Re: Aarrggh! 519 error...-Spanning Tree Protocol?

[Matthew Tevenan]

Title: Re: Aarrggh! 519 error...-Spanning Tree Protocol?



Hi Lindsay,

Off-list, I'll resend the e-mail April in tech support sent you directly. Not sure what happened or why you didn't get it, but I'd encourage you to follow up with [EMAIL PROTECTED] if you have further questions. I'm afraid I don't have any more suggestions at this time...

Matthew Tevenan
Technical Support Specialist
Dantz Development Corporation
925.253.3050 
[EMAIL PROTECTED] 

From: Lindsay Robertson <[EMAIL PROTECTED]>
Reply-To: "retro-talk" <[EMAIL PROTECTED]>
Date: Tue, 1 Aug 2000 09:19:59 +1200
To: "retro-talk" <[EMAIL PROTECTED]>
Subject: RE: Aarrggh! 519 error...-Spanning Tree Protocol?


Thanks, but STP is disabled, and the problem still occurs even when I set up retrospect on an old PPC 601.

I firmly believe its an incompatibility between protocols retrospect uses and the HP 2424m
HP have been helpful in supplying information about their switch which supports
IEEE 802.1q, 802.1p, 802.1d, 802.3x

I wrote to Dantz weeks ago but have not even had a reply!


l.
-- 
---

Lindsay Robertson

Senior Technician
Psychology Department 
University of Otago
PO box 56
Dunedin
New Zealand

Phone   64 3 479 7668
Fax    64 3 479 8335

RE: Aarrggh! 519 error...-Spanning Tree Protocol?

[Lindsay Robertson]

Title: RE: Aarrggh! 519 error...-Spanning Tree
Protocol?


Thanks, but STP is disabled, and the problem
still occurs even when I set up retrospect on an old PPC
601.

I firmly believe its an incompatibility between
protocols retrospect uses and the HP 2424m
HP have been helpful in supplying information
about their switch which supports
IEEE 802.1q, 802.1p, 802.1d, 802.3x

I wrote to Dantz weeks ago but have not even had
a reply!


l.

-- 
---

Lindsay Robertson

Senior Technician
Psychology Department 
University of Otago
PO box 56
Dunedin
New Zealand

Phone   64 3 479 7668
Fax    64 3 479
8335

RE: Aarrggh! 519 error...-Spanning Tree Protocol?

[Rob Davies]

Title: RE: Aarrggh! 519 error...-Spanning Tree Protocol?





If it is the Spanning Tree Protocol causing the problem then you have two alternative courses of action - 
1. Disable it entirely, or 
2. Enable Portfast  at the Switch


The STP problem only affects Appletalk on the G3's & G4's, because the STP keeps the port closed during the  critical seconds at startup, when the Mac broadcasts its preferred Appletalk Address. The fast Macs do not wait long enough for the port to open. Hence it may get a duplicate address. You can force the Mac to rebroadcast it's address by turning Appletalk off then on manually, after it is running. This should give it a new, unique Appletalk Address. 

Refer to Apple's Tech Info Library for a complete discussion of symptoms of this infuriating problem.


-Rob







>We have a 519 network-loosing-connection-with-client-error, which i 
>have traced (finally) to a new HP Procurve 2424M switch installed as 
>a central switch in our star topology network.
>It has 100tx links to SMC Tigerswitches in other buildings.
>
>If the Blue and white G3 running retrospect is connected directly to 
>the HP switch only 4 of our 30 clients get backed up
>
>When i move the G3 to one of the arms of the star and plug into any 
>SMC switch the backup runs just fine achieving speeds up to 60 
>Mb/minute.
>
>The HP switch does not report any errors
>
>anyone come across this?


This might be a bit late to do any good, but I thought I'd mention one 
observation. I've had plenty of trouble in the past when setting up 
NetBoot labs where new switches have been installed. Starting with iMacs 
and B&W G3s (the first Macs with built-in 10/100 Ethernet), switches with 
Spanning Tree turned on do not work well (if at all) with those Macs. You 
might check your HP switch to make sure to turn off Spanning Tree 
routing/switching for the ports where you have your Macs. Once this was 
done in my NetBoot labs, everything sprang to life and it worked 
perfectly. Hope this helps...


Fred



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Re: Aarrggh! 519 error...

[Fred Turner, III]

>We have a 519 network-loosing-connection-with-client-error, which i 
>have traced (finally) to a new HP Procurve 2424M switch installed as 
>a central switch in our star topology network.
>It has 100tx links to SMC Tigerswitches in other buildings.
>
>If the Blue and white G3 running retrospect is connected directly to 
>the HP switch only 4 of our 30 clients get backed up
>
>When i move the G3 to one of the arms of the star and plug into any 
>SMC switch the backup runs just fine achieving speeds up to 60 
>Mb/minute.
>
>The HP switch does not report any errors
>
>anyone come across this?

This might be a bit late to do any good, but I thought I'd mention one 
observation. I've had plenty of trouble in the past when setting up 
NetBoot labs where new switches have been installed. Starting with iMacs 
and B&W G3s (the first Macs with built-in 10/100 Ethernet), switches with 
Spanning Tree turned on do not work well (if at all) with those Macs. You 
might check your HP switch to make sure to turn off Spanning Tree 
routing/switching for the ports where you have your Macs. Once this was 
done in my NetBoot labs, everything sprang to life and it worked 
perfectly. Hope this helps...

Fred


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Re: Aarrggh 519 error!

[Pat Lee]

on 7/20/00 9:50 PM, John Gee at [EMAIL PROTECTED] wrote:

>> Hi, remember a while ago, i had a 519 net retry error that i
>> couldn't work out...
> [...]
>> I have found a workaround: if I turn on Link Encryption on each
>> client everything runs smoothly!
> [...]
>> can anyone explain this?
> 
> Link encryption might slow down the client and server enough that the
> network switch does not overload.
> 
> Having just purchased a switch this week that works fine under light
> load, and fails under all forms of heavy load, it is an easy guess!
> :-(

It definitely sounds like you have a router/switch problem. If it fails
under heavy load, John is right that link encryption slows it down enough
that could help. Still, if it worked fine before the equipment and now fails
when crossing the new equipment, it is pointing to a bad unit most likely.

Pat



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Re: Aarrggh 519 error!

[John Gee]

>Hi, remember a while ago, i had a 519 net retry error that i
>couldn't work out...
[...]
>I have found a workaround: if I turn on Link Encryption on each
>client everything runs smoothly!
[...]
>can anyone explain this?

Link encryption might slow down the client and server enough that the 
network switch does not overload.

Having just purchased a switch this week that works fine under light 
load, and fails under all forms of heavy load, it is an easy guess! 
:-(
-- 
John Gee[EMAIL PROTECTED]
Dunedin, New ZealandProgrammers live in interesting times...



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Aarrggh 519 error!

[Lindsay Robertson]

Hi, remember a while ago, i had a 519 net retry error that i couldn't 
work out...

Well it turns out that it appeared when we upgraded our central 
network Lantech switch to a HP Procurve 2424m and i could only back 
up any machines on the network if i avoided going through the HP 
switch.

I have found a workaround: if I turn on Link Encryption on each 
client everything runs smoothly!

It has no advanced features turned on. (eg STP)

can anyone explain this?



l.






-- 
---

Lindsay Robertson

Senior Technician
Psychology Department
University of Otago
PO box 56
Dunedin
New Zealand

Phone   64 3 479 7668
Fax 64 3 479 8335



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Aarrggh! 519 error...

[Lindsay Robertson]

We have a 519 network-loosing-connection-with-client-error, which i 
have traced (finally) to a new HP Procurve 2424M switch installed as 
a central switch in our star topology network.
It has 100tx links to SMC Tigerswitches in other buildings.

If the Blue and white G3 running retrospect is connected directly to 
the HP switch only 4 of our 30 clients get backed up

When i move the G3 to one of the arms of the star and plug into any 
SMC switch the backup runs just fine achieving speeds up to 60 
Mb/minute.

The HP switch does not report any errors

anyone come across this?

l.



-- 
---

Lindsay Robertson

Senior Technician
Psychology Department
University of Otago
PO box 56
Dunedin
New Zealand

Phone   64 3 479 7668
Fax 64 3 479 8335



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