IPv6 vs IPv4 (Re: Sprint NOC? Are you awake now?)

Tue Sep 2 21:18:23 UTC 2003

I do not send e-maol to complain about my connection to puck.nether.net 
,neither I claim I have a excelent ipv6 connection ,what triggerd 
my-e-mail was the someone complining to not be able to reach your site.
I have more than few ways to making it reachable  .
My e-mail was more to rise the general diskussion about this issue and 
puck.nether.net was only the example

Again my point is that your site (or any other that use the same dns for 
ipv4 and 6) may be "blackholed" by ipv6 (it is not the question primary 
about the quality ipv6 connction it is the fact that your ipv4 
connection which may be excelant is blackholed with your ipv6 connection 
which may not be good and to me the most obvious solution is not to use 
the same dns name for both) for the people coming through 6bone or even 
for the majority of people   not peering with Verio.

This the trace from 6 bone looking glass

traceroute6 to 2001:418:3f4:0:2a0:24ff:fe83:53d8 (2001:418:3f4:0:2a0:24ff:fe83:53d8) from 2001:6b8::204, 30 hops max, 12 byte packets
 1  6bone-gw4  0.749 ms  0.537 ms  0.506 ms
 2  gw1-bk1  1.103 ms  1.101 ms  1.046 ms
 3  tu-16.r00.plalca01.us.b6.verio.net  186.424 ms  186.129 ms  187.344 ms
 4  tu-800.r00.asbnva01.us.b6.verio.net  246.76 ms  246.798 ms  246.759 ms
 5  t2914.nnn-7202.nether.net  458.76 ms  446.925 ms  496.061 ms
 6  2001:418:3f4:0:2a0:24ff:fe83:53d8  450.172 ms  477.296 ms  453.895 ms

nenad

Jared Mauch wrote:

>(btw, for those of you who think that IPv6 isn't in use, you may now
>safely ignore this thread).
>
>On Tue, Sep 02, 2003 at 04:34:18PM -0400, Nenad Pudar wrote:
>  
>
>>My enviroment is far to be broken my friend.
>>This is not question about me or my environoment this question about 
>>your site ,I can always mange to get such a sites if I want but I am not 
>>sure that some other people are even awre what the problem is.
>>I think that still majority of ipv6 connections is through 6 bone and 
>>there you do have a latency and
>>evrybody using the same dns for ipv4 and ipv6 should re-think it over
>>    
>>
>
>	i would say that I serve a moderate number of web pages
>a day off my web server.  (warning, big!)  here are some
>statistics: http://puck.nether.net/stats.html
>
>	this is the first complaint i've received of accessing
>puck via ipv6 (aside from when i was running a buggy kernel that would
>cause it to stop responding to the v6 address periodically).
>
>	here's some stats for my sendmail as well:
>
>puck:~> grep sm-mta /var/log/maillog | wc -l
>  30350
>puck:~> grep IPv6 /var/log/maillog  | wc -l
>    405
>puck:~> grep IPv6 /var/log/maillog.Mon | wc -l
>    324
>puck:~> grep IPv6 /var/log/maillog.Fri | wc -l
>    324
>puck:~> grep IPv6 /var/log/maillog.Thu | wc -l
>    865
>
>	This means i'm getting a small number of emails sent via IPv6
>without troubles.  Might I suggest the problem is on your end.  Do
>you have all the latest solaris patches installed?
>
>	Either that, or ifconfig down your ipv6 interface or remove
>the autoconf from your machine as necessary until you have a chance
>to test it.  In the mean time, you can visit the webpage here:
>http://204.42.254.5/netops/  I try to always use / referencing
>urls, so it should work just fine for you.  If you notice a url
>that does not just reference /, please let me know.
>
>	- Jared
>
>  
>
>>Jared Mauch wrote:
>>
>>    
>>
>>>On Tue, Sep 02, 2003 at 10:47:14PM +0300, Petri Helenius wrote:
>>>
>>>
>>>      
>>>
>>>>Nenad Pudar wrote:
>>>>
>>>>  
>>>>
>>>>        
>>>>
>>>>>OK
>>>>>The point is that ipv6 connection is not good enough to be used.
>>>>>And for the sites that have the same dns for ipv4 and ipv6 ipv6 in a 
>>>>>way "blackhole" ipv4 connection.
>>>>>In this case puck.nether.net is timinig out from time to time (going 
>>>>>over ipv6) instead of going over ipv4 network.
>>>>>
>>>>>    
>>>>>
>>>>>          
>>>>>
>>>>Disable ipv6 from your routers / hosts. If that is not an option, type 
>>>>in the ipv4
>>>>address to your browsers but don´t tell other people to break their 
>>>>systems
>>>>because your environment is broken.
>>>>  
>>>>
>>>>        
>>>>
>>>	I wonder if I should re-enable ecn as well then.
>>>
>>>	get those broken people to fix their systems...but I don't
>>>think i'm an important enough internet resource for people to listen
>>>to me.
>>>
>>>	btw, if you http://<ip-of-puck>/ you will get the correct web
>>>pages.
>>>
>>>	- jared
>>>
>>>
>>>
>>>      
>>>
>>-- 
>>
>>
>>
>>
>>
>>Nenad Pudar
>>IP Network Engineer
>>TELEGLOBE
>>phone: 1 514 868 8053
>>
>>
>>
>>
>>
>>    
>>
>
>
>  
>

-- 

Nenad Pudar
IP Network Engineer
TELEGLOBE
phone: 1 514 868 8053