Preformance with PCF ?

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From: Arne Langmo
Date: Tue, 13 Oct 1992 09:45

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We have a remote site connected to our Cray YMP via:

Low-speed-channel -> DX4130 -> FDDI -> DX???? -> E3 -> DX???? -> Ethernet

In this config. there are set up three PCF filters on the link boxes, to
limit the access from FDDI to remote site.
There are no big error-rates logged on any interface.

Thru this config. they get a preformance of 80-90 kbits/s with FTP from
the Cray to a Convex on the ethernet!

I have seen that some kinds of PCF filters can slow down a NSC-router a bit.
But can PCF-filters cause such a terrible loss of preformance?

------------
Arne Langmo
SINTEF Runit
NORWAY

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arc1-ca.pugleaf.net!sparky!uunet!know!hri.com!noc.near.net!nic.umass.edu!caen!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!agate!dog.ee.lbl.gov!ucbvax!RUNIT.SINTEF.NO!Arne.Langmo

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Path: arc1-ca.pugleaf.net!sparky!uunet!know!hri.com!noc.near.net!nic.umass.edu!caen!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!agate!dog.ee.lbl.gov!ucbvax!RUNIT.SINTEF.NO!Arne.Langmo
From: Arne.Langmo@RUNIT.SINTEF.NO (Arne Langmo)
Newsgroups: comp.dcom.lans.hyperchannel
Subject: Preformance with PCF ?
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Date: 13 Oct 92 09:45:25 GMT
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