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Packet Loss -- Where to report?
si Money
The nice demon.
Join date: 21 May 2003
Posts: 477
02-22-2005 14:02
So, first things first.

Moved to a new internet connection, and I have constant minor packet loss to SL. Not a huge deal, internet path problem is probably at fault. However, I would like to get it resolved. The problem is, I need Linden help to resolve this, as I can't troubleshoot from the other end.

Where do I send such a problem? Will Lindens look at it here?

This is what I see:

CODE

anti.darkness.nu                                       Tue Feb 22 15:57:52 2005
Keys:  D - Display mode    R - Restart statistics    Q - Quit
                                           Packets               Pings
Hostname                                %Loss  Rcv  Snt  Last Best  Avg  Worst
 1. private.darkness.nu                    0%  213  213     8    5    8     35
 2. 24.217.2.157                           0%  213  213     8    6    8     29
 3. 12.124.129.97                          0%  213  213     9    6    9     21
 4. gbr5-p40.sl9mo.ip.att.net              0%  213  213    10    6    9     27
 5. tbr1-p013501.sl9mo.ip.att.net          0%  213  213    10    7   10     26
 6. tbr1-cl2.sffca.ip.att.net              0%  213  213    58   55   57     67
 7. gbr2-p10.sffca.ip.att.net              0%  213  213    54   50   53     70
 8. gar1-p370.sffca.ip.att.net             0%  213  213    58   54   57    117
 9. ???
10. border5.ge4-1-bbnet2.sfo.pnap.net      0%  212  212    64   52   63    267
11. sim13.agni.lindenlab.com              11%  190  212    54   52   55     73


Now, normally I would attribute this to the sim server being at high load, and ICMP being a low priority protocol, but this matches up with the packet loss I see too, so I suspect this is actually a valid representation of the problem.

Linden Labs -- can you help me out? I can bring this to the Tier 1 ISPs involved between, but I need a traceroute going the other direction (preferrably one using a consistent method like MTR above) so I can see if we have asymmetrical routing, and if the problem lies on the return path rather than the forward (which it appears to).

Otherwise, can you bring this to PNAP from your side and see if you can resolve it that way? I can provide whatever diagnostics needed.
_____________________
Like a soul without a mind
In a body without a heart
I'm missing every part

-- Progress --
Catherine Omega: Yes, but lots of stuff isn't listed. "Making UI harder to use than ever" and "removing all the necessary status icons" things.... there's nothing like that in the release notes. :)
Lee Linden
llBuildMonkey();
Join date: 31 Dec 1969
Posts: 743
02-22-2005 15:41
Unfortunately, the Forums are not a proper place to post IPs and traceroutes. You should contact [email]support@secondlife.com[/email] directly.
si Money
The nice demon.
Join date: 21 May 2003
Posts: 477
02-22-2005 19:01
At the risk of sounding possibly too 'aggro', are you telling me there is nowhere inside SL that one can report a connectivity problem except for a single email address which will never be responded to? This is either a really bad oversight or a joke?


From: [email]MAILER-DAEMON@hyper.lindenlab.com[/email] (Mail Delivery System)
Subject: Undelivered Mail Returned to Sender

This is the Postfix program at host hyper.lindenlab.com.

I'm sorry to have to inform you that your message could not be
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The Postfix program

<support@rt.lindenlab.com>: mail for rt.lindenlab.com loops back to myself

[-- Attachment #2: Delivery report --]
[-- Type: message/delivery-status, Encoding: 7bit, Size: 0.3K --]

Reporting-MTA: dns; hyper.lindenlab.com
X-Postfix-Queue-ID: 0F289803D4EF
X-Postfix-Sender: rfc822; [email]si@challenger.darkness.nu[/email]
Arrival-Date: Tue, 22 Feb 2005 18:53:03 -0800 (PST)

Final-Recipient: rfc822; [email]support@rt.lindenlab.com[/email]
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; mail for rt.lindenlab.com loops back to myself

[-- Attachment #3: Undelivered Message --]
[-- Type: message/rfc822, Encoding: 8bit, Size: 4.8K --]

Delivered-To: [email]support@secondlife.com[/email]
Date: Tue, 22 Feb 2005 20:52:53 -0600
From: si <si@darkness.nu>
To: [email]support@secondlife.com[/email]
Subject: [bugs@secondlife.com: [rt.lindenlab.com #28352] AutoReply: Bug: Packet
_____________________
Like a soul without a mind
In a body without a heart
I'm missing every part

-- Progress --
Catherine Omega: Yes, but lots of stuff isn't listed. "Making UI harder to use than ever" and "removing all the necessary status icons" things.... there's nothing like that in the release notes. :)
Magnum Serpentine
Registered User
Join date: 20 Nov 2003
Posts: 1,811
02-22-2005 20:23
From: Lee Linden
Unfortunately, the Forums are not a proper place to post IPs and traceroutes. You should contact [email]support@secondlife.com[/email] directly.


Can you tell me a good IP address I can use to test trace route to Linden Labs?
_____________________
Zuzi Martinez
goth dachshund
Join date: 4 Sep 2004
Posts: 1,860
02-22-2005 20:34
it looks like you can get the address of the sim you're in if you look at Help > About SL or such. maybe that would work.
Jana Fleming
SL Resident
Join date: 25 Oct 2004
Posts: 319
from the Lindens
02-22-2005 21:30
Linden Email Down for Upgrade

--------------------------------------------------------------------------------

The email server for Linden Lab is being upgraded, and we can't receive any emails until the upgrade is complete. Mail to individual Lindens, as well as to various general addresses such as [email]support@lindenlab.com[/email] will bounce while the switch is being made. We're sorry for this inconvenience, and ask for your patience in resending your mails tomorrow morning.
Philip Linden
Founder, Linden Lab
Join date: 18 Nov 2002
Posts: 428
02-23-2005 08:36
This looks curious and I want to investigate further - ICMP loss indicates no local bandwidth problems, and the loss is happening at our server. Si thanks for the report. Sorry that it initially may have confused us.
_____________________
Philip Linden
Chairman & Founder, Linden Lab
blog: http://secondlife.blogs.com/philip
si Money
The nice demon.
Join date: 21 May 2003
Posts: 477
02-23-2005 09:38
From: Philip Linden
This looks curious and I want to investigate further - ICMP loss indicates no local bandwidth problems, and the loss is happening at our server. Si thanks for the report. Sorry that it initially may have confused us.


Philip,
Thank you for the reply -- it is also possible that the problem lies somewhere in the return path, should the routing be asymmetric at the sim server. I obviously have no visibility to this, but you're welcome to perform traceroutes back towards me @ anti.darkness.nu (24.182.131.186) (use -I flag, UDP traceroutes won't make it to the last hop) if this needs to be verified.
_____________________
Like a soul without a mind
In a body without a heart
I'm missing every part

-- Progress --
Catherine Omega: Yes, but lots of stuff isn't listed. "Making UI harder to use than ever" and "removing all the necessary status icons" things.... there's nothing like that in the release notes. :)
Philip Linden
Founder, Linden Lab
Join date: 18 Nov 2002
Posts: 428
02-23-2005 09:44
Si,

It would be incredibly helpful (if you have the time) to send me and [email]chris@lindenlab.com[/email] an email in real-time if you see this happening again. Are you seeing that loss on sim13 right now? We aren't. If the loss comes and goes when the sim is loaded, that is important and definitely means we (LL) have a problem.
_____________________
Philip Linden
Chairman & Founder, Linden Lab
blog: http://secondlife.blogs.com/philip
si Money
The nice demon.
Join date: 21 May 2003
Posts: 477
02-23-2005 09:51
From: Philip Linden
Si,

It would be incredibly helpful (if you have the time) to send me and [email]chris@lindenlab.com[/email] an email in real-time if you see this happening again. Are you seeing that loss on sim13 right now? We aren't. If the loss comes and goes when the sim is loaded, that is important and definitely means we (LL) have a problem.


Actually I just logged in to look, i'm seeing 0.0 packet loss steady right now, testing confirms the same:

CODE

challenger.darkness.nu(tos=0x0 psize=64 bitpattern=0x00Wed Feb 23 11:49:48 2005
Keys:  Help   Display mode   Restart statistics   Order of fields   quit
                                       Packets               Pings
 Host                                Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. anti-p.darkness.nu                0.0%    51    0.6   0.7   0.6   1.3   0.2
 2. private.darkness.nu               0.0%    51    7.9   8.9   6.8  17.8   2.3
 3. 24.217.2.157                      0.0%    51    8.0   9.8   7.7  23.0   2.8
 4. 12.124.129.97                     0.0%    51    8.2  10.5   7.6  20.3   3.4
 5. gbr5-p40.sl9mo.ip.att.net         0.0%    51    8.1   9.5   7.3  23.0   2.7
 6. tbr1-p013501.sl9mo.ip.att.net     0.0%    51    8.8  11.2   8.2  20.4   3.1
 7. tbr1-cl2.sffca.ip.att.net         0.0%    51   55.3  55.4  51.9  76.1   4.1
 8. gbr1-p10.sffca.ip.att.net         0.0%    51   50.5  52.2  49.1  68.8   3.9
 9. gar1-p360.sffca.ip.att.net        0.0%    51   56.2  57.3  55.2  69.4   2.6
10. ???
11. border5.ge3-1-bbnet1.sfo.pnap.ne  0.0%    51   54.6  55.1  52.9  63.9   2.3
12. sim13.agni.lindenlab.com          0.0%    51   57.5  59.8  57.1  69.9   3.1


I tested to sim436, my present sim, with the same results.
_____________________
Like a soul without a mind
In a body without a heart
I'm missing every part

-- Progress --
Catherine Omega: Yes, but lots of stuff isn't listed. "Making UI harder to use than ever" and "removing all the necessary status icons" things.... there's nothing like that in the release notes. :)
si Money
The nice demon.
Join date: 21 May 2003
Posts: 477
02-23-2005 19:29
Email: sent. Seeing matching problem right now.
_____________________
Like a soul without a mind
In a body without a heart
I'm missing every part

-- Progress --
Catherine Omega: Yes, but lots of stuff isn't listed. "Making UI harder to use than ever" and "removing all the necessary status icons" things.... there's nothing like that in the release notes. :)