Charles: Two years ago, when I initially setup #Com, I had a similar problem. At that time, I no-op (#) "FRAMED-MTU" line in the "USER" file in the freeRADIUS server. Everything started working and has worked since except few weeks ago when the problem re-started. Therefore my feeling is that MTU might be the culprit. I will double check the default route in ARC. I had it set originally. For the last couple of years, CISCO router has worked fine. I do not know how it is managed as it is managed by AT&T. I will check with them. Here is something you can help with! Why is it that sometimes a customer can connect the Internet (outside our network) and other times they do not? Kirt -----Original Message----- From: usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com [mailto:usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com] On Behalf Of Charles Sprickman Sent: Monday, July 25, 2005 3:03 PM To: Discussion relating to the 3Com/US Robotics Total Control modem systems. Subject: RE: [USR-TC] RE: Dial-In Problem!!!! On Mon, 25 Jul 2005, Kirti S. Bajwa wrote:
Please be kind and direct me to the location (and/or) procedure to change the MTU? Is it in 3Com or someplace else? I am much obliged.
I wouldn't go chasing MTU down. Default MTU will be fine, some people like to tweak for performance, but it won't clobber all access (and people would not reach your internal site either). My money is on either: -your ARC does not have a default route set -if you have a seperate network for dialup ips, your cisco does not have a static route pointing to the ARC Charles
Kirt
-----Original Message----- From: usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com [mailto:usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com] On
Behalf
Of Jason Percle Sent: Monday, July 25, 2005 1:37 PM To: 'Discussion relating to the 3Com/US Robotics Total Controlmodemsystems.' Subject: RE: [USR-TC] RE: Dial-In Problem!!!!
Check your MTU size. I believe the recommended size for dialup is 576.
_____
From: usr-tc-bounces+jjperc=petronet.net@mailman.xmission.com [mailto:usr-tc-bounces+jjperc=petronet.net@mailman.xmission.com] On Behalf Of Kirti S. Bajwa Sent: Monday, July 25, 2005 6:31 PM To: usr-tc@mailman.xmission.com Subject: [USR-TC] RE: Dial-In Problem!!!!
Hello:
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 Internet Backbone
/
CISCO 26XX Router
|
HUB 10/100
|
----------------------------------------------------------------------------
-----------------------------
| | | | | |
NMC ARC1 ARC2 Web Authentication Internal Network
----------- 3Com ------------ Server email Server
| | | | | | | | | | | |
Customer Dial-In
Our customers can dial-in, are authenticated and can access the internal web site (www.tibonline.net <http://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 <http://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 <http://www.msn.com/> , www.yahoo.com <http://www.yahoo.com/> , etc.) from our internal network (over LAN) without problem.
I have called Sprint, who provides us with ISDN-PRI lines. They claim that the lines are testing OK.
Has anyone faced the similar problem? If YES, what was the solution?
Kirti
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