YES !!! - - - >
Here at ARL (Army Research Lab), we had the same issues. Once we
demonstrated the variances and the networking team verified our claims
using checkpoint and other tools - the entire organization now 'hard
sets' the majority of our connections.
Thank you,
Samuel J. Coco, STG
Functional Area Manager, ARL
Sr UNIX Administrator
BELL 301 394-1151 DSN 290
CELL (B) 240 398-7121 / (H)443 496-1623
HOME 410 604-2415
Email scoco AT arl.army DOT mil
-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Paul
Boatman
Sent: Thursday, March 18, 2004 8:33 AM
To: Dwayne.Brzozowski AT mail.va DOT gov; veritas-bu AT mailman.eng.auburn DOT
edu
Subject: Re: [Veritas-bu] Is there an official document of client and
server N ICand switch settings
I work at the 6th largest university in the country. About 1 year ago,
the entire university was required to switch to AUTO-AUTO across ALL
platforms because of network infrastructure changes ("eek !"). The
impact on Veritas Netbackup has been ridiculous. Our drives are sitting
here getting 10%-20% thruput, and our capacity is maxed out when it
shouldn't be. Tape management and load balancing between 2 robots (1 of
which is maxed out tape-wise, the other is maxed out drive-wise) is a
nightmare. Upper management is blaming the software, scheduler, and
drive technology claiming that they are not sufficient.
Is anyone else in a similar situation ?
What are the "settings that work" Dwayne ? I am very interested.
Maybe we could present this info to our Network / Telecom guys. By the
way Dwayne, I am a veteran so I sure do appreciate you guys in the VA.
Thanks,
Paul
>>> "Biller, Tim" <Tim.Biller AT uk.experian DOT com> 3/18/2004 02:55:30 >>>
Hi Cheryl,
Have the Network Admins lock the switch port speed to 100Mbit and Full
Duplex and make sure the client NIC is set exactly the same on ALL the
servers. The Unix boxes will need setting explicitly as Mark says, and
a file added to ensure they stay that way after a reboot. (Your
sysadmins should know this....)
Most network switches always auto-negotiate to the lowest possible speed
so it's essential to lock this down. Any decent network admin should
know this....
Are you running on a dedicated backup LAN? If there's no impact on other
systems there's absolutely no reason not to max out the ports and NICs.
I'm not aware of any specific documentation that states that 100/Full
should be used but if performance sucks under autoneg and it flies under
100/Full then there's your argument. What tape drives are you using?
Are you using SSO?
Cheers - Tim
Date: Wed, 17 Mar 2004 12:03:10 -0700
From: "King, Cheryl" <cheryl.king AT intrado DOT com>
To: "Veritas-Bu \(E-mail\)" <veritas-bu AT mailman.eng.auburn DOT edu>
Subject: [Veritas-bu] Is there an official document of client and server
NIC and switch settings
Over and over again we have problems with poor performance with new
client backups and restores. Is there a document that says what the NIC
settings should be for each client type? For example we have highest
speed possible for all of them, half duplex for HP, and full duplex for
everything else, I think (I haven't checked every system and wasn't here
when some were implemented). Setting Auto detect on the switch seems to
not work correctly
(causes slow performance). I think the switches are set to match the
server, but have no way to verify that. I'd like to be able to present
an official document to the System Administrators and the Network
Engineers that states the correct configuration requirements. Does
Veritas have such a document or statement?
Is this a problem in other environments? Is this just an issue in
Veritas Backup environments? Are my SAs and Network Engineers not
following some
industry, standard, best-practices? I've been in IT for many years
but
working with Veritas NBU for 1 year. I don't recall ever having network
issues like this before.
NBU 4.5 FP5 Solaris 8 Master/Media
Clients OSF1_V5, HP-UX 11.00, HP-UX10.20, Windows2000, WindowsNT,
RedHat2.4, RedHat 2.2, Solaris8, Solaris7.
Thanks in advance.
Cheryl King
From: "Donaldson, Mark" <Mark.Donaldson AT experianems DOT com>
To: "'King, Cheryl'" <cheryl.king AT intrado DOT com>,
"Veritas-Bu (E-mail)"
<veritas-bu AT mailman.eng.auburn DOT edu>
Subject: RE: [Veritas-bu] Is there an official document of client and
serv
er NIC and switch settings
Date: Wed, 17 Mar 2004 12:31:48 -0700
The network settings are outside Netbackup control.
You should always set to your highest possible speeds. For many
server/switch combinations, auto-negotiation fails to negotiate the
highest settings and they must often be forced to the best setting using
ndd or similar utilities.
Half-duplex performance stinks - are you sure that's what only what HP
can do?
Your network person should be able to query a smart-enough switch for
the switch port settings, the SA should be able to query the ethernet
port for the same settings.
This e-mail has come from Experian International: winner of the UK's
National Business of the Year Award 2003.
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