HP3000-L Archives

February 2004, Week 3

HP3000-L@RAVEN.UTC.EDU

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Subject:
From:
John Pitman <[log in to unmask]>
Reply To:
John Pitman <[log in to unmask]>
Date:
Fri, 20 Feb 2004 08:16:50 +1100
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I tried pinging with increasing size, and the delay goes up in proportion,
until, by trial and error I find the break point is 1471 - times out. 1470
works with a time of 391ms. It sounds like an MTU problem, but I don't have
access to the routers to get any stats. The network provider has had
overnight to look at it, now, so back to the phone....I now also have a
second site doing the same thing.

TIA,
jp
----- Original Message -----
From: "James Hofmeister" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, February 20, 2004 4:56 AM
Subject: [HP3000-L] Network problem


> Hey Gang,
>
> Just a FYI:
>
> The MTU on the 3000 somewhat correlates to the NMMGR Network Segment Size
parameter.
>
> Path: NETXPORT.NI.LAN1
> [1514 ] Network Segment Size (Bytes)
>
> The value of 1514 is an internal buffer representation of the 1500 byte
frames for ethernet or 802.3 plus some overhead bytes.
>
> 1514 is the default/recommended value for 10MB and 100BT networks...
changes from this value may (YMWV) result in less than optimal performance
for these link types.
>
> If your switch/router vendor says to decrease this value to work with
their equipment, they probably have a bug they are working around.
>
> I hope this helps.
>
>
> Regards,
>
> James Hofmeister
> Email: <first>.<last>@hp.com
> Hewlett Packard - Global Solutions Engineering (WTEC)
> P.S. My Ideals are my own, not necessarily my employers.
>
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