North American Network Operators Group
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

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

  • From: Nenad Pudar
  • Date: Tue Sep 02 17:23:02 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