From: Noble (noble.ccie@gmail.com)
Date: Wed May 03 2006 - 12:33:18 ART
> Hi William,
>
> How can I set it correctly? Please advice.
>
> My Cisco router has 2 ethernet interfaces. One is connected to Internet
> and other is connected LAN. Both of them are currently on MTU 1500.
>
> If we change the MTU on interface, will I loose my network connectivity? I
> am actually remotely accessing the router.
>
> Thanks,
>
> -Noble
>
>
> On 5/3/06, Beernink, William <william.beernink@siemens.com> wrote:
> >
> > Hi Noble,
> >
> > This is possibly due to an mtu size problem, which is not negotiated
> > during tcp setup
> > When the mtu size is not negotiated both parties think they can use
> > 1500.
> > When using ftp or mail the df bit is possibly set. Because of that the
> > packets will be dropped because of the extra overhead of ipsec.
> > (the complete packet will be bigger then 1500 bytes)
> >
> > Regards William
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto: nobody@groupstudy.com] On Behalf Of
> > Noble
> > Sent: woensdag 3 mei 2006 15:53
> > To: Cisco certification
> > Subject: OT: IPSec VPN Tunnel not allowing large data transfer
> >
> > Hello GS,
> >
> > I have a cisco router connected to nortel contivity box and doing IPSec
> > VPN
> > tunnel.
> > I am able to ping / telnet to the other side network from the Cisco
> > Router
> > side network but unable to send large mails / ftp data. I am also able
> > to
> > send small mails with few lines. My mail server and ftp server are
> > sitting
> > at Nortel Contivity Side.
> >
> > Any direction to resolve this issue will be higly appreciated.
> >
> > Thanks,
> >
> > -Noble
> >
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