Kirti,
We once saw similar issues due to an MTU setting. Might be something to
check out.
Adam
-----Original Message-----
From: usr-tc-bounces+adam=semo.net(a)mailman.xmission.com
[mailto:usr-tc-bounces+adam=semo.net@mailman.xmission.com] On Behalf Of
Kirti S. Bajwa
Sent: Monday, January 30, 2006 8:47 AM
To: 'Discussion relating to the 3Com/US Robotics Total
Controlmodemsystems.'
Subject: RE: [USR-TC] This page can't be displayed!!
Simple. When some users connect to the internet using dial-in, they have
no problem connecting to our network. But when they try to connect out
of our network, such as yahoo, they get a message "this page can't be
displayed". It happens intermittently.
Any suggestion?
Kirti
-----Original Message-----
From: usr-tc-bounces+kbajwa=tibonline.net(a)mailman.xmission.com
[mailto:usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com] On
Behalf Of Todd
Sent: Monday, January 30, 2006 8:11 AM
To: 'Discussion relating to the 3Com/US Robotics Total
Controlmodemsystems.'
Subject: RE: [USR-TC] This page can't be displayed!!
What's your problem Kirti? I may be able to help.
Todd
-----Original Message-----
From: usr-tc-bounces+berto=core.com(a)mailman.xmission.com
[mailto:usr-tc-bounces+berto=core.com@mailman.xmission.com] On Behalf Of
Kirti S. Bajwa
Sent: Saturday, January 28, 2006 6:50 PM
To: 'Discussion relating to the 3Com/US Robotics Total
Controlmodemsystems.'
Subject: RE: [USR-TC] This page can't be displayed!!
Charles:
This is a typo. Each pool is 24.
FYI, 3COM assigns the IP address with no problem. Back to my original
problem. I hope you can help.
Kirti
-----Original Message-----
From: usr-tc-bounces+kbajwa=tibonline.net(a)mailman.xmission.com
[mailto:usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com] On
Behalf Of Charles Sprickman
Sent: Saturday, January 28, 2006 6:32 PM
To: Discussion relating to the 3Com/US Robotics Total Control modem
systems.
Subject: Re: [USR-TC] This page can't be displayed!!
On Sat, 28 Jan 2006, Kirti S. Bajwa wrote:
> ARC1(Port 15) 12.21.237.241 IP Pool: 12.21.237.48/31
> ARC2(Port 16) 12.21.237.242 IP Pool: 12.21.237.96/31
If that's not a typo, those pools each contain only two IP addresses...
That would cause problems.
Charles
> Kirti
>
>
>
>
> _______________________________________________
> USR-TC mailing list
> USR-TC(a)mailman.xmission.com
> http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
>
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
Kirti,
The 3COM system setting defaults to 1514.
We use radius to set MTU and we leave the 3com system to it's default.
We don't use FreeRadius, so I can't say where it is in the configs.
-----Original Message-----
From: usr-tc-bounces+adam=semo.net(a)mailman.xmission.com
[mailto:usr-tc-bounces+adam=semo.net@mailman.xmission.com] On Behalf Of
Kirti S. Bajwa
Sent: Monday, January 30, 2006 1:16 PM
To: 'Discussion relating to the 3Com/US Robotics Total
Controlmodemsystems.'
Subject: RE: [USR-TC] This page can't be displayed!!
Also where is this setting in 3COM?
-----------------------------
Todd:
I have looked into the freeRADIUS server files and did not find MTU
setting. Please be kind and let me know the file this setting is in?
Kirti
-----Original Message-----
From: usr-tc-bounces+kbajwa=tibonline.net(a)mailman.xmission.com
[mailto:usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com] On
Behalf Of Todd
Sent: Monday, January 30, 2006 1:54 PM
To: 'Discussion relating to the 3Com/US Robotics Total
Controlmodemsystems.'
Subject: RE: [USR-TC] This page can't be displayed!!
This does sound like a mtu setting. I believe you're going to want to
change the mtu in your auth/radius server config so that it is 1500
versus 576.
Todd
-----Original Message-----
From: usr-tc-bounces+berto=core.com(a)mailman.xmission.com
[mailto:usr-tc-bounces+berto=core.com@mailman.xmission.com] On Behalf Of
Kirti S. Bajwa
Sent: Monday, January 30, 2006 11:37 AM
To: 'Discussion relating to the 3Com/US Robotics Total
Controlmodemsystems.'
Subject: RE: [USR-TC] This page can't be displayed!!
I believe it is a MTU setting. Do you know which one?
Kirti
-----Original Message-----
From: usr-tc-bounces+kbajwa=tibonline.net(a)mailman.xmission.com
[mailto:usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com] On
Behalf Of Adam Barnhill
Sent: Monday, January 30, 2006 10:48 AM
To: Discussion relating to the 3Com/US Robotics Total Control
modemsystems.
Subject: RE: [USR-TC] This page can't be displayed!!
Kirti,
We once saw similar issues due to an MTU setting. Might be something to
check out.
Adam
-----Original Message-----
From: usr-tc-bounces+adam=semo.net(a)mailman.xmission.com
[mailto:usr-tc-bounces+adam=semo.net@mailman.xmission.com] On Behalf Of
Kirti S. Bajwa
Sent: Monday, January 30, 2006 8:47 AM
To: 'Discussion relating to the 3Com/US Robotics Total
Controlmodemsystems.'
Subject: RE: [USR-TC] This page can't be displayed!!
Simple. When some users connect to the internet using dial-in, they have
no problem connecting to our network. But when they try to connect out
of our network, such as yahoo, they get a message "this page can't be
displayed". It happens intermittently.
Any suggestion?
Kirti
-----Original Message-----
From: usr-tc-bounces+kbajwa=tibonline.net(a)mailman.xmission.com
[mailto:usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com] On
Behalf Of Todd
Sent: Monday, January 30, 2006 8:11 AM
To: 'Discussion relating to the 3Com/US Robotics Total
Controlmodemsystems.'
Subject: RE: [USR-TC] This page can't be displayed!!
What's your problem Kirti? I may be able to help.
Todd
-----Original Message-----
From: usr-tc-bounces+berto=core.com(a)mailman.xmission.com
[mailto:usr-tc-bounces+berto=core.com@mailman.xmission.com] On Behalf Of
Kirti S. Bajwa
Sent: Saturday, January 28, 2006 6:50 PM
To: 'Discussion relating to the 3Com/US Robotics Total
Controlmodemsystems.'
Subject: RE: [USR-TC] This page can't be displayed!!
Charles:
This is a typo. Each pool is 24.
FYI, 3COM assigns the IP address with no problem. Back to my original
problem. I hope you can help.
Kirti
-----Original Message-----
From: usr-tc-bounces+kbajwa=tibonline.net(a)mailman.xmission.com
[mailto:usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com] On
Behalf Of Charles Sprickman
Sent: Saturday, January 28, 2006 6:32 PM
To: Discussion relating to the 3Com/US Robotics Total Control modem
systems.
Subject: Re: [USR-TC] This page can't be displayed!!
On Sat, 28 Jan 2006, Kirti S. Bajwa wrote:
> ARC1(Port 15) 12.21.237.241 IP Pool: 12.21.237.48/31
> ARC2(Port 16) 12.21.237.242 IP Pool: 12.21.237.96/31
If that's not a typo, those pools each contain only two IP addresses...
That would cause problems.
Charles
> Kirti
>
>
>
>
> _______________________________________________
> USR-TC mailing list
> USR-TC(a)mailman.xmission.com
> http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
>
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
_______________________________________________
USR-TC mailing list
USR-TC(a)mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
Hello:
For the last few days I have posted the following question:
============
Please help. This problem is going on for the last 7 weeks without
fixing.
TC1000
1-HiPer NMC
2-HiPerARC
10-Hiper DSP
We are a small ISP (400 customers). We have 2-ISDN-PRI lines for our
customers to dial in. Our entire system looks like this:
/
/ T1 to External Internet
/
CISCO 26XX Router
|
HUB 10/100
|
---------------------------------------------------------------|
| | | | |
NMC ARC1 ARC2 Web Authentication
----------- 3Com ------------ Server/Email
| | | | | | | | |
Customer Dial-In
Our customers can dial-in, are authenticated and can access the internal
web site (www.tibonline.net) and retrieve their email. But when they try
to connect to any web site (outside our network) on the external net
(such as www.yahoo.com) they time out with a message saying that "this
page can't be displayed".
We have changed the HUBs, RJ45 cables. We have the CISCO Router tested
fine. Finally, I replaced the 3COM box with a backup box and the problem
continues. Interestingly, we can access any Internet web site
(www.msn.com, www.yahoo.com, etc.) from our internal network (over LAN)
without problem.
============
Since posting the above message, we have received a number of responses.
Charles suggested to see how the CISCO 2600 was assigning the IP
addresses (or something similar!!). For the last two days, AT&T
technicians has been working with me to look into the router. They have
setup static address and have done number of settings without success.
I have switched 3COM to a backup 3COM box. Following are new the IP
address:
NMC (Port 17) 12.21.237.240
ARC1(Port 15) 12.21.237.241 IP Pool: 12.21.237.48/31
ARC2(Port 16) 12.21.237.242 IP Pool: 12.21.237.96/31
The problem is that out Dial-In customers can dial-in, access the
internal network (email, authentication, DNS, Web Servers) but can not
access the external Network (www.msn.com) etc.
I have setup a dial-up PC (Win XP Pro) to test. The first time I
connected, the IP address assigned was 12.21.237.98. I could not access
the external network.
I tried to do a external trace from www.traceroute.org. Following are
the results of the trace.
-------- Call this TRACE-1
Testing the network route from EASYNEWS.COM to 12.21.237.98...
Started on Thursday July 28th, 2005 at 17:37:05 GMT (1122597425)
HOST LOSS RCVD SENT BEST AVG WORST
ge1-8-1000m.sw1.easynews.com 0% 10 10 0.35 3.29
28.63
e-2-11-1000m.core-03.phx1.puregig.net 0% 10 10 0.29
0.56 1.65
12.118.42.25 0% 10 10 10.84 33.96 117.05
12.123.28.58 0% 10 10 57.70 58.01 58.83
tbr1-cl2.dlstx.ip.att.net 0% 10 10 54.24 66.34
171.39
tbr2-cl1.attga.ip.att.net 0% 10 10 59.23 73.93
154.81
ar13-p3110.attga.ip.att.net 0% 10 10 52.91 94.74
205.18
12.124.52.74 0% 10 10 70.30 77.15 110.81
12.21.237.241 0% 10 10 63.97 64.57 65.97
??? 100% 0 10 0.00 0.00 0.00
--------
Few minutes later, I dial-in and re-connected. This time, I connected to
IP address 12.21.237.99. This time I could go to external Internet no
problem.
-------- Call this TRACE-2
Testing the network route from EASYNEWS.COM to 12.21.237.99...
Started on Thursday July 28th, 2005 at 17:45:23 GMT (1122597923)
HOST LOSS RCVD SENT BEST AVG WORST
ge1-8-1000m.sw1.easynews.com 0% 10 10 0.35 4.46
38.83
e-2-11-1000m.core-03.phx1.puregig.net 0% 10 10 0.28
0.34 0.38
12.118.42.25 0% 10 10 10.68 10.84 10.97
12.123.28.58 0% 10 10 57.70 58.16 59.00
tbr1-cl2.dlstx.ip.att.net 0% 10 10 53.09 63.09
148.52
tbr2-cl1.attga.ip.att.net 0% 10 10 58.09 60.96
83.12
ar13-p3110.attga.ip.att.net 0% 10 10 51.81 92.41
256.88
12.124.52.74 0% 10 10 69.03 71.50 87.39
12.21.237.241 0% 10 10 63.16 66.77 87.36
12.21.237.242 0% 10 10 64.35 71.89 94.87
12.21.237.99 10% 9 10 166.21 245.81 808.73
--------
In TRACE-1 (outside network can not be connected) the trace stops at
ARC1 (12.21.237.241). In TRACE-2 (outside network is connected & the
dial-in connection works), the trace gets to my dial-in terminal
(12.21.237.99).
I have noticed couple of things in the above traces. In both traces,
ARC1[Kirti S. Bajwa] (12.21.237.241) is first traced even though the IP
address of my terminal (12.21.237.98 or 12.21.237.99) is on ARC2
(12.21.237.242)!! Can someone explain why trace is always first going to
ARC1 IP?
Can someone explain what is going on? Why sometime the dial-in wotks
(access the external network) and other times it does not? AT&T is going
to call back around 3:00PM (EST) to help. Is 3COM needs some settings
changed?
Thanks in advance.
Kirti
