Late on this but if you can vlan off your network for these older machines
that can work. What type of servers do you have?
If your servers have multiple gige ports on it.. you could dedicate 1 port
to feed the older machines on a separate vlan. Otherwise all machines on
your network need to have jumboframe support or your SOL. I am assuming these
MACs are not part of some AD windows network setup.. otherwise you will
need to do the same for 1 port in an AD server for it to authenticate..
-S
-----Original Message-----
From: Daniel Browne [mailto:dbrowne@(email surpressed)]
Sent: Wednesday, September 08, 2010 7:24 PM
To: void@(email surpressed)
Subject: Re: Jumbo Frames and Older Machines
[posted to rush.general]
The system rejects any mtu larger than 1518. We've had lots of other issues
with it as well, so we've basically got no choice but to change back to
standard.
On Sep 8, 2010, at 7:17 PM, Greg Ercolano wrote:
[posted to rush.general]
Up the MTU using ifconfig(1) to match the other boxes if you can.
I believe mismatched MTUs affects UDP packet assembly.
Daniel Browne wrote:
> We're in the midst of some network upgrades and are having some difficulties
> transitioning to using ethernet Jumbo frames. Several of our older
> machines (PowerMac G5's) do not have hardware support for Jumbo frames.
> The switch they are connected to allows me to configure frame mtu size
> on a per-port basis, but this is not preventing packet drops enough
> to allow Rush to work properly. Jobs are taking inordinately long
> (which may be due to NFS packet loss caused by jumbo frames) and
> I cannot push updated hosts list files to these machines.
>
> If anyone can suggest a solution I'm open to it, though we overall are
> having enough issues that we may need to abandon Jumbo frames altogether
> until such time as the older equipment is decommissioned.
--
Greg Ercolano, erco@(email surpressed)
Seriss Corporation
Rush Render Queue, http://seriss.com/rush/
Tel: (Tel# suppressed)ext.23
Fax: (Tel# suppressed)
Cel: (Tel# suppressed)
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