[j-nsp] GigE: M10 <-> Cisco Catalyst 6509: oversized and corrupted frames

Matti Saarinen mjs at cc.tut.fi
Fri Mar 28 11:01:37 EST 2003

Josef Buchsteiner <josefb at juniper.net> writes:

> We need to differentiate between L2/L1 errors and L3 errors. In your
> case it is L3. Which means also that your Analyser needs to perform
> a data integrity check to catch a corrupted IP packet.

     I think (but don't know for sure. I haven't read the manual
     carefully enough. The analyser is Fluke OptiView.) that the
     analyser also checks the IP header. At least, it shows the
     network utilisation per TCP and UDP port etc.

> When you performed the  mirror function have you still seen that the
> 6509 complains about corrupted IP packets ?

     Yes, I have. I've changed the routing topology as well so that
     more traffic is going via the GigE link. The error messages
     haven't been showing up more frequently.

- Matti -

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