limited to 1530. You're correct about 1546 for the switches
> > though.
> > 
> > 7204(config)#int fa4/0
> > 7204(config-if)#mtu ?
> >   <1500-1530>  MTU size in bytes
> > 
> > 
> > 
> > 
> > __________________________________________________________________________
> > ________
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> > 
> 
> 
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