[c-nsp] Suspect MTU Issues

[Gert Doering]

Hi,

On Tue, Jul 12, 2011 at 07:46:00PM +0000, Leigh Harrison wrote:
> There is a legacy layer 2 network which has had an mpls network
> built over it.  A link between two of the data centres is a dark
> fibre between two Cisco 3750E switches running on the ten gig ports
> with a variety of vlans passing over a dot1q trunk.  Both of these
> switches are pretty much out of the box and have a standard system
> mtu of 1500.

You have an MTU problem.  If you want to send (1500 byte + extra header
bytes) packets over a link with a MTU of 1500 -> FAIL.

gert

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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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