🚀 go-pugleaf

We have a CD 4680 file server running EP/IX connected to an FDDI ring. All
workstations are connected to an Ethernet (let's say there is just one).
An NSC/DX router routes between FDDI and Ethernet.

We have just setup this config, and are experiencing long delays that we
suspect to be due to fragmentation of NFS packets on the NSC/DX. In order
to prevent this fragmentation, we are considering 2 scenarios:

1) Tell the CD 4680 to use an MTU of 1500 rather than 4352 when it uses
   its FDDI interface for outgoing traffic.

2) Tell the CD 4680 to use an MTU of 1500 when it uses its FDDI interface
   for outgoing traffic to our Ethernet subnet, and an MTU of 4352 when
   traffic is directed to any other subnets.

Is any of these scenarios possible ? I RTFM'ed but didn't find a way to
change the FDDI MTU. Any idea ?

Thanks in advance

/----------------------------------------------------\
| Jean-Philippe Martin-Flatin                        |
| European Centre for Medium-Range Weather Forecasts |
| Shinfield Park                                     |
| Reading RG2 9AX                                    |
| England                                            |
|----------------------------------------------------|
|  Disclaimer: I speak for myself, not my employer   |
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